[Liver metastasis of thymoma--report of two cases]

We experienced two cases of liver metastasis resulting from thymoma, which is reported to be rare in Japan. Case 1 was a 57-year-old man who was admitted because of hepatomegaly. US, CT and angiography revealed multiple tumors in the liver which were thought to be liver metastasis from an unknown origin. He died of cardiac tamponade one year later. An autopsy revealed thymoma with metastasis to the liver, lung and pericardium. Case 2 was a 32-year-old female who visited our hospital complaining of right hypochondriac pain, US detected several large hyperechoic masses in the liver. A us-guided liver biopsy confirmed metastasis from thymoma. Histological tests of the liver of these two cases showed epithelial type of thymoma.