A benign, circumscribed proliferation of melanocytes in the skin. Variants include the Spitz nevus, halo nevus, blue nevus, and balloon cell nevus. The disease is benign melanocytic skin nevus (MONDO_0044794). Also known as: benign melanocytic nevus, benign melanocytic nevus of skin, benign melanocytic nevus of the skin, benign mole, benign nevus of skin, benign nevus of the skin, benign skin nevus.