Malignant blue nevus.
D006258:Head and Neck Neoplasms; D006801:Humans; D008545:Melanoma; D009506:Nevus; D018329:Nevus, Blue; D009508:Nevus, Pigmented / Q000473:pathology*; D012878:Skin Neoplasms
HEAD/neoplasms; NEVUS, PIGMENTED/pathology