abnormal foregut morphology absent foregut 2013-09-13T09:54:53Z MP:0012083 MPheno.ontology absence of the anterior portion of the primitive digestive tube of the embryo that lies cephalic to the junction of the yolk stalk, consists of endodermal tissue, and gives rise to the pharynx, lower respiratory system, esophagus, stomach, duodenum proximal to the biliary tract, liver, pancreas, biliary tract, and gall bladder csmith foregut agenesis missing foregut