Sciatic Nerve Schwannoma: A Case Report

Sciatic nerve schwannomas are rare benign peripheral nerve sheath tumors. Their clinical presentation is most commonly characterized by neuropathic pain or sciatica, whereas sensory and motor deficits are uncommon. We report the case of a 38-year-old man who presented with a long-standing history of paresthesia involving the posterior aspect of the right thigh. Clinical examination revealed a positive Tinel's sign along the course of the sciatic nerve. Magnetic resonance imaging (MRI) demonstrated a well-defined rounded mass measuring 92 × 90 mm with a craniocaudal extent of 150 mm, closely related to the sciatic nerve. An open biopsy was performed, and histopathological examination was consistent with a schwannoma. The patient subsequently underwent complete surgical excision of the tumor with preservation of the sciatic nerve. The postoperative course was uneventful, with complete resolution of pain, and the final histopathological examination confirmed the diagnosis of sciatic nerve schwannoma.