A 36-year-old man presented with lower back and right lower extremity pain for 10 years and right inguinal pain for 1 year. Magnetic resonance imaging showed a right sciatic nerve mass at the right ventral piriformis, causing sciatica and piriformis syndrome. The tumor was totally resected by a posterior approach. The postoperative histopathological diagnosis was schwannoma (World Health Organization grade 1). Immediately after the operation, his preoperative symptoms disappeared completely.
Key words: Intrapelvic sciatic nerve schwannoma, sciatica, piriformis syndrome.