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04.07.2016 | Oncology | Ausgabe 9/2016

Graefe's Archive for Clinical and Experimental Ophthalmology 9/2016

Predictive risk factors for radiation retinopathy and optic neuropathy after proton beam therapy for uveal melanoma

Zeitschrift:
Graefe's Archive for Clinical and Experimental Ophthalmology > Ausgabe 9/2016
Autoren:
Ira Seibel, Dino Cordini, Annette Hager, Johanna Tillner, Aline I. Riechardt, Jens Heufelder, Anja M. Davids, Matus Rehak, Antonia M. Joussen

Abstract

Purpose

This study was performed in order to evaluate the incidence of radiation retinopathy and optic neuropathy occurring after proton beam therapy for uveal melanoma.

Methods

Included in this study were all patients who had been treated with primary proton beam therapy for uveal melanoma at the oncology service between May 1998 and June 2014 with a minimum follow-up of 12 months. Excluded were all patients who underwent re-irradiation, or vitrectomy due to exudative retinal detachment or for tumor-resection.

Results

During this period, 1127 patients matched the inclusion criteria, of whom 768 (68.1 %) and 463 (41.0 %) developed radiation retinopathy and optic neuropathy after a median time of 18.9 months (2.0–99.84 months) and 19.8 months (0.2–170.4 months), respectively. Mean follow-up was 53.4 months (12–170.4 months). Included were 558 men (49.5 %) and 569 women (50.5 %). Mean age was 61 years (16–89 years). Visual acuity slightly decreased from initial levels of 0.3 logMAR–0.4 logMAR in patients without developing any radiation-induced complication but severely decreased to 1.0 logMAR or 1.5 logMAR in the case of developing radiation retinopathy only or optic neuropathy, respectively. Independent risk factors for radiation retinopathy were a centrally (<2.5 mm from sensitive structures) located tumor or a thick tumor located more than 2.5 mm from sensitive structures, while those for radiation optic neuropathy comprised a short distance and applied dose to the optic disk.

Conclusion

The risk for radiation retinopathy is higher in central uveal melanoma.
Mid-/peripheral tumors are at high risk for radiation retinopathy and maculopathy if presenting with increased thickness.

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