The supine hypotension syndrome in a young boy.
D000008:Abdominal Neoplasms / Q000150:complications* / Q000601:surgery; D000293:Adolescent; D000768:Anesthesia, General / Q000379:methods*; D001012:Aorta, Abdominal / Q000473:pathology; D003251:Constriction, Pathologic / Q000209:etiology; D006801:Humans; D007024:Hypotension, Orthostatic / Q000209:etiology*; D008297:Male; D011187:Posture; D013577:Syndrome; D014682:Vena Cava, Inferior / Q000473:pathology