April 2014

A case of intrapelvic sciatic nerve schwannoma presenting as piriformis syndrome

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)....

Author(s): Koshi Ninomiya, Koichi Iwatsuki, Yu-ichiro Ohnishi, Takashi Moriwaki and Toshiki Yoshimine