RESUMEN
Schwannoma é um tumor neurogênico benigno raro, originário das células de Schwann da bainha de mielina dos nervos periféricos. Sua localização nos tecidos oculares não é comum, sendo a órbita o local afetado com maior frequência e o acometimento das pálpebras é muito raro. Há poucos relatos descritos na literatura sobre Schwannoma palpebral, apenas dois em crianças. Este é, em nosso conhecimento, o primeiro caso relatado no Brasil.
Schwannoma is a rare benign neurogenic tumor. It arises from Schwann cells located at the myelin sheath of peripheral nerves. Its incidence is frequently associated with the orbit. Ocular tissues in general and eyelids in particular are rarely affected. Very few reports can be found in the literature describing eyelid schwannomas. Amongst these, we have found only two describing it affecting children. To our knowledge, this is the first case report about eyelid schwanomma in Brazil - and it involves a child.
Asunto(s)
Humanos , Femenino , Niño , Neoplasias de los Párpados/patología , Neurilemoma/patología , Procedimientos Quirúrgicos Oftalmológicos , Biopsia , Inmunohistoquímica , Proteínas S100/análisis , Neoplasias de los Párpados/cirugía , Neoplasias de los Párpados/química , Neurilemoma/cirugía , Neurilemoma/químicaRESUMEN
Histopathologic features in two intramedullary schwann-cell tumours, closely resembled with those of fibrillary astrocytoma and could not be differentiated from each other by the conventional histochemical stains. However application of tumour markers-Glial fibrillary acidic protein (GFAP) and S-100 protein were found to be useful in differentiating these two tumours and thus helped in making an accurate histopathological diagnosis in these two patients.