Long-Term Stability of Melanocytomas With Persistent Vascular Activity Without Malignant Transformation.

To present 2 cases of large atypical melanocytomas that simulate melanoma. The largest risk factors for malignant transformation from melanocytoma into malignant melanoma are a combination of lesions with a thickness greater than 2 mm, visual symptoms, and tumor margin at the disc. The patients in this report were chosen because they both presented these factors with their lesions. Because the lesions were properly identified as melanocytomas of the optic disc, the decision was made to monitor them closely and treat the associated vascular activity. Ultrasounds and close observations are key in differentiating these benign lesions from malignant melanomas. Both patients experienced long-term stability with intravitreal injections when needed for vascular activity.