An abdominal anomaly is a medical condition in which the organs or tissues of the abdomen are abnormally positioned. A HERNIA is one type of abdominal anomaly, in which an organ or tissue protrudes through the wall of the abdomen. Hernias can be caused by a variety of factors, including physical strain, obesity, and congenital defects. Treatment for hernias typically involves surgery to repair the weakened area of the abdominal wall.