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Acanthosis nigricans

**{{{Name|Acanthosis nigricans}}}**
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 ICD9        = 701.2|

}} Acanthosis nigricans is a brown to black, poorly defined, velvety hyperpigmentationof the skin, usually present in the posterior and lateral folds of the neck, the axilla, groin, umbilicus, and other areas.

Causes

This occurs due to insulin spillover (from excessive production due to obesity or insulininsensitivity) into the skin which results in abnormal growth being observed.

The most common cause would be insulin resistance, usually from type 2 diabetes mellitus.

Other causes are familial, obesity, drug-induced, malignant(gastric cancer) and idiopathic.

Treatment

People with acanthosis nigricans should be screened for diabetes.

External links

Photo - neck
AOCD
eMedicinederm/1
DDB58
MedlinePlus Encylopedia000852

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pt:Acantose nigricans

Retrieved from "http://en.wikipedia.org/Acanthosis_nigricans"

Categories: Dermatology| Medical signs| Medical conditions related to obesity| Medical sign stubs

This article is licensed under the GNU Free Documentation License.
It uses material from the http://en.wikipedia.org/wiki/Acanthosis+nigricans Wikipedia article Acanthosis nigricans.

All text is available under the terms of the GNU Free Documentation License