Thorotrast-associated hepatic leiomyosarcoma and cholangiocarcinoma in a single patient

A 66-year-old man developed two distinct primary malignant hepatic neoplasms (leiomyosarcoma and cholangiocarcinoma) 50 years after Thorotrast administration. This is the first case report of Thorotrast-associated primary hepatic leiomyosarcoma. Ultrastructural and immunohistochemical studies are discussed.