Optic Nerve Glioma in Two Sisters with Family History of Neurofibromatosis Type 1

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Optic nerve glioma (ONG) is associated in 10% of patients with neurofibromatosis (NF) type 1. To date no consensus has been reached regarding the therapeutic approach and prevention of visual impairment in these patients. Reports in the literature vary from a conservative approach (observation) to the use of single treatment modalities or multimodality protocols of surgical removal, radiotherapy, and/or chemotherapy. We present our experience with two siblings with ONG whose mother carries cutaneous stigmata of NF type 1. The younger sister was diagnosed 3 years after the treatment of the older sibling following recommended imaging for screening. Postoperative follow-up for 11 and 15 years, respectively, demonstrated lack of tumor regrowth and preserved vision in the contralateral eye. We discuss the treatment strategy in pediatric patients with orbital ONG associated with NF type 1.

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