title: Malignant blue nevus. Occurrence with aggressive behavior.
mesh_terms: D006258:Head and Neck Neoplasms; D006801:Humans; D008297:Male; D008545:Melanoma; D008875:Middle Aged; D009362:Neoplasm Metastasis; D009508:Nevus, Pigmented; D012878:Skin Neoplasms