A combination of liver disease, decreased arterial oxygen concentration, and dilatation of the blood vessels of the lung. Clinically the patient may have signs and symptoms of liver disease, including gastrointestinal bleeding, esophageal varices, ascites, palmar erythema, and splenomegaly. Pulmonary signs include clubbing of the fingers, cyanosis, dyspnea, and decreased arterial oxygen concentration while in an upright position (orthodeoxia).