Erythroderma, also referred to as exfoliative dermatitis, is a skin condition that is characterized by erythroderma and scaling across over 80 to 90% of the body surface area. It can be caused by a variety of systemic and cutaneous diseases (e.g. psoriasis, atopic dermatitis, non-atopic dermatitis), as well as drug hypersensitivity reactions, and a subtype of cutaneous T cell lymphoma (Sézary syndrome). The incidence of erythroderma is estimated to be around 1 per 100,000 in the adult population, and it is more common in older adults and males. The approximate prevalence of erythroderma is 0.1% in children, who may have primary dermatoses or an underlying infection, inflammatory skin disease, ichthyosis, or congenital immunodeficiency. Erythroderma is treated via symptom management and addressing the underlying etiology.

This quiz is designed to test your knowledge on the epidemiology, pathogenesis, clinical features, differential diagnosis and management of erythroderma. We encourage you to review the associated learning module before taking the quiz.

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• Bolognia, J., Schaffer, J. V., & Cerroni, L. (Eds.). (2018). Dermatology (Fourth). Elsevier.
• Photo courtesy of DermNet NZ.