Korean J Dermatol.
2024 Nov;62(9):516-519.
A Case of Acquired Dermal Melanocytosis of the Face and Extremities
- Ha J
1,2 - Lee GW1,2
- Shin JO1,3
- Roh D1,2
- Kim Y1,3
- Won SH1,2
- Lee J1,3
- Shin K1,3
- Kim H1,2
- Ko HC1,3
- Kim B1,2
- Kim MB1,2
- Affiliations
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- 1Department of Dermatology, Pusan National University School of Medicine, Busan, Korea
- 2Department of Dermatology, Pusan National University Hospital, Busan, Korea
- 3Department of Dermatology, Pusan National University Yangsan Hospital, Yangsan, Korea
Abstract
- Acquired dermal melanocytosis, characterized by the presence of melanocytes in the dermis, varies in the timing and location of occurrence. While congenital cases, such as Mongolian spots, nevus of Ota, nevus of Ito, and blue nevus, are common, acquired cases also occur. Acquired bilateral nevus of Ota-like macules is relatively common in Asians; however, extrafacial cases, particularly those involving both the face and extremities, are extremely rare. We report the case of a 66-year-old man with symmetric pigmented patches on the scalp, face, shoulders, and dorsa of the hands for 9 months, following the onset of spots on the forehead and nose that progressively spread. Notably, nasal ala pigmentation was confirmed. Histopathological examination revealed scattered melanin-containing dendritic cells in the upper dermis. Based on the clinicopathological findings, he was diagnosed with acquired dermal melanocytosis of the face and extremities, representing a rare case.
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