We report a case of adjacent intracranial tumours: malignant fibrous histio
cytoma (MFH) and meningioma. Thallium-201 single-photon emission computed t
omography demonstrated different thallium kinetics between the tumours (slo
w washout from the MFH and rapid clearance in the meningioma) and could be
said to have been useful for preoperative histological estimation.