A rare case of oculocutaneous melanosis (nevus of Ota) at Ophthalmologist's appointment

A rare clinical case of nevus of Ota in a 6-year-old child is described. The clinical picture and diagnostic methods used in this case are reflected. On the example of the patients presented in this article, differential diagnosis with alkaptonuria is fully described. Given the risk of transition to skin melanoma and ocular melanoma, patients with nevus of Ota should be observed by Dermatologist and Ophthalmologist annually. Such patients should also strictly avoid exposition to any ultraviolet radiation and exclude possible risk factors traumatizing the nevus. Key words: nevus, Ota nevus, alkaptonuria, skin melanoma, eye melanoma.

Dermal Melanocytic Disorders

Dermal melanocytic disorders present as bluish pigmentation on the skin. Several entities including Mongolian spot, aberrant Mongolian spot, nevus of Ota, and nevus of Ito have been reported. It is often difficult to distinguish between the different entities from their overlapping features. Although they share similar etiologies and histologic findings, their co-morbidities and prognosis differ. In this paper, we report four cases of dermal melanocytic disorders of which we were not able to make a clear-cut diagnosis. Also, we briefly review the dermal melanocytic disorders.