General Considerations
Osteonecrosis of the carpal lunate.
Clinical Features
Males 9:1; 20-40 years of age.
History of acute or chronic trauma.
Worsening pain and disability.
Pathologic Features
Avascular necrosis; resorption, deposition, fragmentation, collapse.
Cause obscure, possibly owing to trauma, vascular vulnerability, and a short ulna.
Radiologic Features
Increased density, lucent areas, articular collapse, decreased size of the lunate.
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