Intraneural perineurioma of the median nerve at the elbow: A clinical case

A 31-year-old female patient presented with swelling on the anteromedial aspect of her right elbow with a sensory deficit in the median nerve territory. Biopsies led to the diagnosis of intraneural perineurioma (INP). Surgical excision was performed and followed by an intercalary graft. INP is a rare benign tumor of the peripheral nerves characterized by a multiplication of perineural cells invading the endoneurium. This lesion is often unknown, under-diagnosed, and its treatment is poorly defined. Few cases have been described in the literature; the majority involve the median nerve at the wrist and no references have been found about its localization to the median nerve at the elbow.