Acanthosis nigricans presents as a brown to black pigmentation usually seen in the neck or armpit areas. In relation to diabetes, this may indicate:
Answer: D. Insulin resistance
There are eight types of acanthosis nigricans. When seen in young adults, this can alert the clinicians caring for these individuals of the need for diabetes screening. When seen with type 2 diabetes, it is usually related to obesity; weight loss to decrease insulin resistance and improve blood glucose control can improve it. Acanthosis nigricans should always be evaluated because it can also be an indication of cancer in an internal organ, particularly when it occurs in older individuals.
Acanthosis nigricans - http://www.medscape.com/viewarticle/444059_3