Median nerve Schwannoma. A case report and review of the literature

Background: Background: Schwannomas are benign peripheral nerve sheath tumors that can arise from any cranial or peripheral nerve. Median nerve schwannomas in the distal forearm or wrist are rare and may mimic other soft‑tissue lesions, causing diagnostic delays. Case Report: An 83‑year‑old male presented with a 3‑year history of a slowly enlarging, painless mass in the distal volar forearm, associated with intermittent paresthesias in all fingers of the right hand. Imaging (ultrasound and CT angiography) revealed a well‑defined, oval mass dependent on the median nerve. The patient underwent complete tumor excision with resection of the involved nerve segment at the Oncology Hospital of the National Medical Center “Siglo XXI” (Mexico City, Mexico). Histopathological analysis confirmed a schwannoma measuring 2.0 × 2.0 cm, completely resected with free margins. The postoperative course was uneventful. Conclusions: Median nerve schwannomas are uncommon and should be considered in the differential diagnosis of forearm masses with neurological symptoms. Imaging is essential for preoperative planning, and complete resection is curative, although functional deficits are expected when nerve sacrifice is required. Keywords: Median nerve, schwannoma, peripheral nerve sheath tumor, forearm mass, case report