The clinical and radiologic spectrum of symbrachydactyly has been extended,
on the basis of experimental embryology, into four categories: typical sym
brachydactyly, atypical cleft hand, monodactyly, and adactyly. The origin o
f this embryologic failure is probably a vascular disruption. A series of 6
4 hands and 3 feet are reported, indicating associated anomalies and possib
le etiologic features.