Pupil-sparing Isolated Inferior Rectus Paresis Due to Compression of the Oculomotor Nerve by the Posterior Cerebral Artery
Year: 2024
Type: article
Study design: Case Report
Abstract: Direct compression of the oculomotor nerve (OcN) is usually accompanied by OcN palsy, with an abnormal pupillary function. We herein present the case of a 76-year-old man with pupil-sparing paresis of the right inferior rectus muscle. A radiological examination revealed an epidermoid cyst at the right cerebellopontine angle, which came in contact with the right OcN. However, surgical intervention revealed compression of the inferomedial aspect of the OcN by the right posterior cerebral artery. Decompression of the nerve gradually improved the ocular movement. This unique case offers insights into the potential topographical arrangement of the OcN fibers.
Source: Internal Medicine
Authors: Yukitaka Ishida, Yasunori Fujimoto, Ryuichiro Kajikawa, Yu Kageyama, Yohei Bamba, Ayaka Ichise
Institutions: Osaka Rosai Hospital, Sakai Municipal Hospital
Language: English
Topic: Peripheral Nerve Disorders
Subfield: Radiology, Nuclear Medicine and Imaging
Field: Medicine
Domain: Health Sciences
Open Access status: diamond
OpenAlex ID: W4403508013