Erythema nodosum as an early sign of Crohn's disease.

Erythema nodosum is the most common form of septal panniculitis and the most frequent skin manifestation associated with inflammatory bowel disease. Since the development of erythema nodosum is closely related with a variety of disorders and conditions, it can serve as an important early sign of systemic disease. We report on a 25-year-old woman with Crohn's disease following a long history of recurrent erythema nodosum.