title: Congenital vein valve aplasia.
mesh_terms: D000328:Adult; D002648:Child; D005260:Female; D006801:Humans; D008297:Male; D010375:Pedigree; D014680:Veins / Q000002:abnormalities*; D014689:Venous Insufficiency / Q000209:etiology / Q000503:physiopathology