Causes of Acanthosis nigricans
- Normal variant (Asian race)
- Obesity
- Internal malignancy (carcinoma lung, stomach, lymphoma)
- Cushing’s syndrome
- Acromegaly
- Insulin resistant diabetes
- PCOS
- Androgen secreting tumours
- Hypothyroidism
- Prader-Willi syndrome
- Drugs: OCP, Nicotinic acid
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