Teaching point: Unexplained persistent perineal pain poses a differential diagnosis, including pelvic nerve lesions. The rare occurrence of pelvic schwannoma is easily shown by a MRI as a T2-hyperintense enhancing mass.
Chiabai, O., Marbaix, E., & Dragean, C. (2022). Schwannoma: A Rare Cause of Perineal Pain. Journal of the Belgian Society of Radiology, 106(1), 8 [1-3]. https://doi.org/10.5334/jbsr.2738 (Original work published 2022)