Neurilemmoma of deep branch of ulnar nerve presenting as ulnar tunnel syndrome.

A rare case of neurilemmoma of the deep branch of the ulnar nerve presented as ulnar nerve compression syndrome. This tumour was arising from the deep branch at the wrist just distal to the ulnar tunnel. By its proximity to the sensory division, it led to sensory symptoms in the ulnar two digits. Certain features of this case, which are uncommon are discussed.