skeleton
• the detachment of the ribs of T7 from the sternum, representing an anterior shift of the sternum of one segment width
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• the formation of an additional ossification center in the sternum
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• 75% exhibit T1 to T2 transformation
• 50% exhibit T13 to L1 transformation
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• 45% exhibit C7 to T1 transformation, and showed ectopic ribs associated with C7 mimicking perfect ribs and forming joints with the anteriorly shifted sternum
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• 100% exhibit an L6 to S1 transformation
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