A case of metastasis from a colon carcinoma to an intracranial oligodendroglioma

: The following case of a metastasis from a colon carcinoma to an intracranial oligodendroglioma is reported. Radiologically, it was difficult to diagnose that the colon carcinoma had metastasized to an oligodendroglioma. A craniotomy was then performed. Histologically, it was diagnosed that the tumor was a moderately differentiated adenocarcinoma and oligodendroglioma. Also, in conclusion, a comparison of Japanese and foreign cases of metastasis from tumor to tumor is reviewed.