Acquired Dermal Melanocytosis of the Dorsum in a Middle-Aged Asian Woman

We report a case of a 65-year-old man who developed an asymptomatic bluish spot that affected the flank and left lumbar region with the onset 10 years prior. He had a history of diffuse systemic sclerosis with anti-Scl-70-positive antibodies. The appearance of the skin lesion coincided with the onset of his disease. The skin biopsy was consistent with the diagnosis of acquired dermal melanocytosis. The relationship between the appearance of acquired pigmented macules and spots and systemic sclerosis has been known for years, although it is an infrequent finding.

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Acquired Dermal Melanocytosis Associated With Diffuse Systemic Sclerosis in a White Patient

Ossorio-García

Millán-Ortega

Jiménez‐Gallo

et al. 2019

The American Journal of Dermatopathology

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A Report of Unusual Case of Acquired Dermal Melanocytosis on the Scalp of a Caucasian Man with a Literature Review

et al. 2022

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Dermal melanocytosis includes several benign pigmented lesions which present as blue-gray color which is a result of the color transmission of melanin pigment through the dermis. While some types are present at birth, there is an acquired variant, acquired dermal melanocytosis (ADM), which usually involves faces of middle-aged Asian women. To the best of our knowledge, there are limited reports of extra facial ADM which all are on the trunk and extremities. Herein, we report a unique case of extra facial ADM affecting the scalp of a middle-aged man and provide a review of all extra facial ADM cases that have been reported.

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Blue Nevus Associated With Acquired Dermal Melanocytosis on the Back

Iinuma,

Kobayashi,

Fujiki

2024

Cureus

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Dermal melanocytosis includes various congenital and acquired pigmentary disorders characterized by dermal dendritic melanocytes. Blue nevi typically present as papulonodular lesions, whereas other dermal melanocytoses manifest as patches. This report describes a case of a blue nevus associated with acquired dermal melanocytosis on the back of a 46-year-old Japanese woman. The patient presented with a black nodule on a blue-greyish hyperpigmented area on the upper back. Histopathological analysis of the nodule confirmed a common blue nevus, whereas the adjacent hyperpigmented area showed features consistent with acquired dermal melanocytosis. Blue nevi and acquired dermal melanocytoses share a common pathophysiology involving ectopic melanocyte accumulation during embryogenesis. The coexistence of blue nevus and acquired dermal melanocytosis on the back is rare, highlighting the broad spectrum of dermal melanocytosis and the variability of its clinical manifestations. Recognition of such unusual presentations is critical for appropriate diagnosis and management.

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Acquired Dermal Melanocytosis of the Dorsum in a Middle-Aged Asian Woman

Cited by 3 publications

References 5 publications

Acquired Dermal Melanocytosis Associated With Diffuse Systemic Sclerosis in a White Patient

Acquired Dermal Melanocytosis Associated With Diffuse Systemic Sclerosis in a White Patient

A Report of Unusual Case of Acquired Dermal Melanocytosis on the Scalp of a Caucasian Man with a Literature Review

Blue Nevus Associated With Acquired Dermal Melanocytosis on the Back

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