PMC7550948_01
Dermatomyositis with V sign: infiltrated coalescing erythemato-violaceous papules on
upper chest.
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Infiltrated erythemato-violaceous plaques were noted on peri-orbital regions, face, upper chest, upper back, extensor arms and dorsal fingers' joints (Figures 1 and 2).
Dermatomyositis with Gottron papules: erythematous papules on dorsal fingers' joints,
and periungueal telangiectasias with cuticular dystrophy most prominent on bilateral
fourth fingers.
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PMC7550948_01_10.1177_2050313X20961977-fig2.jpg
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Infiltrated erythemato-violaceous plaques were noted on peri-orbital regions, face, upper chest, upper back, extensor arms and dorsal fingers' joints (Figures 1 and 2).
A hematoxylin phloxine saffron-stained section at 20x magnification shows atrophic
epidermis, vacuolar interface dermatitis and perivascular lymphocytic infiltrates.
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Skin biopsy showed vacuolar interface dermatitis, perivascular lymphocytic infiltrates without adnexal involvement, and increased dermal mucin (Figures 3 and 4).
Staining with blue alcian (pH: 2.5) at 20x magnification highlights increased dermal
mucin deposition.
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PMC7550948_01_10.1177_2050313X20961977-fig4.jpg
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Skin biopsy showed vacuolar interface dermatitis, perivascular lymphocytic infiltrates without adnexal involvement, and increased dermal mucin (Figures 3 and 4).