Image and content excerpted from the VisualDx clinical decision support system.
VisualDx images show variation in age, skin color, and disease stage. VisualDx has 18 images of Erythema Induratum.
Full text and additional images for Erythema Induratum are available in the following VisualDx packages:
709.1 – Vascular disorders of skin
L95.8 – Other vasculitis limited to the skin
SynopsisErythema induratum, also known as nodular vasculitis, is a form of lobular panniculitis with multiple etiologies. Tender erythematous to violaceous nodules and/or plaques are seen, usually on the calves. Lesions have also been seen on the feet, thighs, buttocks, and arms. Ulceration and drainage may occur. Lesions tend to heal with scarring and are prone to recurrence. Women are most commonly affected (80%-90% of patients), with peaks in incidence during early adolescence and around menopause.
There are many etiologies. Mycobacterium tuberculosis infection is one of the strongest associated triggers. The term erythema induratum of Bazin refers specifically to cases of tuberculous etiology. Cases can also be idiopathic or induced by other infectious agents or drugs. The condition is thought to be either an immune complex-mediated vasculitis or a type IV cell-mediated response to an antigenic stimulus.