Dermatopathology Review: Case #18

Test yourself with this gold-standard dermatopathology case, curated by leading specialists with decades of experience (including our own Rajendra Singh MD). Check the history, scrutinize the interactive WSI with our viewer, and make your diagnosis. Can you get it? Good luck!

Case #18: History

From our Dermpath 100 Collection

A 28-year-old woman presents in mid-winter with painful, itchy red-purple lesions on her fingers and toes. The lesions appeared after prolonged exposure to col and improve slightly when she warms up. On examination, there are erythematous to violaceous papules and plaques on the dorsal fingers and toes, without ulceration or necrosis. She has no signs of systemic illness, and ANA testing is negative. What is your diagnosis?

Perniosis

Graft-versus-host disease

Psoriasis

Lichen Planus

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