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Archived diagnostic challenge

What’s your diagnosis?

Case #011 · Archive play does not affect the daily streak.

Close-up of the thigh showing a sharply demarcated irregular plaque with a red inflammatory rim, extensive central violaceous-black necrosis, and overlying hemorrhagic bullae. — Watermarked image sourced from DermNet DermNet Image Licence; noncommercial educational use

Close-up of the thigh showing a sharply demarcated irregular plaque with a red inflammatory rim, extensive central violaceous-black necrosis, and overlying hemorrhagic bullae. — Watermarked image sourced from DermNet DermNet Image Licence; noncommercial educational use

Stage 1 of 55 points available

12345

Photograph only

Study the image, then choose the most specific diagnosis. A new clue appears after each incorrect attempt.

Diagnosis

Catalog 2026.10-eba-expansion.1 · Searches canonical terms and common aliases

Dermdle is intended for medical education and is not medical advice or a diagnostic tool.

A daily visual diagnosis challenge designed for dermatology education, with documented sources and an accountable editorial workflow.

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Dermdle is intended for medical education and is not medical advice or a diagnostic tool.