Abstract
Primary hepatic angiosarcoma (PHA) is rare, does not possess any characteristic tumor markers, is primarily observed in the elderly, and often presents with nonspecific symptoms, including discomfort or distension of the abdomen, weight loss and fatigue. Thus, PHA is difficult to diagnose, particularly if the patient presents no history of exposure to carcinogens, and its definitive diagnosis requires histological examination following surgery. Patients with PHA present poor long-term survival, and surgical resection of the tumor is currently the best treatment option for PHA. In the present report, the case of a 64-year-old man initially diagnosed with hydatid cyst, who was subsequently diagnosed with a giant PHA in the middle of the liver, is described. Further studies are required to investigate the diagnosis and treatment of PHA.