Erythroderma
Erythroderma (exfoliative dermatitis) is a severe, potentially life-threatening condition defined by diffuse erythema and scaling involving 90 percent or more of the body surface area, most often from flare of a pre-existing dermatosis such as psoriasis or atopic dermatitis, a drug hypersensitivity reaction, or an idiopathic process. Initial management centers on hemodynamic stabilization, fluid and electrolyte replacement, and warming, with low- to mid-potency topical corticosteroids for skin inflammation and systemic corticosteroids such as prednisone 0.5 to 1 mg/kg per day reserved for refractory idiopathic disease or a suspected drug reaction.
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What this article covers
- Overview
Definition: erythroderma, literally "red skin" and also called exfoliative dermatitis, is a severe, potentially life-threatening condition with diffuse erythema and scaling involving 90 percent or more of the skin surface area.
- Epidemiology
Rare condition overall: the annual incidence is estimated at approximately 1 per 100,000 in the adult population.
- Risk factors
Pre-existing inflammatory dermatosis: patients with psoriasis or atopic dermatitis risk erythrodermic flare, particularly with abrupt discontinuation of systemic corticosteroids or other immunosuppressant therapy.
- Pathophysiology
Cytokine-driven inflammatory cascade: cytokines (interleukin 1, 2, and 8, and tumor necrosis factor), chemokines, and intercellular adhesion molecules drive massive recruitment of inflammatory cells to the skin.
- Clinical features
Diagnostic threshold: by definition, over 90 percent of the skin surface area is involved, with erythematous, warm skin.
- Differential diagnosis
Erythrodermic psoriasis: nail pitting and severe, often large or bran-like scale, rather than the salmon-orange color with sparing typical of pityriasis rubra pilaris.
- Diagnosis
Diagnosis of erythroderma itself is straightforward and clinical: diffuse, generalized erythema and scaling involving 90 percent or more of the body surface area establishes the diagnosis without…
- Management
First, assess for hemodynamic instability and hospitalize if unstable or symptoms are severe; initial management covers hemodynamic status, fluid/electrolyte replacement, skin care, oral…
- Complications
High-output cardiac failure: shunting of blood through the skin from peripheral vasodilation can precipitate high-output cardiac failure, especially in older or comorbid patients.
- Prognosis
Serious disorder with substantial mortality: reported mortality ranges from 4 to 64 percent, with higher rates in older case series; advanced age, comorbidities, and need for hospitalization predict a worse outcome.
- Prevention
Control the underlying chronic dermatosis: maintaining disease control in psoriasis or atopic dermatitis and avoiding abrupt discontinuation of systemic corticosteroids or other immunosuppressants reduces the risk of flare into erythroderma.
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