Vitreoretinal Surgery for Intraocular Complications Following Radiotherapy Treatment of Uveal Melanoma

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(1) Background: Globe-sparing radiotherapy is widely utilised in the treatment of uveal melanoma, but often results in complications requiring vitreoretinal intervention. The outcomes of secondary vitrectomy remain unclear. A multidisciplinary approach involving vitreoretinal and ocular oncology specialists is essential to managing complications. (2) Methods: We reviewed 1794 patients treated with radiotherapy for uveal melanoma between 2012 and 2022. In total, 70 patients underwent secondary vitrectomy after primary radiotherapy treatment. The outcomes included overall tumour control and visual outcome. (3) Results: Complications requiring vitrectomy were more common after proton-beam radiotherapy than plaque brachytherapy (5.4% versus 3.0%). Common indications included vitreous haemorrhage (39%) and retinal detachment/toxic tumour syndrome (31%). The affected tumours were larger, more often ciliary body in origin, and associated with a worse prognosis. Vitrectomy patients had higher rates of enucleation (9% versus 3%), metastasis (16% versus 6%), and visual decline (average 0.60 LogMAR), with limited visual improvement (≥3-line gain in 13%). Proton-beam patients had worse outcomes than plaque brachytherapy patients. (4) Conclusions: Vitreoretinal complications after uveal melanoma radiotherapy are rare, but timely treatment by those with experience may enable patients to keep their eye in situations where enucleation would be the only alternative. Patients and clinicians must understand the risks of complications to make informed decisions about treatment plans, with vitreoretinal surgeons and ocular oncologists key to outcomes.

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