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Schwannomas do acustico representam 8% dos tumores intracranianos primarios do adulto, havendo apenas 20 casos relatados em criancas sem associacao com neurofibromatose. Aqueles que ocorrem em criancas geralmente sao ricamente vascularizados, sendo preconizada por alguns autores a embolizacao da lesao antes da cirurgia. Relata-se e discute-se o terceiro caso da literatura nacional de schwannoma do acustico em uma crianca sem associacao com neurofibromatose. Paciente feminina, de 10 anos, apresentando ataxia, cefaleia e diminuicao da acuidade auditiva a direita. A ressonância magnetica (RM) mostrou massa tumoral no ângulo pontocerebelar direito sugestiva de meduloblastoma/ependimoma. A analise histopatologica do especime cirurgico fez o diagnostico de schwannoma do acustico. Na investigacao clinica, a crianca nao apresentava neurofibromatose. Embora seja raro em criancas sem associacao com neurofibromatose, a hipotese de schwannoma nao deve ser descartada em casos de diminuicao da acuidade auditiva com RM demonstrando massa tumoral no ângulo pontocerebelar. Acoustic schwannomas account for 8% of primary adult intracranial tumors, and there are only 20 cases reported in children without neurofibromatosis. These tumors are extremely vascular in children, and some authors recommend a preoperative angiographic embolization. We report and discuss the third case of the national literature of an acoustic schwannoma in a child without neurofibromatosis. 10 year-old female, with ataxia, headache and deafness in the right ear. Magnetic resonance imaging (MRI) revealed a tumor mass in the right cerebellopontine angle suggestive of medulloblastoma/ependimoma. The histopathological analyses diagnosed an acoustic schwannoma. None clinical evidence of neurofibromatosis was seen. Although schwannoma is rare in children without neurofibromatosis, this hypothesis can not be dismissing in patients with deafness and MRI reveling tumor mass in the cerebellopontine angle.

Shwannoma unilateral do acústico em criança sem associação com neurofibromatose