Neuropathy After Herniorrhaphy: Indication for Surgical Treatment and Outcome

Background: Chronic neuropathy after hernia repair is a neglected problem as very few patients are referred for surgical treatment. The aim of the present study was to assess the outcome of standardized surgical revision for neuropathic pain after hernia repair. Methods: In a prospective cohort study we evaluated all patients admitted to our tertiary referral center for surgical treatment of persistent neuropathic pain after primary herniorrhaphy between 2001 and 2006. Diagnosis of neuropathic pain was based on clinical findings and a positive Tinel's sign. Postoperative pain was evaluated by a visual analogue scale (VAS) and a pain questionnaire up to 12months after revision surgery. Results: Forty-three consecutive patients (39 male, median age 35years) underwent surgical revision, mesh removal, and radical neurectomy. The median operative time was 58min (range: 45-95min). Histological examination revealed nerve entrapment, complete transection, or traumatic neuroma in all patients. The ilioinguinal nerve was affected in 35 patients (81%); the iliohypogastric nerve, in 10 patients (23%). Overall pain (median VAS) decreased permanently after surgery within a follow-up period of 12months (preoperative 74 [range: 53-87] months versus 0 [range: 0-34] months; p