EFO_1001866 (ventral hernia) is a hernia caused by weakness of the anterior ABDOMINAL WALL due to midline defects, previous incisions, or increased intra-abdominal pressure. Ventral hernias include UMBILICAL HERNIA, incisional, epigastric, and spigelian hernias. Also known as: Hernia, Ventral, hernia of anterior abdominal wall.