Carpal tunnel lipoma

Case contributed by Dr Mauricio Macagnan

Presentation

Paresthesia of the hand.

Patient Data

Age: 45
Gender: Female
MRI

Expansive lesion located on the wrist, on the lateral side, on the topography of the ulnar neurovascular bundle extending from the base level of the metacarpals to the proximal third of the ulna diaphysis. The lesion locates superficially to the adductor muscle of the little finger in its distal aspect, extending proximally within the carpal tunnel to the level of the distal third of the ulna, between the tendons of the superficial flexor of the fingers and the deep tendon.

The lesion has a fat-like signal intensity and has a thin fibrous capsule with an appearance suggestive of lesion of lipomatous origin.

Case Discussion

A lipoma is a tumor of adipose cell origin, benign and relatively frequent.  However, it is rarely located in the hand representing 1-3.8% of the benign tumors in the hand. A lipoma of the hand that causes a carpal tunnel syndrome by the median nerve compression is extremely rare.

 

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Case information

rID: 53578
Case created: 24th May 2017
Last edited: 22nd Jun 2017
Inclusion in quiz mode: Included

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