Management of cerebral mass effect lesions in multiple sclerosis.

We present three cases of multiple sclerosis (MS) with tumoural manifestation during the disease in two cases, and as the first symptom in one case. Surgery is the first option, when a new patient presents with clinical features suggestive of a brain tumour. When an MS patient presents with these symptoms, corticoid treatment should be initiated and only if mass effect in computerized tomography (CT) persists, should surgery be considered.