Hernia rear of the diaphragm may be false, and, much more rarely, transient. Entrance gate hernia is a slit-like aperture in the wall surface defect lumbocostal department (Bogdaleka gap). In 85-90% of cases it occurs on the left. The defect can have different sizes, and the smaller the defect, the more pronounced is the muscle of the roller aperture residues on its costal margin. Usually roller is well expressed at the rear edge of the costal arch and disappears in the side part.