Elderly kendo (Japanese fencing) player with Kienböck's disease in one wrist and Preiser's disease in the other wrist: a case report.

Elderly patients suffering from avascular necrosis of a carpal bone in both wrists are extremely rare. We report a case of an elderly kendo (Japanese fencing) competitor who sustained Preiser's disease in the left hand following the occurrence of Kienböck's disease in the right hand. The current case demonstrates the importance of raising awareness of these diseases as potential sports-related problems in the elderly.