dermatologic disorders
Erythema Nodosum
Etiology of Erythema Nodosum
Etiology of erythema nodosum is unknown, but an immunologic reaction is suspected because erythema nodosum is frequently accompanied by other disorders. Themost commonaccompanying disorders are Streptococcal Infections (especially in children) Sarcoidosis None Overview of Inflammatory Bowel Disease None Other possible triggersinclude Other bacterial infections (eg, Plague and Other Yersinia Infections , Fungal infections (eg, Kerion , Overview of Rickettsial and Related Infections None Viral infections (eg, Infectious Mononucleosis , Use of drugs (eg, sulfonamides, iodides, bromides, oral contraceptives) Hematologic and solid cancers Pregnancy Behçet Disease None Up to one third of cases of erythema nodosum are idiopathic. Erythema induratum, a similar disorder, manifests with lesions on the calves and classically affects patients with tuberculosis. 