Unusual Nerve Compression Secondary to Intermuscular Lipoma: A Case Report

Background: This report presents the case of a 68-year-old male patient with a 3-month history of progressive weakness of the left hand accompanied by symptoms of pain and dysesthesia radiating to the dorsal aspect of the forearm. Case Report: Complete compression of the radial nerve and partial entrapment of the ulnar nerve secondary to the intermuscular lipoma were detected. Electromyography findings revealed prolonged motor and sensory latency of the radial nerve and reduced sensory conduction velocity in the distribution of the ulnar nerve. The pathological findings revealed nuclear atypia with no increased mitosis, hyperchromasia, pleomorphism, or multinucleation of fat cells. Total surgical excision of the intermuscular lipoma was performed with an anterior surgical approach. Optimal functional improvement in hand extension had been achieved at a 1-year follow-up evaluation. Conclusion: Clinicians should be aware of the possibility of the entrapment of adjacent peripheral nerves by an intermuscular lipoma and its clinical and pathological manifestations.