title: Melanoacanthoma of the lip.
mesh_terms: D000293:Adolescent; D005260:Female; D006801:Humans; D008048:Lip Neoplasms / Q000175:diagnosis* / Q000648:ultrastructure; D008543:Melanins / Q000032:analysis; D008544:Melanocytes / Q000648:ultrastructure; D010212:Papilloma / Q000175:diagnosis* / Q000648:ultrastructure
chemical_list: D008543:Melanins