,r; 330 THE JOURNAL OF BONE AND JOINT SURGERY AN UNUSUAL CAUSE OF CARPAL TUNNEL SYNDROME A Case of Thrombosis of the Median Artery

Compression of the median nerve as it lies in the carpal tunnel can be caused by many lesions. Entin (1968) grouped them into three categories: those reducing the capacity of the tunnel, those increasing the volume of its contents, and those that form part of a systemic condition. Recently a case of the syndrome presented which fell into the second grouping: the cause was unusual and a search ofthe literature has failed to reveal any reports ofa similar condition. CASE REPORT A man aged thirty-seven years was admitted for excision of a pleomorphic salivary adenoma of the soft palate. His occupation, cooper, is extremely heavy, calling for almost constant power movements of upper limbs and hands. During his general examination h