What is the Definition of Acanthosis Nigricans?
Acanthosis Nigricans is a skin condition in which brown or black velvet-like marks appear under the arms, in the groin, or on the back of the neck. Any skin fold can be affected, including the lower lip and chin.
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What Causes Acanthosis Nigricans?
Causes of acanthosis nigricans can include:
- High insulin levels in people who are obese
- Family history of acanthosis nigricans
- A cancerous tumor (rare)
Acanthosis Nigricans Risk Factors
Risk factors that increase your chances of getting acanthosis nigricans include:
- Being overweight
- Type 2 diabetes
- Polycystic ovary syndrome (PCOS)
- Genetics: People of African-American descent are more likely to develop acanthosis nigricans
What Are The Signs And Symptoms Of Acanthosis Nigricans?
If you experience any of these symptoms, do not assume it is due to acanthosis nigricans. These symptoms may be caused by other health problems.
Dark, velvety-looking areas on:
- Back of neck
- Armpits
- Groin
- Elbow
- Knees
- knuckles
- Face
- Palms of the hands
What Are The Diagnosis of Acanthosis Nigricans?
The doctor will ask about your symptoms and medical history. A physical exam will be done. Tests could include the following:
- skin biopsy
- blood tests
- Imaging, such as x-rays or endoscopy to rule out other causes
What are my Treatment Options For Acanthosis Nigricans?
Treatment often involves treating the underlying cause. For example, if acanthosis nigricans is due to obesity, weight loss may improve skin condition. Topical and oral retinoids and other medications have been reported to improve appearance in some cases. They help remove excess layers of skin.
Prevention of Acanthosis Nigricans
The best way to lower your chances of getting acanthosis nigricans is to maintain a healthy weight through diet and regular exercise.
