Extraarticular chondromatosis of the hand. A case report.

We present an uncommon case of large nonarticular chondromatosis of the hand. Some of the foci were found to cause compression of the median nerve, the ulnar artery, and also triggering of the third finger. The fourth lumbrical muscle was involved as well. A thorough, but not complete, excision with preservation of the median nerve and ulnar artery was performed. No recurrence was found during 5 years of follow-up.