OttoMoncorps keratosis is a rare dermatosis, which excessive keratinization of the nipple and areola mammary gland with an unknown etiology pathogenesis. According to classification proposed by LevyFrankel in 1938, disease can be represented three types: type 1 ― variant epidermal nevus, 2 associated other diseases 3 idiopathic. The diagnosis based on data clinical picture, diffuse gland, dark ...