Acanthosis nigricans can affect otherwise healthy people or can be associated with internal malignancy, endocrine abnormalities, or obesity. Some cases have a familial tendency. Acanthosis ...

Acute Onset of Disseminated Superficial Actinic Porokeratosis and Solid Malignancy ... from hepatitis C and zinc deficiency, acanthosis nigricans and metabolic syndrome, psoriasis, and ...