Presentamos el caso de un paciente varón de 54 años que acude a Urgencias por cefalea importante de 6 días de evolución así como por una disfasia nominal ocasional. No presentaba anosmia ni otra sintomatología. El TAC urgente y la RM craneal posterior muestran una gran tumoración extra-axial frontobasal de 7×6×5cm de diámetro, localizada mas sobre el lado derecho de la lámina cribosa, que capta contraste hetereogéneamente y cuyo diagnóstico de sospecha fue meningioma del surco del olfatorio. Tras su exéresis total mediante craneotomía bifrontal, la anatomía patológica es informada como schwanoma de tipo convencional. Dada la rareza de este tipo de tumores (26 hasta la fecha), revisamos la literatura, sus posibles diferencias radiológicas con el meningioma del surco del olfatorio y las diversas teorías acerca de su origen.
We report the case of a 54-year-old man who presented at the Emergency Department with intense headache of 6-days duration and sporadic nominal dysphasia. He did not present anosmia and the rest of the examination was normal. The emergency CT and the posterior cerebral MR showed a great subfrontal extra-axial mass of 7×6×5cm, over the right side of the cribiform plate, hetereogeneously enhancing after gadolinium administration. Preoperative diagnosis was olfactory groove menigioma. After total removal by bifrontal craniotomy the histopathological diagnosis was schwannoma of the conventional type. Owing to the unusual frequency of this kind of tumors (26 to the date), we review the literature, the possible radiological differences with olfactory groove meningiomas and the different theories about their origin.
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