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Long‐term visual outcome after chemotherapy for optic pathway glioma in children: Site and age are strongly predictive

Optic pathway gliomas (OPGs) are commonly noted in pediatric oncology services. Radiotherapy is effective at controlling tumors, but has many undesirable late effects, especially in patients with neurofibromatosis. Chemotherapy is commonly used to preserve vision and delay or eliminate the need for radiotherapy. Despite visual threat being a common reason to initiate chemotherapy in patients with OPG, reports of visual outcome after chemotherapy are not common and reports of long‐term visual outcome are even scarcer.