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Rehabilitation Practice and Science

Abstract

Lipomas are benign tumors that are common in subcutaneous tissue and are usually asymptomatic. However, intramuscular lipomas, which are less common, can cause nerve compression in rare cases. Herein, we report the case of a 61-year-old man with an intramuscular lipoma on his right forearm. The lipoma entrapped the deep branch of the radial nerve and caused wrist drop and finger drop. A nerve conduction examination and electromyography were conducted to quantify the degree of and localize the nerve injury. Sonography provided the initial diagnosis of a lipoma, which was verified with magnetic resonance imaging. The lipoma was resected, and the patient had a favorable recovery. Neuromusculoskeletal sonography is useful because of its accessibility. Clinicians should perform ultrasound initially when structural lesions are present to determine whether they are causing nerve entrapment. This can aid in the preliminary determination of the etiology, reveal anatomical relations with surrounding structures, and support surgical decisions to ensure that diagnosis and treatment are not delayed.

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