9 553.3 , 750.6 OMIM 142400 DiseasesDB 29116 eMedicine med/1012 radio/337 MeSH D006551 Hiatal Hernia A hiatus hernia or hiatal hernia is the protrusion (or herniation ) of the upper part of the stomach into the thorax through a tear or weakness in the diaphragm . Symptoms The symptoms include acid