Zancolli rerouting of biceps tendon for supination deformity of forearm. A, 1, Dorsal skin incision (dotted line) is extended distally to a when distal radioulnar joint requires capsulotomy. 2, Anterior incision to expose biceps tendon and radial head. B, Exposure of interosseous membrane by retracting dorsal muscles radially (see text). C, Line at b shows Z-plasty incision to be made in biceps tendon. Interosseous membrane has been divided at a. D, At c, biceps tendon has been divided by Z-plasty, distal segment has been rerouted around radial neck medially, and ends of tendon are being sutured together. Traction on tendon will now pronate forearm as indicated by arrow. SEE TECHNIQUE 34.29.