[Angiosarcoma of the liver and pineal region]

Angiosarcoma is a rare malignant tumor originating from vascular endothelial cells. We have experienced a case of 17-year-old man, who had angiosarcoma in the pineal region and the liver. Patient's initial symptom was headache and CT scan revealed a high density mass in the pineal region with obstructive hydrocephalus. After the radiation therapy, the tumor was disappeared completely on CT scan. One year later, he developed abdominal pain, and CT scan and angiogram revealed multiple angioma like lesions in the liver. The mass in the pineal region showed concomitant regrowth, and finally, the patient was died of abdominal hemorrhage. At autopsy, pineal tumor and hepatic tumor were both angiosarcomas, although it was uncertain which was the original tumor.