What is the pathogenesis of erythema nodosum (EN)?

Updated: May 11, 2020
  • Author: Jeanette L Hebel, MD; Chief Editor: William D James, MD  more...
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Erythema nodosum probably is a delayed hypersensitivity reaction to a variety of antigens; circulating immune complexes have not been found in idiopathic or uncomplicated cases but may be demonstrated in patients with inflammatory bowel disease. [1]

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