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Prechiasmatic transection of the optic nerve in optic nerve glioma: technical description and surgical outcome

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Abstract

Optic pathway glioma (OPG) encompasses a spectrum of findings ranging from lesions confined to the optic nerve only, lesions affecting the optic chiasm and hypothalamus, and lesions with diffuse involvement of a large part of the optic pathway and neighboring structures. The majority of pediatric low-grade astrocytomas in the optic/chiasmatic region are typical pilocytic astrocytoma. The rest of them (10 %) may be other gliomas such as fibrillary pilomyxoid astrocytoma (grade 2 WHO). The postsurgical local recurrence rate of 55 to 76 % has been reported in some histological subtypes such as pilomyxoid astrocytoma (grade 2). Performing a prechiasmatic transection might offer a new surgical option to avoid further tumor growth toward the chiasm in the optic nerve glioma with predominantly orbital manifestations. In this retrospective study, four patients (three children, two without neurofibromatosis type 1 (NF1), and one with NF1 and one adult without NF1) with optic nerve glioma without involvement of the chiasm but blindness, disfiguring proptosis, and pain of the affected eye were included. The surgical approach was performed as a combined approach from pterional extradural and intradural. Without any exceptions, vision of the contralateral eye could be preserved and did not show any deterioration after surgery or during the follow-up time between 17 and 106 months. Furthermore, in all patients, gross total tumor resection could be achieved. During follow-up observation in all patients, no further tumor progress or recurrences could be observed. None of the patients were treated postoperatively by radiotherapy or chemotherapy. Prechiasmatic transection of the optic nerve in optic nerve glioma without affecting the chiasm might offer a surgical treatment option to control tumor growth and to preserve vision of the contralateral eye.

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Correspondence to Hamid Borghei-Razavi.

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Video 1

Prechiasmatic transection of the optic nerve intradurally posterior to the tumor border and 2–3 mm anterior to the optic chiasm (tumor border and optic chiasm shown in Fig. 3 with different colors; MP4 96,509 kb)

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Borghei-Razavi, H., Shibao, S. & Schick, U. Prechiasmatic transection of the optic nerve in optic nerve glioma: technical description and surgical outcome. Neurosurg Rev 40, 135–141 (2017). https://doi.org/10.1007/s10143-016-0747-2

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  • DOI: https://doi.org/10.1007/s10143-016-0747-2

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