A 25 year-old Saudi male has noticed a change in a brown spot on his left eye. although he states that the spot has been present since he was 14 years old, he and his family have noticed a distinct enlargement and deepening of the pigmentation over the last 4 months. He is concerned that the lesion may represent a developing cancer. Aside from the lesion, his external examination is unremarkable.
1. What is the most likely diagnosis?
2. what is the managment?