Hepatic myelolipoma in a peritoneopericardial diaphragmatic hernia in a cat: case report

Abstract

A 10.5-year-old cat was received with sudden anorexia and dyspnea. Ultrasonographic examination of the thoracic cavity revealed that the heart was compressed by a mass on its right aspect. At necropsy, a peritoneo-pericardial diaphragmatic hernia was found, and a portion of the liver and omentum were found within the pericardial sac. Histopathology of the herniated liver revealed the presence of a neoplastic mass characterized by numerous adipocytes, myeloid and erythroid progenitor cells including megakaryocytes and bone spicules (myelolipoma). Peritoneo-pericardial diaphragmatic herniation of the liver is usually an asymptomatic congenital defect in cats. It is considered as an incidental finding and it is frequently associated with hepatic myelolipoma in feline species.