Erythema nodosum

Published on 02/04/2015 by admin

Filed under Internal Medicine

Last modified 02/04/2015

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189 Erythema nodosum

Instruction

Look at this patient’s shins.

Salient features

History

• Elicit a history of:

• fever (may precede the skin lesions by 1–7 days)
• painful nodules
• arthalgias
• sore throat (β-haemolytic streptococcal infection)
• drugs (sulphonamides, penicillins, oral contraceptives)
• GI symptoms (Yersinia enterocolitica infections)
• infections (TB, leprosy, coccidiomycosis, histoplasmosis)
• sarcoidosis.

Remember:

• about half the cases are idiopathic

• lesions can be less intense in coloration, like large pink hives

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