Eschar

• A scab or dry crust that results from trauma, infection, or excoriating skin disease.

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  Eschar in a purpuric plaque in a child with acute meningococcemia.

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  An eschar and some thinner crusts of vasculitis on a base of erythema on the knee.

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  An ulcerated plaque of cutaneous leishmaniasis with an overlying eschar on the leg.

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  Small eschar with a hemorrhagic base in aspergillosis.