Optic Nerve Glioma
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Tumors of the visual pathways — optic nerve, optic chiasm and optic tract — may have a long natural history. Controversies exist as to their appropriate management. Some believe therapy should be reserved until a patient has progressive symptoms, although others argue for early treatment to minimize visual deterioration. Depending on the location of the tumor, surgery, combined modalities and radiotherapy alone may be used in the treatment of this disorder. Some argue that attempt at surgical removal, even just biopsy, may make vision worse. Most of the literature recommends radiation doses of at least 4500–5000 rad. Improvements in vision are frequently seen following radiotherapy. Vascular occlusion is a late risk of high fractionated dose and high total dose radiation. Ninety-one percent of radiation oncologists would treat optic glioma according to the national survey.
KeywordsOptic Nerve Pancreatic Fistula Adenoid Cystic Carcinoma Optic Chiasm Osteoid Osteoma
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