MR-IMAGING OF MULTIPLE-SCLEROSIS SIMULATING BRAIN-TUMOR

Multiple sclerosis may sometimes present as a mass lesion that is indi stinguishable from brain tumor both clinically and radiologically. We describe two cases of multiple sclerosis simulating brain tumor on com puted tomography (CT) scans and magnetic resonance (MR) images, one of which was proved and another was suggestive to be demyelinating disea se by biopsy. Steroid therapy produced regression of the lesions of MR images and CT scans. Our cases and others in the literature suggest s trategies for detecting multiple sclerosis presenting as a mass lesion .