mammalian phenotype
        cellular phenotype
                abnormal cell physiology
                        abnormal cell differentiation
                                abnormal mononuclear cell differentiation
                                        abnormal lymphopoiesis
                                                abnormal B cell differentiation
                                                        abnormal immature B cell morphology
                                                                abnormal pre-B cell morphology +
                                                                abnormal transitional stage B cell morphology +
                                                                absent immature B cells +
                                                                decreased immature B cell number [MP:0008215] (274 genotypes, 368 annotations)
                                                                        absent immature B cells +
                                                                        decreased pre-B cell number +
                                                                        decreased transitional stage B cell number +
                                                                increased immature B cell number +

---

mammalian phenotype
        hematopoietic system phenotype
                abnormal hematopoietic system morphology/development
                        abnormal blood cell morphology/development
                                abnormal hematopoiesis
                                        abnormal hematopoietic cell number
                                                abnormal leukocyte cell number
                                                        abnormal lymphocyte cell number
                                                                abnormal B cell number
                                                                        decreased B cell number
                                                                                absent B cells +
                                                                                decreased immature B cell number [MP:0008215] (274 genotypes, 368 annotations)
                                                                                        absent immature B cells +
                                                                                        decreased pre-B cell number +
                                                                                        decreased transitional stage B cell number +
                                                                                decreased mature B cell number +

---

mammalian phenotype
        hematopoietic system phenotype
                abnormal hematopoietic system morphology/development
                        abnormal blood cell morphology/development
                                abnormal hematopoiesis
                                        abnormal hematopoietic cell number
                                                abnormal leukocyte cell number
                                                        abnormal lymphocyte cell number
                                                                decreased lymphocyte cell number
                                                                        decreased B cell number
                                                                                absent B cells +
                                                                                decreased immature B cell number [MP:0008215] (274 genotypes, 368 annotations)
                                                                                        absent immature B cells +
                                                                                        decreased pre-B cell number +
                                                                                        decreased transitional stage B cell number +
                                                                                decreased mature B cell number +

---

mammalian phenotype
        hematopoietic system phenotype
                abnormal hematopoietic system morphology/development
                        abnormal blood cell morphology/development
                                abnormal hematopoiesis
                                        abnormal hematopoietic cell number
                                                abnormal leukocyte cell number
                                                        decreased leukocyte cell number
                                                                decreased lymphocyte cell number
                                                                        decreased B cell number
                                                                                absent B cells +
                                                                                decreased immature B cell number [MP:0008215] (274 genotypes, 368 annotations)
                                                                                        absent immature B cells +
                                                                                        decreased pre-B cell number +
                                                                                        decreased transitional stage B cell number +
                                                                                decreased mature B cell number +

---

mammalian phenotype
        hematopoietic system phenotype
                abnormal hematopoietic system morphology/development
                        abnormal blood cell morphology/development
                                abnormal hematopoiesis
                                        abnormal hematopoietic cell number
                                                decreased hematopoietic cell number
                                                        decreased leukocyte cell number
                                                                decreased lymphocyte cell number
                                                                        decreased B cell number
                                                                                absent B cells +
                                                                                decreased immature B cell number [MP:0008215] (274 genotypes, 368 annotations)
                                                                                        absent immature B cells +
                                                                                        decreased pre-B cell number +
                                                                                        decreased transitional stage B cell number +
                                                                                decreased mature B cell number +

---

mammalian phenotype
        hematopoietic system phenotype
                abnormal hematopoietic system morphology/development
                        abnormal blood cell morphology/development
                                abnormal hematopoiesis
                                        abnormal leukocyte morphology
                                                abnormal leukocyte cell number
                                                        abnormal lymphocyte cell number
                                                                abnormal B cell number
                                                                        decreased B cell number
                                                                                absent B cells +
                                                                                decreased immature B cell number [MP:0008215] (274 genotypes, 368 annotations)
                                                                                        absent immature B cells +
                                                                                        decreased pre-B cell number +
                                                                                        decreased transitional stage B cell number +
                                                                                decreased mature B cell number +

---

mammalian phenotype
        hematopoietic system phenotype
                abnormal hematopoietic system morphology/development
                        abnormal blood cell morphology/development
                                abnormal hematopoiesis
                                        abnormal leukocyte morphology
                                                abnormal leukocyte cell number
                                                        abnormal lymphocyte cell number
                                                                decreased lymphocyte cell number
                                                                        decreased B cell number
                                                                                absent B cells +
                                                                                decreased immature B cell number [MP:0008215] (274 genotypes, 368 annotations)
                                                                                        absent immature B cells +
                                                                                        decreased pre-B cell number +
                                                                                        decreased transitional stage B cell number +
                                                                                decreased mature B cell number +

---

mammalian phenotype
        hematopoietic system phenotype
                abnormal hematopoietic system morphology/development
                        abnormal blood cell morphology/development
                                abnormal hematopoiesis
                                        abnormal leukocyte morphology
                                                abnormal leukocyte cell number
                                                        decreased leukocyte cell number
                                                                decreased lymphocyte cell number
                                                                        decreased B cell number
                                                                                absent B cells +
                                                                                decreased immature B cell number [MP:0008215] (274 genotypes, 368 annotations)
                                                                                        absent immature B cells +
                                                                                        decreased pre-B cell number +
                                                                                        decreased transitional stage B cell number +
                                                                                decreased mature B cell number +

---

mammalian phenotype
        hematopoietic system phenotype
                abnormal hematopoietic system morphology/development
                        abnormal blood cell morphology/development
                                abnormal hematopoiesis
                                        abnormal leukocyte morphology
                                                abnormal mononuclear cell morphology
                                                        abnormal lymphocyte morphology
                                                                abnormal B cell morphology
                                                                        abnormal B cell differentiation
                                                                                abnormal immature B cell morphology
                                                                                        abnormal pre-B cell morphology +
                                                                                        abnormal transitional stage B cell morphology +
                                                                                        absent immature B cells +
                                                                                        decreased immature B cell number [MP:0008215] (274 genotypes, 368 annotations)
                                                                                                absent immature B cells +
                                                                                                decreased pre-B cell number +
                                                                                                decreased transitional stage B cell number +
                                                                                        increased immature B cell number +

---

mammalian phenotype
        hematopoietic system phenotype
                abnormal hematopoietic system morphology/development
                        abnormal blood cell morphology/development
                                abnormal hematopoiesis
                                        abnormal leukocyte morphology
                                                abnormal mononuclear cell morphology
                                                        abnormal lymphocyte morphology
                                                                abnormal B cell morphology
                                                                        abnormal B cell number
                                                                                decreased B cell number
                                                                                        absent B cells +
                                                                                        decreased immature B cell number [MP:0008215] (274 genotypes, 368 annotations)
                                                                                                absent immature B cells +
                                                                                                decreased pre-B cell number +
                                                                                                decreased transitional stage B cell number +
                                                                                        decreased mature B cell number +

---

mammalian phenotype
        hematopoietic system phenotype
                abnormal hematopoietic system morphology/development
                        abnormal blood cell morphology/development
                                abnormal hematopoiesis
                                        abnormal leukocyte morphology
                                                abnormal mononuclear cell morphology
                                                        abnormal lymphocyte morphology
                                                                abnormal B cell morphology
                                                                        abnormal immature B cell morphology
                                                                                abnormal pre-B cell morphology +
                                                                                abnormal transitional stage B cell morphology +
                                                                                absent immature B cells +
                                                                                decreased immature B cell number [MP:0008215] (274 genotypes, 368 annotations)
                                                                                        absent immature B cells +
                                                                                        decreased pre-B cell number +
                                                                                        decreased transitional stage B cell number +
                                                                                increased immature B cell number +

---

mammalian phenotype
        hematopoietic system phenotype
                abnormal hematopoietic system morphology/development
                        abnormal blood cell morphology/development
                                abnormal hematopoiesis
                                        abnormal leukocyte morphology
                                                abnormal mononuclear cell morphology
                                                        abnormal lymphocyte morphology
                                                                abnormal lymphocyte cell number
                                                                        abnormal B cell number
                                                                                decreased B cell number
                                                                                        absent B cells +
                                                                                        decreased immature B cell number [MP:0008215] (274 genotypes, 368 annotations)
                                                                                                absent immature B cells +
                                                                                                decreased pre-B cell number +
                                                                                                decreased transitional stage B cell number +
                                                                                        decreased mature B cell number +

---

mammalian phenotype
        hematopoietic system phenotype
                abnormal hematopoietic system morphology/development
                        abnormal blood cell morphology/development
                                abnormal hematopoiesis
                                        abnormal leukocyte morphology
                                                abnormal mononuclear cell morphology
                                                        abnormal lymphocyte morphology
                                                                abnormal lymphocyte cell number
                                                                        decreased lymphocyte cell number
                                                                                decreased B cell number
                                                                                        absent B cells +
                                                                                        decreased immature B cell number [MP:0008215] (274 genotypes, 368 annotations)
                                                                                                absent immature B cells +
                                                                                                decreased pre-B cell number +
                                                                                                decreased transitional stage B cell number +
                                                                                        decreased mature B cell number +

---

mammalian phenotype
        hematopoietic system phenotype
                abnormal hematopoietic system morphology/development
                        abnormal blood cell morphology/development
                                abnormal hematopoiesis
                                        abnormal leukocyte morphology
                                                abnormal mononuclear cell morphology
                                                        abnormal lymphocyte morphology
                                                                abnormal lymphopoiesis
                                                                        abnormal B cell differentiation
                                                                                abnormal immature B cell morphology
                                                                                        abnormal pre-B cell morphology +
                                                                                        abnormal transitional stage B cell morphology +
                                                                                        absent immature B cells +
                                                                                        decreased immature B cell number [MP:0008215] (274 genotypes, 368 annotations)
                                                                                                absent immature B cells +
                                                                                                decreased pre-B cell number +
                                                                                                decreased transitional stage B cell number +
                                                                                        increased immature B cell number +

---

mammalian phenotype
        hematopoietic system phenotype
                abnormal hematopoietic system morphology/development
                        abnormal blood cell morphology/development
                                abnormal hematopoiesis
                                        abnormal leukopoiesis
                                                abnormal lymphopoiesis
                                                        abnormal B cell differentiation
                                                                abnormal immature B cell morphology
                                                                        abnormal pre-B cell morphology +
                                                                        abnormal transitional stage B cell morphology +
                                                                        absent immature B cells +
                                                                        decreased immature B cell number [MP:0008215] (274 genotypes, 368 annotations)
                                                                                absent immature B cells +
                                                                                decreased pre-B cell number +
                                                                                decreased transitional stage B cell number +
                                                                        increased immature B cell number +

---

mammalian phenotype
        hematopoietic system phenotype
                abnormal hematopoietic system morphology/development
                        abnormal blood cell morphology/development
                                abnormal hematopoiesis
                                        abnormal leukopoiesis
                                                abnormal mononuclear cell differentiation
                                                        abnormal lymphopoiesis
                                                                abnormal B cell differentiation
                                                                        abnormal immature B cell morphology
                                                                                abnormal pre-B cell morphology +
                                                                                abnormal transitional stage B cell morphology +
                                                                                absent immature B cells +
                                                                                decreased immature B cell number [MP:0008215] (274 genotypes, 368 annotations)
                                                                                        absent immature B cells +
                                                                                        decreased pre-B cell number +
                                                                                        decreased transitional stage B cell number +
                                                                                increased immature B cell number +

---

mammalian phenotype
        hematopoietic system phenotype
                abnormal hematopoietic system morphology/development
                        abnormal blood cell morphology/development
                                abnormal leukocyte morphology
                                        abnormal leukocyte cell number
                                                abnormal lymphocyte cell number
                                                        abnormal B cell number
                                                                decreased B cell number
                                                                        absent B cells +
                                                                        decreased immature B cell number [MP:0008215] (274 genotypes, 368 annotations)
                                                                                absent immature B cells +
                                                                                decreased pre-B cell number +
                                                                                decreased transitional stage B cell number +
                                                                        decreased mature B cell number +

---

mammalian phenotype
        hematopoietic system phenotype
                abnormal hematopoietic system morphology/development
                        abnormal blood cell morphology/development
                                abnormal leukocyte morphology
                                        abnormal leukocyte cell number
                                                abnormal lymphocyte cell number
                                                        decreased lymphocyte cell number
                                                                decreased B cell number
                                                                        absent B cells +
                                                                        decreased immature B cell number [MP:0008215] (274 genotypes, 368 annotations)
                                                                                absent immature B cells +
                                                                                decreased pre-B cell number +
                                                                                decreased transitional stage B cell number +
                                                                        decreased mature B cell number +

---

mammalian phenotype
        hematopoietic system phenotype
                abnormal hematopoietic system morphology/development
                        abnormal blood cell morphology/development
                                abnormal leukocyte morphology
                                        abnormal leukocyte cell number
                                                decreased leukocyte cell number
                                                        decreased lymphocyte cell number
                                                                decreased B cell number
                                                                        absent B cells +
                                                                        decreased immature B cell number [MP:0008215] (274 genotypes, 368 annotations)
                                                                                absent immature B cells +
                                                                                decreased pre-B cell number +
                                                                                decreased transitional stage B cell number +
                                                                        decreased mature B cell number +

---

mammalian phenotype
        hematopoietic system phenotype
                abnormal hematopoietic system morphology/development
                        abnormal blood cell morphology/development
                                abnormal leukocyte morphology
                                        abnormal mononuclear cell morphology
                                                abnormal lymphocyte morphology
                                                        abnormal B cell morphology
                                                                abnormal B cell differentiation
                                                                        abnormal immature B cell morphology
                                                                                abnormal pre-B cell morphology +
                                                                                abnormal transitional stage B cell morphology +
                                                                                absent immature B cells +
                                                                                decreased immature B cell number [MP:0008215] (274 genotypes, 368 annotations)
                                                                                        absent immature B cells +
                                                                                        decreased pre-B cell number +
                                                                                        decreased transitional stage B cell number +
                                                                                increased immature B cell number +

---

mammalian phenotype
        hematopoietic system phenotype
                abnormal hematopoietic system morphology/development
                        abnormal blood cell morphology/development
                                abnormal leukocyte morphology
                                        abnormal mononuclear cell morphology
                                                abnormal lymphocyte morphology
                                                        abnormal B cell morphology
                                                                abnormal B cell number
                                                                        decreased B cell number
                                                                                absent B cells +
                                                                                decreased immature B cell number [MP:0008215] (274 genotypes, 368 annotations)
                                                                                        absent immature B cells +
                                                                                        decreased pre-B cell number +
                                                                                        decreased transitional stage B cell number +
                                                                                decreased mature B cell number +

---

mammalian phenotype
        hematopoietic system phenotype
                abnormal hematopoietic system morphology/development
                        abnormal blood cell morphology/development
                                abnormal leukocyte morphology
                                        abnormal mononuclear cell morphology
                                                abnormal lymphocyte morphology
                                                        abnormal B cell morphology
                                                                abnormal immature B cell morphology
                                                                        abnormal pre-B cell morphology +
                                                                        abnormal transitional stage B cell morphology +
                                                                        absent immature B cells +
                                                                        decreased immature B cell number [MP:0008215] (274 genotypes, 368 annotations)
                                                                                absent immature B cells +
                                                                                decreased pre-B cell number +
                                                                                decreased transitional stage B cell number +
                                                                        increased immature B cell number +

---

mammalian phenotype
        hematopoietic system phenotype
                abnormal hematopoietic system morphology/development
                        abnormal blood cell morphology/development
                                abnormal leukocyte morphology
                                        abnormal mononuclear cell morphology
                                                abnormal lymphocyte morphology
                                                        abnormal lymphocyte cell number
                                                                abnormal B cell number
                                                                        decreased B cell number
                                                                                absent B cells +
                                                                                decreased immature B cell number [MP:0008215] (274 genotypes, 368 annotations)
                                                                                        absent immature B cells +
                                                                                        decreased pre-B cell number +
                                                                                        decreased transitional stage B cell number +
                                                                                decreased mature B cell number +

---

mammalian phenotype
        hematopoietic system phenotype
                abnormal hematopoietic system morphology/development
                        abnormal blood cell morphology/development
                                abnormal leukocyte morphology
                                        abnormal mononuclear cell morphology
                                                abnormal lymphocyte morphology
                                                        abnormal lymphocyte cell number
                                                                decreased lymphocyte cell number
                                                                        decreased B cell number
                                                                                absent B cells +
                                                                                decreased immature B cell number [MP:0008215] (274 genotypes, 368 annotations)
                                                                                        absent immature B cells +
                                                                                        decreased pre-B cell number +
                                                                                        decreased transitional stage B cell number +
                                                                                decreased mature B cell number +

---

mammalian phenotype
        hematopoietic system phenotype
                abnormal hematopoietic system morphology/development
                        abnormal blood cell morphology/development
                                abnormal leukocyte morphology
                                        abnormal mononuclear cell morphology
                                                abnormal lymphocyte morphology
                                                        abnormal lymphopoiesis
                                                                abnormal B cell differentiation
                                                                        abnormal immature B cell morphology
                                                                                abnormal pre-B cell morphology +
                                                                                abnormal transitional stage B cell morphology +
                                                                                absent immature B cells +
                                                                                decreased immature B cell number [MP:0008215] (274 genotypes, 368 annotations)
                                                                                        absent immature B cells +
                                                                                        decreased pre-B cell number +
                                                                                        decreased transitional stage B cell number +
                                                                                increased immature B cell number +

---

mammalian phenotype
        hematopoietic system phenotype
                abnormal hematopoietic system morphology/development
                        abnormal bone marrow cell morphology/development
                                abnormal myeloblast morphology/development
                                        abnormal mononuclear cell differentiation
                                                abnormal lymphopoiesis
                                                        abnormal B cell differentiation
                                                                abnormal immature B cell morphology
                                                                        abnormal pre-B cell morphology +
                                                                        abnormal transitional stage B cell morphology +
                                                                        absent immature B cells +
                                                                        decreased immature B cell number [MP:0008215] (274 genotypes, 368 annotations)
                                                                                absent immature B cells +
                                                                                decreased pre-B cell number +
                                                                                decreased transitional stage B cell number +
                                                                        increased immature B cell number +

---

mammalian phenotype
        immune system phenotype
                abnormal immune system morphology
                        abnormal immune system cell morphology
                                abnormal leukocyte morphology
                                        abnormal leukocyte cell number
                                                abnormal lymphocyte cell number
                                                        abnormal B cell number
                                                                decreased B cell number
                                                                        absent B cells +
                                                                        decreased immature B cell number [MP:0008215] (274 genotypes, 368 annotations)
                                                                                absent immature B cells +
                                                                                decreased pre-B cell number +
                                                                                decreased transitional stage B cell number +
                                                                        decreased mature B cell number +

---

mammalian phenotype
        immune system phenotype
                abnormal immune system morphology
                        abnormal immune system cell morphology
                                abnormal leukocyte morphology
                                        abnormal leukocyte cell number
                                                abnormal lymphocyte cell number
                                                        decreased lymphocyte cell number
                                                                decreased B cell number
                                                                        absent B cells +
                                                                        decreased immature B cell number [MP:0008215] (274 genotypes, 368 annotations)
                                                                                absent immature B cells +
                                                                                decreased pre-B cell number +
                                                                                decreased transitional stage B cell number +
                                                                        decreased mature B cell number +

---

mammalian phenotype
        immune system phenotype
                abnormal immune system morphology
                        abnormal immune system cell morphology
                                abnormal leukocyte morphology
                                        abnormal leukocyte cell number
                                                decreased leukocyte cell number
                                                        decreased lymphocyte cell number
                                                                decreased B cell number
                                                                        absent B cells +
                                                                        decreased immature B cell number [MP:0008215] (274 genotypes, 368 annotations)
                                                                                absent immature B cells +
                                                                                decreased pre-B cell number +
                                                                                decreased transitional stage B cell number +
                                                                        decreased mature B cell number +

---

mammalian phenotype
        immune system phenotype
                abnormal immune system morphology
                        abnormal immune system cell morphology
                                abnormal leukocyte morphology
                                        abnormal mononuclear cell morphology
                                                abnormal lymphocyte morphology
                                                        abnormal B cell morphology
                                                                abnormal B cell differentiation
                                                                        abnormal immature B cell morphology
                                                                                abnormal pre-B cell morphology +
                                                                                abnormal transitional stage B cell morphology +
                                                                                absent immature B cells +
                                                                                decreased immature B cell number [MP:0008215] (274 genotypes, 368 annotations)
                                                                                        absent immature B cells +
                                                                                        decreased pre-B cell number +
                                                                                        decreased transitional stage B cell number +
                                                                                increased immature B cell number +

---

mammalian phenotype
        immune system phenotype
                abnormal immune system morphology
                        abnormal immune system cell morphology
                                abnormal leukocyte morphology
                                        abnormal mononuclear cell morphology
                                                abnormal lymphocyte morphology
                                                        abnormal B cell morphology
                                                                abnormal B cell number
                                                                        decreased B cell number
                                                                                absent B cells +
                                                                                decreased immature B cell number [MP:0008215] (274 genotypes, 368 annotations)
                                                                                        absent immature B cells +
                                                                                        decreased pre-B cell number +
                                                                                        decreased transitional stage B cell number +
                                                                                decreased mature B cell number +

---

mammalian phenotype
        immune system phenotype
                abnormal immune system morphology
                        abnormal immune system cell morphology
                                abnormal leukocyte morphology
                                        abnormal mononuclear cell morphology
                                                abnormal lymphocyte morphology
                                                        abnormal B cell morphology
                                                                abnormal immature B cell morphology
                                                                        abnormal pre-B cell morphology +
                                                                        abnormal transitional stage B cell morphology +
                                                                        absent immature B cells +
                                                                        decreased immature B cell number [MP:0008215] (274 genotypes, 368 annotations)
                                                                                absent immature B cells +
                                                                                decreased pre-B cell number +
                                                                                decreased transitional stage B cell number +
                                                                        increased immature B cell number +

---

mammalian phenotype
        immune system phenotype
                abnormal immune system morphology
                        abnormal immune system cell morphology
                                abnormal leukocyte morphology
                                        abnormal mononuclear cell morphology
                                                abnormal lymphocyte morphology
                                                        abnormal lymphocyte cell number
                                                                abnormal B cell number
                                                                        decreased B cell number
                                                                                absent B cells +
                                                                                decreased immature B cell number [MP:0008215] (274 genotypes, 368 annotations)
                                                                                        absent immature B cells +
                                                                                        decreased pre-B cell number +
                                                                                        decreased transitional stage B cell number +
                                                                                decreased mature B cell number +

---

mammalian phenotype
        immune system phenotype
                abnormal immune system morphology
                        abnormal immune system cell morphology
                                abnormal leukocyte morphology
                                        abnormal mononuclear cell morphology
                                                abnormal lymphocyte morphology
                                                        abnormal lymphocyte cell number
                                                                decreased lymphocyte cell number
                                                                        decreased B cell number
                                                                                absent B cells +
                                                                                decreased immature B cell number [MP:0008215] (274 genotypes, 368 annotations)
                                                                                        absent immature B cells +
                                                                                        decreased pre-B cell number +
                                                                                        decreased transitional stage B cell number +
                                                                                decreased mature B cell number +

---

mammalian phenotype
        immune system phenotype
                abnormal immune system morphology
                        abnormal immune system cell morphology
                                abnormal leukocyte morphology
                                        abnormal mononuclear cell morphology
                                                abnormal lymphocyte morphology
                                                        abnormal lymphopoiesis
                                                                abnormal B cell differentiation
                                                                        abnormal immature B cell morphology
                                                                                abnormal pre-B cell morphology +
                                                                                abnormal transitional stage B cell morphology +
                                                                                absent immature B cells +
                                                                                decreased immature B cell number [MP:0008215] (274 genotypes, 368 annotations)
                                                                                        absent immature B cells +
                                                                                        decreased pre-B cell number +
                                                                                        decreased transitional stage B cell number +
                                                                                increased immature B cell number +

---

mammalian phenotype
        immune system phenotype
                abnormal immune system morphology
                        abnormal immune system cell morphology
                                abnormal leukopoiesis
                                        abnormal lymphopoiesis
                                                abnormal B cell differentiation
                                                        abnormal immature B cell morphology
                                                                abnormal pre-B cell morphology +
                                                                abnormal transitional stage B cell morphology +
                                                                absent immature B cells +
                                                                decreased immature B cell number [MP:0008215] (274 genotypes, 368 annotations)
                                                                        absent immature B cells +
                                                                        decreased pre-B cell number +
                                                                        decreased transitional stage B cell number +
                                                                increased immature B cell number +

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mammalian phenotype
        immune system phenotype
                abnormal immune system morphology
                        abnormal immune system cell morphology
                                abnormal leukopoiesis
                                        abnormal mononuclear cell differentiation
                                                abnormal lymphopoiesis
                                                        abnormal B cell differentiation
                                                                abnormal immature B cell morphology
                                                                        abnormal pre-B cell morphology +
                                                                        abnormal transitional stage B cell morphology +
                                                                        absent immature B cells +
                                                                        decreased immature B cell number [MP:0008215] (274 genotypes, 368 annotations)
                                                                                absent immature B cells +
                                                                                decreased pre-B cell number +
                                                                                decreased transitional stage B cell number +
                                                                        increased immature B cell number +

---