[The interesting case: schwannoma of the nervus pudendus after triple pelvic osteotomy according to toennis].

Schwannomas (neurilemmomas) are benign neural sheath tumours which commonly arise from cranial nerves and cutaneous nerves of the head and neck. The most common site is the acoustic neuroma of the 8th cranial nerve. Pelvic schwannomas are rare and often present with non-specific symptoms leading to misdiagnosis and prolonged morbidity. Most cases of pelvic schwannoma have been reported in the gynaecological and urological literature due to their presentation as a pelvic mass or from urinary tract compression. We present a schwannoma of the nervus pudendus with clinical, radiological, MRI scan and intraoperative findings together with a description of the technique of surgical resection.