Fusion of the centers of the triquetral and lunate (the 0s lunatotriquetrum) was observed in 1.6% of 7,543 subjects primarily of African origin as compared with 0.1% of 11,663 persons of European origin. The fusion was twice as common in females as in males, multifactorial inheritance was suggested in the lineages studied, and a possible selective disadvantage was postulated after comparison wi...

Rowan CH, Downing ND. BMJ Case Rep 2017. doi:10.1136/bcr-2017-221041 Description Perilunate dislocations are uncommon high-energy injuries which are missed in approximately 25% of cases on initial presentation. We present the X-rays of a 25-year-old man who fell from a height of approximately 2 metres onto an extended wrist. Plain radiographs (figure 1) show classical signs of a trans-scaphoid ...

CASE DESCRIPTION A 6-year-old neutered female mixed-breed dog was evaluated because of a 6-week history of left forelimb lameness that varied in severity. CLINICAL FINDINGS Radiography revealed expansile and lytic changes of the left accessory carpal bone (ACB). Results of histologic evaluation of ACB core biopsy specimens indicated areas of bone necrosis. The entire left ACB was excised and ...

Being a carpal bone scaphoid has an important role in wrist movements. Wrist joint is a synovial modified ellipsoid joint where movements like flexion, extension and adduction, abduction take place around two axes (transverse and anteroposterior). These movements at the wrist joint are associated with considerable range of movements at the midcarpal joint, as same group of muscles act on both o...

Carpal dislocation and fracture dislocation are uncommon and difficult to treat. Early diagnosis and treatment of such injuries are necessary to prevent progressive carpal instability and traumatic arthritis. Perilunate fracture dislocation is a combination of ligamentous and osseous injuries that involve the 'greater arc' of the perilunate. Despite being severe, these injuries often go unrecog...

Abstract Background Treatment of post-traumatic osteochondral defects in the radiocarpal and distal radioulnar joint with nonvascularized metatarsal articular bone grafting is an option to restore (cartilage) surface wrist function. Purpose To evaluate clinical midterm results 10 consecutive patients who were treated a graft for cartilage lunate facet, scaphoid sigmoid notch, or radial part uln...

Perilunate and perilunate fracture dislocations are high-energy injuries with the wrist loaded in extension, ulnar deviation, and intercarpal supination. The force vector travels from a radial to a ulnar direction and can result in complex carpal instability. The diagnosis is often delayed, which can result in suboptimal outcomes. Nonoperative management can produce inferior results, with patie...

This article describes a case of a 24-year-old man with a total volar extrusion of the lunate and scaphoid proximal pole with concurrent scapholunate dissociation. The viability of the lunate and the proximal pole of the scaphoid are at high risk in this type of injury. Scaphoid nonunion, avascular necrosis of the lunate and proximal pole of the scaphoid, and carpal instability are inevitable u...