Persistent groin pain following a trans-obturator sling procedure for stress urinary incontinence: a diagnostic and therapeutic challenge.

Groin pain after a tension-free vaginal tape-obturator (TVT-O) procedure can occur but mostly disappears within 4 weeks. Persistent groin pain is extremely rare and there is a paucity of literature on how to diagnose and manage this adverse event. We present two cases with severe persistent groin pain after uncomplicated TVT-O, in which magnetic resonance imaging and electromyography did not reveal the cause. We concluded that the tape entrapped or cut through peripheral branches of the obturator nerve. We removed as much of the tape as possible in both cases. Removal partially relieved the pain although sensory loss of the obturator nerve persisted 1 year after surgery. In case of abnormal post-operative groin pain, soon removal of the tape enhances the chance that damage to the obturator nerve is reversible, although it is important to counsel patients with similar pathology that recovery can take long and may be only partial.