Bicompartmentalization of the radiocarpal joint.
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.
Mallinckrodt Institute of Radiology, Washington University School of Medicine, St. Louis MO 63110-1076, USA.
H
H
Ono
L A
LA
Gilula
M W
MW
Marzke
W R
WR
Obermann
D000328:Adult; D002348:Carpal Bones / Q000002:abnormalities* / Q000000981:diagnostic imaging; D005260:Female; D006801:Humans; D008023:Ligaments, Articular / Q000002:abnormalities* / Q000000981:diagnostic imaging; D008297:Male; D011859:Radiography; D012189:Retrospective Studies; D014955:Wrist Joint / Q000002:abnormalities* / Q000000981:diagnostic imaging