Abstract
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.
Highlights
Dermal melanocytic disorders present with blue to gray pigmentation and are prevalent in Asians
A typical Mongolian spot is present on the coccygeosacral area and usually disappears within the first decade, whereas the aberrant Mongolian spot, nevus of Ota, and nevus of Ito tend to persist and at times even have a potential for malignant transformation [1,2]
In Case 1, the nevus of Ota was considered because the blue patch were observed on the periocular area and sclera, the skin biopsy revealed that the melanocytes increased mainly in the deeper dermis, so the authors could not rule out the aberrant Mongolian spot
Summary
Dermal melanocytic disorders present with blue to gray pigmentation and are prevalent in Asians. Nevus of Ota, and nevus of Ito. Mongolian spot, nevus of Ota, and nevus of Ito They share a common histopathological finding (i.e., melanocytes in the dermis), but their prognoses differ. A typical Mongolian spot is present on the coccygeosacral area and usually disappears within the first decade, whereas the aberrant Mongolian spot, nevus of Ota, and nevus of Ito tend to persist and at times even have a potential for malignant transformation [1,2]. A proper diagnosis is crucial in managing dermal melanocytosis. It is difficult to pinpoint a diagnosis if the lesion has overlapping features. We share four cases of dermal melanocytic disorders with mixed features
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