PMC8452904_01
Pityriasis rosea-like eruption presenting as multiple discrete erythematous oval patches and plaques on the back (A) lower abdomen, and bilateral upper thighs (B); lesions distributed along cleavage lines without prominent scales (C).
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F1
However, after 14 days, she developed multiple discrete blanching erythematous oval patches and plaques on the lower abdomen, back, and bilateral upper thighs (Figures 1A,B). Physical examination revealed that lesions were distributed along cleavage lines, similar to PR, without herald patch or prominent scales (Figure 1C).
Central dusky-red erythematous on some plaques (A); almost all lesions fading with associated post-inflammatory hyperpigmentation after treatment (B).
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F2
Moreover, central dusky-red erythematous was observed on some plaques (Figure 2A). Moreover, almost all lesions faded with associated post-inflammatory hyperpigmentation (Figure 2B).
(A) Dermoscopic features: dotted and linear vessels forming a network on a yellowish background with some whitish peripheral scales (original magnification x20). Histopathologic features: (B) microscopic image at a low power field showing psoriasiform epidermal hyperplasia, perivascular infiltration, and interface dermatitis (hematoxylin-eosin; scale bar represents 100 mum); (C) microscopic image at a high power field showing focal spongiotic dermatitis, interface dermatitis, and perivascular infiltration of lymphocytes and eosinophils (hematoxylin-eosin; scale bar represents 40 mum).
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F3
Dermoscopy showed dotted and linear vessels forming a network on a yellowish background, with some whitish peripheral scales (Figure 3A). Histopathologic examination revealed epidermal focal spongiosis, interface dermatitis with necrotic keratinocytes, perivascular lymphocytic infiltration, and few eosinophilic infiltrations in the superficial dermis (Figures 3B,C).