Acanthosis nigricans (AN) is a common cause ... The patches typically appear on the chest, upper back, neck, underarms, and upper arms. On lighter skin, the patches tend to be pink, red, or ...

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 ...

Her physical examination noted a stocky physique, broad chest, short neck and short digits. Two years later, skin examination revealed subcutaneous nodules and acanthosis nigricans. Investigations.