MALIGNANT TRANSFORMATION of A CHOROIDAL NEVUS in AN EYE TREATED for CHOROIDAL MELANOMA

Purpose:To report a case of a choroidal melanoma and a discrete choroidal nevus that has transformed into a malignant melanoma 5 years after initial diagnosis.Methods:Retrospective case report.Results:A diffuse macular choroidal melanoma and a discrete choroidal nevus located superonasal to the optic disk were diagnosed in the right eye of a 63-year-old woman in 2009. The patient was treated by ruthenium plaque radiotherapy for the choroidal melanoma, which consequently flattened and scarred. On a routine eye check in 2014, the nevus was found to have been transformed into a choroidal melanoma. It was treated with ruthenium plaque radiotherapy.Conclusion:Although extremely rare, patients with a uveal melanoma can develop an additional discrete uveal melanoma. This case highlights the importance of monitoring benign choroidal nevi in patients with a history of choroidal melanoma.