RARE INTRACRANIAL PLASMACYTOMAS

Plasmacytomas can be divided into multiple, solitary osseous and solit ary extraosseous/extramedullary plasmacytomas. Intracranial plasmacyto mas of the dura, leptomeninx and cerebrum are well known from the lite rature. They are manifestations of multiple myeloma, intracranial extr amedullary plasmacytoma or metastatic disease of extramedullary plasma cytoma in distant locations. We describe a cerebellar manifestation of a solitary plasmacytoma of the bone, and a leptomeningeal carcinomato sis of a multiple plasmacytoma. A summary of the literature concerning intracranial plasmacytomas is given. Dural manifestations of plasmacy toma have the same features as meningiomas in CT or MRI. Cerebral or c erebellar manifestations cannot be differentiated from brain tumors by means of CT or MRI. In CT, plasmacytomas show high-density lesions. T 2w-MRI reveals a low-intensity lesion. In T1w-MRI, intense homogeneous contrast enhancement can be demonstrated.