Ilioinguinal nerve entrapment during needle suspension for stress incontinence

The anatomy of the ilioinguinal nerve makes it vulnerable to entrapment near its exit from the superficial inguinal ring, where it lies almost directly superior to the pubic tubercle. During a 27-month period (December 1986 to March 1989), we encountered seven cases of ilioinguinal nerve entrapment following needle suspension procedures. In each case the diagnosis was made because of characteristic pain localized to the medial groin, mons, labia majora, and inner thigh. The intensity and character of the pain varied considerably, presumably depending on the time and degree of nerve compression. This paper discusses the resulting pain complex, diagnosis, pathophysiology, and options for prevention and treatment of this uncommon complication.