Erythema Induratum

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Image of Erythema Induratum

VisualDx images show variation in age, skin color, and disease stage. VisualDx has 21 images of Erythema Induratum.

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ICD Codes

ICD-9-CM:
709.1 – Vascular disorders of skin

ICD-10-CM:
L95.8 – Other vasculitis limited to the skin

Synopsis

Erythema 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.

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