title: Absence of the inferior vena cava.
mesh_terms: D000293:Adolescent; D001401:Azygos Vein / Q000002:abnormalities*; D006328:Cardiac Catheterization; D003937:Diagnosis, Differential; D006801:Humans; D008297:Male; D013908:Thoracotomy; D014682:Vena Cava, Inferior / Q000002:abnormalities*