Hernia through the foramen of Winslow

A case of hernia through the foramen of Winslow diagnosed preoperatively is reported. Although the preoperative diagnosis is difficult to make because of the nonspecific symptoms presented and the rarity of the disease, careful evaluation of the plain abdominal X-ray and barium enema study gave the clue in the present case. Review of the literature including those from Japan revealed 115 cases up to 1976, of which diagnosis was established preoperatively in 11 cases.