Cahill and Palmer technique. A, Skin incision. B, Retractor placed under border of deltoid. C, Teres minor is held by suture on left, with circular area on right representing insertion of teres minor. Clamp holds fibrous bands traversing quadrilateral space that tether neurovascular bundle. Deltoid is reflected to right. D, Dissection is complete, with fibrous bands dissected away from neurovascular bundle. (Redrawn from Cahill BR, Palmer RE: Quadrilateral space syndrome, J Hand Surg 8[1]:65–69, 1983.) SEE TECHNIQUE 46.6.