[A new case of "olfactory schwannoma"; presentation and literature review]. / Un nuevo caso de "schwannoma del olfatorio"; presentación y revisión de laliteratura.

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 x 6 x 5 cm, over the right side of the cribiform plate, hetereogeneously enhancing after gadolinium administration. Preoperative diagnosis was olfactory groove meningioma. 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.

Un nuevo caso de "schwannoma del olfatorio"; presentación y revisión de laliteratura / A new case of “olfactory schwannoma”; presentation and literature review

Presentamos el caso de un paciente varón de 54 añosque acude a Urgencias por cefalea importante de 6 díasde evolución así como por una disfasia nominal ocasional.No presentaba anosmia ni otra sintomatología. ElTAC urgente y la RM craneal posterior muestran unagran tumoración extra-axial frontobasal de 7×6×5 cmde diámetro, localizada mas sobre el lado derecho dela lámina cribosa, que capta contraste hetereogéneamentey cuyo diagnóstico de sospecha fue meningiomadel surco del olfatorio. Tras su exéresis total mediantecraneotomía bifrontal, la anatomía patológica es informadacomo schwanoma de tipo convencional. Dada larareza de este tipo de tumores (26 hasta la fecha), revisamosla literatura, sus posibles diferencias radiológicascon el meningioma del surco del olfatorio y las diversasteorías acerca de su origen (AU)

We report the case of a 54-year-old man who presentedat the Emergency Department with intenseheadache of 6-days duration and sporadic nominaldysphasia. He did not present anosmia and the rest ofthe examination was normal. The emergency CT andthe posterior cerebral MR showed a great subfrontalextra-axial mass of 7×6×5 cm, over the right side ofthe cribiform plate, hetereogeneously enhancing aftergadolinium administration. Preoperative diagnosis wasolfactory groove menigioma. After total removal bybifrontal craniotomy the histopathological diagnosiswas schwannoma of the conventional type. Owing to the unusual frequency of this kind of tumors (26 to thedate), we review the literature, the possible radiologicaldifferences with olfactory groove meningiomas and thedifferent theories about their origin (AU)

[Cerebral astroblastoma: report of a case and literature review]. / Astroblastoma cerebral: a propósito de un caso y revisión de la literatura.

We report a new case of low grade astroblastoma of pure type and consider the definition and the clinical, neuroimaging, intraoperative and pathological characteristics of this type of uncommon intracranial tumour. We analyse the differences found in the literature concerning the immunochemistry, genetics and electron microscopy. We point out the lack of protocols for treatment of this type of intracranial tumour, and comment the various hypothesis of its origin.