Acanthosis nigricans is diffuse epidermal hyperplasia (thickening of the skin). It implies increased thickness of the Malpighian layer (stratum basale and stratum spinosum).it is a skin hyperpigmentation condition which can be characterized by areas of dark, velvety discoloration in body folds.
Acanthosis nigricans is not contagious. It is not harmful. Sometimes, it is a warning sign of a health problem that requires medical attention Most people who have acanthosis nigricans have also become resistant to insulin. Insulin is a hormone secreted by the pancreas that allows your body to process sugar. Insulin resistance is what eventually causes type 2 diabetes.
Disease statistics: The prevalence of Acanthosis nigricans in brazil populations varies from 7 to 74%, according to age, race, frequency of type, degree of obesity and concomitant endocrinopathy. It has been reported that the prevalence of Acanthosis nigricans in 74% of the patients and demonstrated clear predominance of Acanthosis nigricans in dark-skinned and black women in relation to white women.