Melanosis coli Wikipedia Melanoma Skin Cancer Melanosis coli: a contrast effect or an oncogenic effect? A large scale retrospective cohort study International Journal of Colorectal Disease Springer Nature Link How Can You Tell if It's Melanoma or Just a Mole? This lovely patient was thrilled with her beautiful result after laser treatment of oral melanotic macules. I share this case to educate: laser treatment requires accurate diagnosis, an understanding of the differential Lentigo maligna and lentigo maligna melanoma