Botulinum toxin A injection of the obturator internus muscle for chronic perineal pain

Chronic perineal pain is often a difficult condition to manage. Current treatments include pudendal nerve injections and pudendal nerve release surgery. The obturator internus muscle has a close relationship to the pudendal nerve and might be a potential target for therapeutic intervention. Perspective:A case is presented of refractory perineal pain that was successfully treated by injecting the obturator internus muscle with botulinum toxin A. (c) 2005 by the American Pain Society.