Hepatic hydrothorax: possible etiology of recurring pleural effusion.

A case of hepatic hydrothorax is presented as a reminder that a large, recurring pleural effusion may have an abdominal source, even in patients with minimal or no apparent ascites. One of the known mechanisms for hepatic hydrothorax is a peritoneopleural communication, as demonstrated in this case. A simple radionuclide imaging procedure, in which technetium 99m-sulfur colloid is injected into the peritoneal cavity prior to imaging of the chest and abdomen, can be used to document this finding. Treatment may include therapeutic thoracentesis, salt and water restriction, diuretics, tube thoracostomy with pleurodesis, surgical repair or placement of a portosystemic shunt.