Radiologic features of congenital transverse deficiency of the forearm

The records of fifteen patients (11 girls and 4 boys) with a congenital transverse deficiency of the forearm were studied. In 11 patients the lesion was on the left. The deficiency occurred in the proximal third of the forearm in 13 patients. The radius and the ulna were usually bowed, and their shafts were sometimes irregular. The radial head was dislocated in six patients, and minor abnormalities occurred in the distal humerus in five and the proximal ulna in five.