aorta hypoplasia aorta tubular hypoplasia narrow aortic lumen Hypoplasia in the term name is not necessarily consistent with usage in the rest of the ontology (underdevelopment vs narrowing of the lumen), but this is the term name used by cardiologists. a diffuse narrowing of the lumen of the aorta narrow aorta lumen aortic tubular hypoplasia MP:0010543 2010-10-04T09:28:50Z csmith MPheno.ontology