Ono H, Gilula L A, Marzke M W, Obermann W R
Mallinckrodt Institute of Radiology, Washington University School of Medicine, St. Louis MO 63110-1076, USA.
J Hand Surg Am. 1996 Sep;21(5):788-93. doi: 10.1016/S0363-5023(96)80193-6.
Seven wrists are presented with a septum connecting the lunotriquetral interosseous ligament and triangular fibrocartilage, resulting in bicompartmentalization of the radiocarpal joint. In all of the 7 wrists, having no history of trauma, the septums were suspected to be of congenital origin. The histopathology of the septum in 1 cadaver wrist showed a fibrocartilaginous structure. Two types of radiocarpal joint bicompartmentalization were identified by arthrography. Type 1 (2 wrists) had a septum with normal (intact) lunotriquetral interosseous ligament, and type 2 (5 wrists) had a septum with a communicating defect of the lunotriquetral interosseous ligament. The septum is most likely a congenital malformation caused by a disturbance of the vacuolization of the mesenchymal mass between the forearm and carpus.
