Treatment of extensive erythema multiforme with topical gentian violet.

Topical and systemic therapies for erythema multiforme have been widely described in the literature. The pathogenesis of erythema multiforme involves increased expression of vascular endothelial growth factor resulting in the promotion of microvascular permeability and angiogenesis. Gentian violet has been shown to have antiangiogenic properties. Here, we present a case of erythema multiforme successfully treated with topical gentian violet. We report the case of a patient who presented with erythema multiforme. Prior pertinent history included diabetes mellitus type I, limiting the clinical use of systemic corticosteroids. Topical gentian violet was used to treat the cutaneous lesions. Our patient responded well to treatment with topical gentian violet with stabilization and resolution of the lesions without using systemic therapy that may pose serious side effects in the setting of other comorbidities such as diabetes mellitus type I. This case highlights the variable therapeutic options available for treatment of erythema multiforme, including topical gentian violet. While further studies are needed, this case demonstrates the antiangiogenic properties and clinical utility of topical gentian violet in the treatment of erythema multiforme.