Budd Chiari syndrome from myosarcoma of right atrium.

A 50-year-old man presented with abdominal pain followed by marked liver and renal dysfunction. Although liver scan appearances were not diagnostic, at laparotomy a tense, enlarged liver was found with thrombosis of the inferior vena cava. Despite full supportive measures the patient died within a month of laparotomy. Subsequent necropsy confirmed the diagnosis of Budd Chiari syndrome and revealed the primary cause to be a myosarcoma of the right atrium, an occurrence hitherto unreported.