Lipoma of the Tendon Sheath in the Fourth Extensor Compartment of the Hand.

Lipoma of an extensor tendon compartment is an exceedingly rare tumor of the hand. Although benign, it can often cause localized pain and finger stiffness, necessitating surgical excision. We report a case of a lipoma of the tendon sheath in the fourth dorsal compartment of the hand that was successfully treated with surgical excision.