Lentigo maligna and lentigo maligna melanoma Melanotic macule. Benign. Dark spot on labia (or lip). Analogous to lentigo simplex. Hyperpigmented basal keratinocytes & dermal melanophages. Slight in single basal melanocytes; NO nests. More info like this in Ocular Melanosis Explained by Dr. Shakeel , "Ocular Melanosis is a condition where melanin the pigment responsible for eye color gets excessively deposited in the white part of the eye Mole or nevus, what is, what treatment? Smoker's melanosis Wikipedia Iris Melanosis in Cats: Causes, Symptoms, and Treatment Cats.com