Multiple Myeloma with intracranial plasmacytoma.

We present a case of a 43-year-old male who was found to have an intracranial mass lesion on headache imaging. On further follow up, the patient developed systemic features of hypercalcemia, anemia and renal dysfunction. The biopsy of the mass was negative multiple times. A bone marrow biopsy was done due to high suspicion of multiple myeloma which showed plasma cell infiltration of the bone marrow. The patient's serum was however negative for an M band with only a narrow M band in the urine suggestive of oligosecretory multiple myeloma.