title: Hepatopulmonary syndrome can show spontaneous resolution: possible mechanism of portopulmonary hypertension overlap?
abstract: Hepatopulmonary syndrome (HPS) (hypoxaemia due to intrapulmonary vasodilation and a right-to-left shunt associated with liver disease) resolves after liver transplantation. The authors describe a case of spontaneous resolution of HPS prior to liver transplantation. This patient was diagnosed with HPS associated with extra-hepatic biliary atresia when she was 10 years old. She exhibited digital clubbing, facial vascular dilation, cyanosis, and suffered from dyspnoea during exercise. The patient's PaO(2) at rest was 53.8 mm Hg in room air and a Technetium-99m macro-aggregated albumin lung perfusion scan demonstrated a right-to-left shunt. Although her symptoms and laboratory data supported a diagnosis of HPS, she nevertheless showed spontaneous resolution within 2 years. When she was 14 years old, pulmonary hypertension was evident upon examination of her echocardiogram. HPS may be improved or masked by an accidental overlap with pulmonary hypertension in the terminal stage of liver disease.
authors.affiliation: Department of Interdisciplinary Medicine, National Center for Child Health and Development, Tokyo, Japan. aumeda@hf.catv.ne.jp
authors.forename: Akira
authors.initials: A
authors.lastname: Umeda
authors.forename: Manabu
authors.initials: M
authors.lastname: Tagawa
authors.forename: Takao
authors.initials: T
authors.lastname: Kohsaka
authors.forename: Tomoo
authors.initials: T
authors.lastname: Miyakawa
authors.forename: Kazuteru
authors.initials: K
authors.lastname: Kawasaki
authors.forename: Masayuki
authors.initials: M
authors.lastname: Kitamura
authors.forename: Miwako
authors.initials: M
authors.lastname: Nakano
mesh_terms: D000293:Adolescent; D001656:Biliary Atresia / Q000150:complications; D005260:Female; D048550:Hepatic Insufficiency / Q000150:complications* / Q000601:surgery*; D020065:Hepatopulmonary Syndrome / Q000000981:diagnostic imaging / Q000209:etiology / Q000503:physiopathology*; D006801:Humans; D006975:Hypertension, Portal / Q000503:physiopathology*; D006976:Hypertension, Pulmonary / Q000503:physiopathology*; D016031:Liver Transplantation; D018810:Magnetic Resonance Angiography; D011877:Radionuclide Imaging; D012075:Remission, Spontaneous