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Compression of the ulnar nerve in the hand by a ganglion. Report of a case.

Ganglia in the hand are uncommon, and compression of a nerve by such a lesion is rare . We are reporting a case of atrophy of the first dorsal interosseus and adductor pollicis muscles due to compression of the distal portion of the deep palmar branch of the ulnar nerve by a ganglion. There are two good reviews of other lesions reported to cause this syndrome of compression of the ulnar nerve 1,3