[Acute post-traumatic optic nerve avulsion: case report]. / Características da fase aguda da avulsão do nervo óptico pós-trauma: relato de caso.

Optic nerve avulsion is a rare, but devastating complication. In this condition, the optic nerve is forcibly disinserted from the retina, choroid, and vitreous, and the lamina cribrosa is retracted from the scleral rim. If the media are clear, the avulsion is easily diagnosed. The appearance of the fundus is striking, with a hole or cavity where the optic disc has retracted into its dural sheath. The complementary examinations are not very accurate for the diagnosis of this pathology and with some residual vision, opaque media, that occur in partial avulsion, the diagnosis may be mistaken or delayed. In this article we report a case of complete optic nerve avulsion examined at the Retina and Vitreous Department of the "Hospital das Clínicas" of the Federal University of Uberlândia - MG - Brazil.

Características da fase aguda da avulsão do nervo óptico pós-trauma: relato de caso / Acute post-traumatic optic nerve avulsion: case report

A avulsão do nervo óptico representa uma entidade rara, levando a resultados devastadores na maioria dos casos e com prognóstico reservado. A presença de meios translúcidos possibilita, na maioria das vezes, diagnósticos acurados, mostrando a fundoscopia tipicamente uma cavidade localizada no local da retração do disco óptico para sua bainha dural. Embora exames complementares raramente sejam necessários para o diagnóstico desta afecção, quadros clínicos associados a graus variados de turvação de meios dióptricos e algum grau residual da visão, como nas roturas parciais, podem levar à dificuldade do diagnóstico e mesmo retardar o processo terapêutico. Neste artigo, relatamos a fase aguda de um caso típico de avulsão completa do nervo óptico, examinado no Serviço de Retina e Vítreo do Hospital de Clínicas da Universidade Federal de Uberlândia - MG.

Optic nerve avulsion is a rare, but devastating complication. In this condition, the optic nerve is forcibly disinserted from the retina, choroid, and vitreous, and the lamina cribrosa is retracted from the scleral rim. If the media are clear, the avulsion is easily diagnosed. The appearance of the fundus is striking, with a hole or cavity where the optic disc has retracted into its dural sheath. The complementary examinations are not very accurate for the diagnosis of this pathology and with some residual vision, opaque media, that occur in partial avulsion, the diagnosis may be mistaken or delayed. In this article we report a case of complete optic nerve avulsion examined at the Retina and Vitreous Department of the "Hospital das Clínicas" of the Federal University of Uberlândia - MG - Brazil.