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Image Number 350 (Erythema Ab Igne)


Diagnosis: Erythema Ab Igne

Site: Knee

Sex: F

Age: 70

Type: Clinical

Description: Reticulate hyperpigmentation on the knee and leg

Submitted by: Shahbaz Janjua

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Differential Diagnosis

History: Erythema ab igne is a localized, cutaneous condition, consisting of reticulate hyperpigmentation, dusky erythema, epidermal atrophy, and telangiectasia, all resulting from repeated exposures to moderate heat.   Secondary changes like crusting, hyperkeratosis, and bullae formation may rarely develop.  Poikilodermatous changes are usually consequence of prolonged exposure.

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