abnormal descending thoracic aorta morphology 2009-12-15T10:44:36Z MA:0002572 MP:0009868 MPheno.ontology any structural anomaly of the part of the aorta that extends from the arch of the aorta to the diaphragm, and from which arises numerous branches that supply oxygenated blood to the chest cage and the organs within the chest csmith abnormal descending aorta morphology abnormal thoracic aorta morphology