Analisis de la incidencia de la paralisis del nervio motor ocular comun en una poblacion neuroquirurgica. Correlacion clinica, anatomica e imagenologica / Incidence analysis of third nerve palsy in a neurosurgical poblation. Clinical, anatomical and image correlation

ABSTRACT

Objective: to describe the incidence and the different etiologies of oculomotor palsy in neurosurgical patients. Methods: Hospital records from the last 3 years were retrospectively reviewed. Five formalin-fixed adults heads were examined using X6 to X40 magnification. A correlation between clinical findings, anatomical studies and MRI images was performed. Results: medical records from 382 patients operated on at our department were reviewed. Of these, 16 patients underwent complete oculomotor palsy before brain surgery. Two patients had a mesencephalic tumor, 6 patients underwent uncal herniation due to a fast-growing intracranial mass, one patient had a superior cerebellar artery aneurysm, 3 patients had a posterior communicating artery aneurysm, one patient had a cavernous sinus meningioma. An analysis of the clinical, anatomical and MRI/ angiography data of 5 cases are presented in this study. Conclusion: oculomotor palsy is a relatively common finding in neurosurgical practice. The fact that it can be caused by different etiologies should be considered in order to arrive to the appropiate diagnosis and treatment. Anatomical knowledge of third nerve is very important when dealing with oculomotor palsy