What is the prevalence of erythema nodosum in pediatric Crohn disease and how does it present?

Updated: Oct 23, 2018
  • Author: Andrew B Grossman, MD; Chief Editor: Carmen Cuffari, MD  more...
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Erythema nodosum is the most common skin manifestation of Crohn disease. It is more common in Crohn disease than in UC and usually follows the course of the disease. Erythema nodosum affects 3% of pediatric patients with Crohn disease (a lower rate than that in adults). Approximately 75% of patients with erythema nodosum ultimately develop arthritis. The lesions of erythema nodosum are raised, red, tender nodules that appear primarily on the anterior surfaces of the lower leg.

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