Pilocytic astrocytoma of the optic nerve with intracystic hemorrhage in an adult: illustrative case

BACKGROUNDOptic pathway gliomas are uncommon, accounting for 3-5% of childhood brain tumors, and are mostly classified as pilocytic astrocytomas (PAs). PAs of the optic nerve are particularly rare in adults. OBSERVATIONSThe authors presented the case of PA of the left optic nerve in a 49-year-old wo...

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Published inJournal of neurosurgery. Case lessons Vol. 4; no. 2; p. CASE22143
Main Authors Kuramitsu, Shunichiro, Suzaki, Noriyuki, Takahashi, Tatsuo, Murakami, Yoshiko, Asai, Takumi, Eguchi, Kaoru, Ando, Ryo, Tamari, Yosuke, Ito, Shohei, Kimata, Masayuki, Terao, Kazuichi, Kajita, Yasukazu
Format Report
LanguageEnglish
Published 11.07.2022
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Summary:BACKGROUNDOptic pathway gliomas are uncommon, accounting for 3-5% of childhood brain tumors, and are mostly classified as pilocytic astrocytomas (PAs). PAs of the optic nerve are particularly rare in adults. OBSERVATIONSThe authors presented the case of PA of the left optic nerve in a 49-year-old woman along with detailed pathological and molecular analyses and sequential magnetic resonance imaging. The tumor had progressed during 5 years of follow-up along with cyst formation and intracystic hemorrhage; it had a thick capsule and contained xanthochromic fluid. The boundary between tumor and optic nerve was unclear. B-type Raf kinase (BRAF) V600E point mutations or translocations, IDH1-R132H mutations, loss of alpha-thalassemia/mental retardation X-linked, and 1p/19q codeletion were negative. LESSONSBRAF alterations in pediatric PAs of the optic nerve are less frequent than those observed in PAs in other lesions; the same molecular pattern was observed in the adult case, without changes in BRAF. Surgical management should be indicated only in cases with severely impaired vision or disfigurement because there is no clear border between the tumor and optic nerve. Further discussion is needed to optimize the treatment for adult optic pathway gliomas, including radiotherapy, chemotherapy, and molecular-targeted therapies, in addition to surgical intervention.
Bibliography:ObjectType-Case Study-2
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ISSN:2694-1902
DOI:10.3171/CASE22143