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Microscopic appearance of the bluish macule after haematoxylin and eosin staining.
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An excision biopsy (17 x 17x5 mm) and staining with haematoxylin and eosin of the lesion revealed black and brown pigment deposits on dermal elastin and collagen fibres, and around sweat ducts (Figure 1).
Large, pigmented cluster on the haematoxylin and eosin-stained histological sample.
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A large cluster of black material was observed, surrounded by finer pigmented deposits on dermal collagen (Figures 2 and 3).
Magnified image of the large, pigmented cluster on the haematoxylin and eosin-stained histological sample.
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A large cluster of black material was observed, surrounded by finer pigmented deposits on dermal collagen (Figures 2 and 3).