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Gamma knife radiosurgery shows effectiveness with primary orbital varices

Br J Ophthalmol. 2011;95(9):1264-1267

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In patients with primary orbital varices, performing gamma knife radiosurgery facilitated long-term symptom relief, a study found.

The retrospective study included 14 patients who underwent gamma knife radiosurgery for primary orbital varices between April 2001 and June 2005. Ages ranged from 7 to 56 years.

Median prescription peripheral dose was 16 Gy. Median maximum dose was 32 Gy. Median lesion volume was 4.5 mL at surgery, and a mean of 10 isocenters were used to treat those lesions. Mean dose to the optic nerve was below 10 Gy. Median follow-up was 36 months.

Recurrent exophthalmos and diplopia resolved in 10 patients, two patients exhibited decreased distensibility, and two patients were unchanged. One patient lost sight at 18 months postop. There were no cases of intraorbital hemorrhage after surgery.