title: Multiple and agminated blue nevi.
mesh_terms: D003937:Diagnosis, Differential; D006801:Humans; D008297:Male; D008545:Melanoma / Q000175:diagnosis; D008875:Middle Aged; D009362:Neoplasm Metastasis; D009378:Neoplasms, Multiple Primary / Q000473:pathology*; D009508:Nevus, Pigmented / Q000175:diagnosis / Q000209:etiology / Q000473:pathology*; D012878:Skin Neoplasms / Q000175:diagnosis / Q000209:etiology / Q000473:pathology / Q000556:secondary