nonsyndromic congenital nail disorder 4 (DOID:0080082)
Alliance: disease page
Synonyms: anonychia congenita; HYPONYCHIA CONGENITA
Alt IDs: OMIM:206800, MESH:C536377
Definition: A nonsyndromic congenital nail disorder that is characterized by complete absence or severe hypoplasia of all fingernails and toenails without significant bone anomalies, and that has_material_basis_in homozygous or compound heterozygous mutation in the R-spondin-4 gene on chromosome 20p13.