PMC6902382_01
On the left shin, there is a 7-cm firm, sclerotic, immobile circular plaque with a central cluster of verrucous skin-coloured papules and a 1-cm border of hyperpigmentation. Hidrosis is present at the inferior aspect of the lesion.
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On examination, she had a 7-cm firm, sclerotic, immobile circular plaque with a central cluster of verrucous skin-coloured papules and a 1-cm border of hyperpigmentation (Figure 1).
At 2x magnification, histopathological analysis reveals haphazardly arranged smooth muscle bundles throughout the reticular dermis, sclerotic intervening dermis and small collapsed blood vessels with mild perivascular lymphocytic infiltrate.
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A punch biopsy demonstrated the following: haphazardly arranged smooth muscle bundles throughout the reticular dermis, sclerotic intervening dermis, small collapsed blood vessels with mild perivascular lymphocytic infiltrate and lack of hair follicles, cytologic atypia, hypercellularity, necrosis or mitoses (Figure 2).