3-rx.comCustomer Support
HomeAbout UsFAQContactHelp
News Center
Health Centers
Medical Encyclopedia
Drugs & Medications
Diseases & Conditions
Medical Symptoms
Med. Tests & Exams
Surgery & Procedures
Injuries & Wounds
Diet & Nutrition
Special Topics

\"$alt_text\"');"); } else { echo"\"$alt_text\""; } ?>

You are here : 3-RX.com > Medical Encyclopedia > Diseases and Conditions > Acanthosis Nigricans
      Category : Health Centers > Skin Conditions

Acanthosis Nigricans

Alternate Names : AN

Overview, Causes, & Risk Factors | Symptoms & Signs | Diagnosis & Tests | Prevention & Expectations | Treatment & Monitoring

Acanthosis nigricans is a disease that causes dark, thick areas on the skin. The areas affected are spread out, and the skin is velvety. It is most common in the armpits and other body folds.

What is going on in the body?

There are four types of acanthosis nigricans.

  • Gougerot-Carteaud syndrome occurs in young females and is probably inherited.
  • Malignant acanthosis nigricans is sometimes seen in adults with cancer of the genital, urinary, or gastrointestinal systems.
  • Miescher syndrome is an inherited disease that causes skin lesions for no apparent reason.
  • Pseudoacanthosis nigricans is caused by a hormone imbalance in the body that may cause excess insulin in the blood.
  • What are the causes and risks of the disease?

    There are many causes of acanthosis nigricans, including the following:

  • Addison disease, which is caused by a deficiency of hormones from the adrenal gland
  • diabetes
  • disorders of the pituitary gland within the brain
  • genetic causes
  • growth hormone therapy
  • hypothyroidism, which means low levels of thyroid hormone that are caused by decreased activity of the thyroid gland
  • insulin resistance caused by obesity
  • oral contraceptives
  • some medicines, such as nicotinic acid, which are used to treat high cholesterol


    Next section


    Acanthosis Nigricans: Symptoms & Signs

    Author: James Broomfield, MD
    Reviewer: Eileen McLaughlin, RN, BSN
    Date Reviewed: 08/20/01

    \"$alt_text\"');"); } else { echo"\"$alt_text\""; } ?>

    Home | About Us | FAQ | Contact | Advertising Policy | Privacy Policy | Bookmark Site