A new anatomical and surgical landmark in internal abdominal oblique muscle: fat triangle.

PURPOSE To determine the anatomical landmark within the internal oblique muscle. MATERIALS AND METHODS In a prospective study, the abdominal wall was examined for internal oblique muscle land marks in 900 patients undergoing laparatomy. RESULTS There was a fat line at anterior superior iliac spine level to access the underlying layers and then to the abdominal cavity. CONCLUSION A fat triangle within the internal oblique muscle provides a suitable region of surgical incision at the lower part of the abdominal wall.