PMC7490443_01
A: Dermal proliferation of benign-looking small uniform cells with ductal differentiation (Hematoxylin and Eosinstain, 100x). B: Dermal proliferation of eccrine poroma (EP) with melanin pigmentation and associated inflammatory cells (H&E stain, 100x).
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PMC7490443_01_gr1.jpg
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Dermal reactive vessels and mixed inflammatory cells with neutrophil collections were present (Fig. 1A and B).
A: A broad anastomosing tumor extending from the epidermis to the dermis with multifocal fibrovascular cords and structures (H&E stain, 40x). B: On the high-power view, the tumor cells were seen to be composed of packed small uniform cells with central round-to-oval nuclei and with occasional prominent nucleoli and melanin pigment (H&E stain, 400x).
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PMC7490443_01_gr2.jpg
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Microscopic examination showed the same histological features as the first specimen (Fig. 2A and B) and a diagnosis of recurring EP of the gluteal region with no malignant transformation was verified.