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Proton beam therapy for presumed and confirmed iris melanomas: a review of 36 cases. | LitMetric

Proton beam therapy for presumed and confirmed iris melanomas: a review of 36 cases.

Graefes Arch Clin Exp Ophthalmol

Department of Ophthalmology, Croix-Rousse University Hospital, University Claude Bernard Lyon 1, 103 Grande Rue de la Croix-Rousse, 69317, Lyon Cedex 04, France.

Published: September 2014

AI Article Synopsis

Article Abstract

Background: To report the clinical features and outcomes of iris melanomas treated by proton beam therapy.

Materials And Methods: A retrospective study was conducted at the Croix-Rousse University Hospital of Lyon, Department of Ophthalmology, in 36 patients treated by proton beam therapy for presumed (n = 29) and confirmed (n = 7) iris melanomas between July 1997 and October 2010. Ciliary body melanomas with iris involvement were excluded. The patients' mean age was 54.4 years (range, 22-82 years). The average tumor diameter was 3.8 mm (range, 2.5-8.0). The iridocorneal angle was invaded by the tumor in 47% of cases (n = 17), the ciliary body in 17% of cases (n = 6), and the sclera in 3% (n = 1). Raised intraocular pressure was present before treatment in 11.1 % of cases (n = 4). Tumor biopsy was performed in 19% of cases (n = 7). Four patients had undergone an initial incomplete surgical excision of tumor before radiotherapy. Surgical preparation of the eye with tantalum ring positioning had been performed in all cases 3-4 weeks before irradiation. The prescribed dose was 60 Cobalt Gray Equivalent (CGE) of proton beam radiotherapy delivered in four fractions on four consecutive days.

Results: The median follow-up was 50 months (mean 60.5, range 15-136). One patient (2.7%) was lost to follow-up. None of the patients showed tumor progression, local recurrence, or metastasis. None of the patients required secondary enucleation. Cataract was developed in 62% of patients, glaucoma in two cases (6%) after irradiation, and hyphema with the aggravation of pre-existing glaucoma in one patient. No patients developed neovascular glaucoma.

Conclusions: Proton beam therapy appears to be the treatment of choice for the conservative treatment of iris melanomas with excellent tumor control and an acceptable rate of complications. Longer follow-up studies on a larger series is necessary to consolidate these results.

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Source
http://dx.doi.org/10.1007/s00417-014-2735-yDOI Listing

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