An obturator hernia
is a rare type of abdominal wall hernia
in which abdominal content protrudes through the obturator foramen
. Because of differences in anatomy, it is much more common in women than in men, especially multiparous and older women who have recently lost a lot of weight. It often presents with bowel obstruction
. The Howship-Romberg sign
is suggestive of an obturator hernia, exacerbated by thigh extension, medial rotation and adduction. It is characterized by lancilating pain in the medial thigh/obturator distribution, extending to the knee; caused by hernia compression of the obturator nerve.