title: Multiple sclerosis and oligodendroglioma: an exceptional association.
abstract: The cooccurrence of multiple sclerosis (MS) and oligodendroglioma is very rare. We present a 43-year-old male patient with the diagnosis of MS lasting for 14 years who developed seizures and right hemiparesis; cerebral MRI revealed an already known extensive lesion, previously misdiagnosed as tumefactive demyelinating lesion. Cerebral biopsy leads to oligodendroglioma diagnosis, successfully treated with radiotherapy. The diagnosis of a brain tumor in a MS patient is challenging. The atypical clinical and radiological features are the key for accurate diagnosis. In such cases, a brain tumor has to be kept in mind no matter how rare this association is.
authors.affiliation: Neurology Department, Centro Hospitalar Vila Nova Gaia/Espinho, 4434-502 Vila Nova de Gaia, Portugal ; MS Clinic, Neurology Department, Centro Hospitalar São João, 4440-563 Porto, Portugal.
authors.forename: Ana Teresa
authors.identifier: 0000-0002-1492-6504
authors.initials: AT
authors.lastname: Carvalho
authors.affiliation: Neurosurgery Department, Centro Hospitalar São João, 4440-563 Porto, Portugal ; Faculty of Medicine of Porto University, 4200-319 Porto, Portugal.
authors.forename: Paulo
authors.initials: P
authors.lastname: Linhares
authors.affiliation: Faculty of Medicine of Porto University, 4200-319 Porto, Portugal ; Pathological Anatomy Department, Centro Hospitalar São João, 4440-563 Porto, Portugal.
authors.forename: Lígia
authors.initials: L
authors.lastname: Castro
authors.affiliation: MS Clinic, Neurology Department, Centro Hospitalar São João, 4440-563 Porto, Portugal ; Faculty of Health Sciences, Fernando Pessoa University, 4249-004 Porto, Portugal.
authors.forename: Maria José
authors.initials: MJ
authors.lastname: Sá