Application of Machine Learning in Melanoma Detection and the Identification of 'Ugly Duckling' and Suspicious Naevi: A Review A Better Way to Distinguish Among Melanomas? Contemporary Approaches to Malignant Melanoma Epithelial, non melanocytic and melanocytic proliferations of the ocular surface ScienceDirect A nevus is a benign (non cancerous) melanocytic tumor, more commonly called a mole. Will it develop into an issue? Find out.