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Conservative treatment with regular clinical and radiological follow-up was chosen because neurological examination findings were normal. Three years later, the patient experienced blurred vision with a temporal crescent defect in the left eye. Endoscopic cyst fenestration was performed, and the pathological findings indicated a glioependymal cyst. After surgery, the monocular temporal crescent disorder was resolved. MRI indicated shrinkage of the cyst and improvement in the narrowing of the anterior calcarine sulcus. These findings suggested that the temporal crescent syndrome was caused by a lateral ventricular glioependymal cyst. This is the first known report of temporal crescent syndrome caused by a lateral ventricular glioependymal cyst. In patients with monocular temporal crescent disorder without intraocular disease, a retrochiasmal lesion in the most anterior portion of the striate cortex should be considered.<\/jats:p>","DOI":"10.3171\/2020.3.peds2021","type":"journal-article","created":{"date-parts":[[2020,5,15]],"date-time":"2020-05-15T07:14:09Z","timestamp":1589526849000},"page":"232-236","source":"Crossref","is-referenced-by-count":3,"title":["Temporal crescent syndrome caused by a lateral ventricular glioependymal cyst: case report"],"prefix":"10.3171","volume":"26","author":[{"given":"Izumi","family":"Yamaguchi","sequence":"first","affiliation":[{"name":"Department of Neurosurgery, Tokushima University Graduate School of Biomedical Sciences, Tokushima;"},{"name":"Department of Neurosurgery, National Hospital Organization Shikoku Medical Center for Children and Adults, Kagawa; and"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Kyong-Hon","family":"Pooh","sequence":"additional","affiliation":[{"name":"Department of Neurosurgery, National Hospital Organization Shikoku Medical Center for Children and Adults, Kagawa; and"},{"name":"Department of Neurosurgery, Tosa Kibounoie Health and Welfare Center, Kochi, Japan"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Mai","family":"Azumi","sequence":"additional","affiliation":[{"name":"Department of Neurosurgery, Tokushima University Graduate School of Biomedical Sciences, Tokushima;"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Yasushi","family":"Takagi","sequence":"additional","affiliation":[{"name":"Department of Neurosurgery, Tokushima University Graduate School of Biomedical Sciences, Tokushima;"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"1754","reference":[{"issue":"3","key":"b1","series-title":"Am J Ophthalmol","doi-asserted-by":"publisher","first-page":"345","DOI":"10.1016\/S0002-9394(14)71178-X","article-title":"The missing temporal crescent","volume":"119","author":"Landau K","year":"1995","unstructured":"Landau K, Wichmann W, Valavanis A. 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