PMC9621347_01
(a) Prurigo pimentosa: Erythematous papules and plaques on the chest. (b) Prurigo pigmentosa: Erythematous papules on the neck
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F1
(a): x10: Low power examination reveals an acanthotic epidermis with some spongiotic vesicles. Superficial dermis is infiltrated by lymphocytes and few eosnophils. (b) x100: An acanthotic epidermis with prominent spongiotic vesicles containing lymphocytes and few neutrophils. Papillary dermis revesls superficial perivascular infiltrate of lymphocytes as well as few eosinophils
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F2
Papillary dermis revealed superficial perivascular infiltrate of lymphocytes and scattered eosinophils [Figure 2a and b].
(a) Her lesions resolved leaving only multiple post-inflammatory hyperpigmentation (PIH) on her chest. (b) Her lesions resolved leaving only multiple PIH on her neck
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F3
She came to her follow-up appointment after 2 months while all of her lesions were resolved, leaving only light-brown postinflammatory pigmentation on her chest and neck [Figure 3a and b].