Ulnar ray deficiency. A report of a family

We report three cases of ulnar ray deficiency in one family. The father had a left ring finger deficit, and a hypoplastic little finger was amputated at childhood. His first baby had a deep cleft between the ring and little finger in the right hand, and his second baby had complete absence of the left ulna, only one metacarpal, and two digits were present on the hand. All three cases were unilaterally involved and they had no other skeletal abnormalities.