A Case of Dermal Melanocytosis with Various Morphological Forms / 대한피부과학회지

ABSTRACT

Dermal melanocytosis is characterized by the presence of ectopic melanocytes in the dermis and shows several morphological forms, including the mongolian spot, the blue nevus, the nevus of Ota, the nevus of Ito, and dermal melanocyte hamartoma. A 30-month-old boy had a gray blue patch on the left deltoid region, upper back, sacral area, the entire length of the right arm, and right hand. There was a bluish speckled patch on the right palm. The lesions were present at birth, and no appreciable change in appearance had occurred. He also had blue to brownish pigmentation on the right side of his face with dark bluish pigmentation of the right sclera. His Mental and physical development had been normal. The histopathological examination revealed dendritic dermal melanocytes, mainly in the upper and mid dermis. Clinically and pathologically, the patient was diagnosed as having Ota nevus, Ito nevus, mongolian spot, and dermal melanocyte hamartoma. To our knowledge, dermal melanocytosis with 4 different morphological forms in a patient has not previously been reported. We report this unique case of dermal melanocytosis with various morphological forms.