Abstract
To report treatment of vitreous seeding of choroidal melanoma with monthly injections of intravitreal melphalan. Case report. A 70-year-old white woman noted floaters in her left eye, and further examination revealed visual acuity of 20/30 in both eyes. Funduscopically, there was a mushroom-shaped choroidal melanoma in her left eye, measuring 9 mm in basal dimension and 4.8 mm in thickness. Notably, there was apical retinal invasion of melanoma with mild vitreous hemorrhage, without vitreous seeding. The tumor was treated with iodine-125 plaque radiotherapy using an apex dose of 70 Gy over 99 hours, designed to include the retinal invasion. The melanoma demonstrated complete regression into a nearly flat scar of 1 mm and remained stable over 4 years. Five years after radiotherapy, there were diffuse vitreous pigmented seeds of presumed melanoma origin, emanating from the site of retinal necrosis. This progressively worsened over the following 18 months, suspicious for viable melanoma cells, as visual acuity concurrently declined to 20/100. Treatment with intravitreal melphalan (10 μg/0.05 mL) was delivered on a monthly basis for 12 cycles, resulting in vitreous seeds regression, and preservation of the eye. Final visual acuity was 20/200. There were no treatment-related complications. Intravitreal melphalan can be considered in cases of vitreous seeding from uveal melanoma.
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