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EB31 Erythema nodosum

International Classification of Diseases for Mortality and Morbidity Statistics, 11th Revision, v2024-01

An erythematous eruption commonly associated with drug reactions or infection and characterised by inflammatory nodules that are usually tender, multiple, and bilateral. These nodules are located predominantly on the shins with less common occurrence on the thighs and forearms. They undergo characteristic colour changes ending in temporary bruise-like areas. This condition usually subsides in 3-6 weeks without scarring or atrophy.

code elsewhere

• Acute sarcoidosis with erythema nodosum  (4B20.5)
• Drug-induced erythema nodosum  (EH6Y)

synonyms

• Erythema nodosum
• Erythema nodosum provoked by systemic fungal infection
• Erythema nodosum provoked by coccidioidomycosis
• Erythema nodosum provoked by histoplasmosis
• Erythema nodosum provoked by bacterial infection
• Erythema nodosum triggered by pregnancy
• Erythema nodosum provoked by inflammatory bowel disease
• Paraneoplastic erythema nodosum
• Subacute nodular migratory panniculitis

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