Clinical forms of actinic keratosis and levels of dysplasia of the epidermis.

Objective: Introduction: Actinic keratosis (AK) is precancerous skin lesion that occurs in the sun-exposedskin areas characterized by local intraepidermal dysplasia of different severity (KIN I, KIN II and KIN III). The aim of this research was to study distribution patterns and morphological features of AK histological types.

Patients And Methods: Materials and Methods: The study included skin biopsy material from 68 patients with different clinical forms of AK.