Erythema nodosum (EN) is characterized by multiple symmetric, nonulcerative tender nodules on the extensor surface of the lowerextremities, typically in young adults.
Peak incidence i...
Tender erythematous nodules symmetrically distributed on extensor surface of lower legs
Lesions occasionally occur on fingers, hands, arms, calves, and thighs.
In bedridden p...
Rare in children, S. pharyngitis is the most likely etiology.
Catscratch disease should be considered.
Nontoxic patients, able to take PO fluids without difficulty
Scheduled follow-up sh...
EN is usually idiopathic but may be the 1st sign of systemic disease.
Lesions may recur if underlying disease is not treated.
Atypical and chronic lesions may indicate an alternative...
Gilchrist H, Patterson JW. Erythema nodosum and erythema induratum (nodular vasculitis): Diagnosis and management. Dermatol Ther. 2010;23(4):320–327.
James JD, Berger TG, E...
017.10 Erythema nodosum with hypersensitivity reaction in tuberculosis, unspecified
695.2 Erythema nodosum
A18.4 Tuberculosis of skin and subcutaneous tissue
L52 Erythema nodosum
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