[Olfactory groove schwannoma: case report].
Intracranial schwannoma not related to cranial nerves are unusual and rarely found in the subfrontal region. We report a case of olfactory groove schwannoma in a 27-year-old male, who presented with anosmia and headache initiated one year ago. At admission, bilateral papilledema was noted with absense of motor deficits or cranial nerves abnormalities. Cranial computed tomography (CT) revealed a bifrontal multicystic isodense enhancing mass lesion causing a frontal ventricular horn compression. Radiological features resembled that of a cystic olfactory groove meningioma. Decompressive bifrontal craniotomy was done. One month later, CT demonstrated a homogeneously contrast-enhancing mass in the olfactory groove region who extended into the left nasal cavity. Magnetic resonance imaging did not add more informations. A second surgical procedure was done through a nasoethmoidal approach with incomplete resection of the lesion. The complete tumor resection was only possible in a third surgery through another bifrontal approach. The hystopathological diagnosis of schwannoma was performed by conventional methods and confirmed by immunohistoquemical staining for S-100 protein. The rarity of this tumor and his clinical, radiological and histological aspects justify this publication.
de Souza
Heider Lopes
HL
Serviço de Neurocirurgia, Hospital Universitário Onofre Lopes, Universidade Federal do Rio Grande do Norte, Brasil. heider@ufrnet.br
Ramos
Ana Maria de Oliveira
AM
Ramos
Carlos Cesar Formiga
CC
Melo
Syomara Pereira da Costa
SP
Pereira
Hougelle Simplício Gomes
HS
Madureira
João Flávio Gurjão
JF
de Lana
Janaína Martins
JM
D000328:Adult; D003390:Cranial Nerve Neoplasms / Q000175:diagnosis* / Q000473:pathology / Q000601:surgery; D003399:Craniotomy; D006801:Humans; D007150:Immunohistochemistry; D008279:Magnetic Resonance Imaging; D008297:Male; D009442:Neurilemmoma / Q000175:diagnosis* / Q000473:pathology / Q000601:surgery; D020431:Olfactory Nerve Diseases / Q000175:diagnosis* / Q000473:pathology / Q000601:surgery; D009833:Olfactory Pathways; D012086:Reoperation; D014057:Tomography, X-Ray Computed
Schwannoma da goteira olfatória: relato de caso.