• Yarong Cao, Xinpu Tang, Xin Zan, and Shuangqing Li.
• Department of General Practice, West China Hospital of Sichuan University, Chengdu, Sichuan, China.
• Medicine (Baltimore). 2022 Aug 26; 101 (34): e30132.

RationaleBenign optic nerve gliomas were rarely found in adults, and total resection of these lesions seems impossible. We aimed to share a rare clinical case with an unusual and instructive treatment process.Patient ConcernsA 52-year-old woman complained of a 4-month history of visual disturbance. Automated perimetry revealed visual field defect in her both eyes.DiagnosisThis patient was diagnosed with optic nerve glioma. We found its pathological features consistent with the pilocytic astrocytomas (WHO grade I).InterventionsA total resection of the tumor was smoothly performed.OutcomesRepeat MRI 3 months after the surgery demonstrated no recurrence of the lesion. Two years of postoperative telephone follow-up showed a stable status of improved vision.LessonsWe reported this interesting case to show a rare kind of condition regarding optic nerve gliomas in adults, which might help neurosurgeons like us to diagnose and treat these "invisible" tumors.Copyright © 2022 the Author(s). Published by Wolters Kluwer Health, Inc.

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