Malignant melanoma metastatic to a meningioma

The case presented is that of a 63 year old man with a metastasis to an int racranial meningioma from a malignant melanoma. Although the phenomenon of tumor to tumor metastasis to a meningioma has been previously reported, thi s is the first case in the literature to date, in which the primary tumor i s a malignant melanoma. The criteria for the diagnosis of tumor-to-tumor me tastasis and possible reasons for the frequency of metastasis to meningioma s are briefly reviewed.