title: Malignant acanthosis nigricans.
mesh_terms: D000052:Acanthosis Nigricans / Q000150:complications* / Q000473:pathology; D002294:Carcinoma, Squamous Cell / Q000150:complications*; D006801:Humans; D008047:Lip Diseases / Q000473:pathology*; D008048:Lip Neoplasms / Q000473:pathology*; D008297:Male; D008875:Middle Aged; D009362:Neoplasm Metastasis