[Clinical types of acanthosis nigricans]

Acanthosis nigricans is a rare disease, occurring with the same frequency in females and males. Eight clinically practical types of this disease have been presented. Authors also observed a coexistence of this disease with neoplasms, which obligates doctors to perform more accurate diagnosis of the patient. The clinically practical scale of the intensification of skin lesions in acanthosis nigricans has been also presented. This scale is helpful in therapy monitoring.