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What is Asteatotic Eczema (Xerotic Eczema)?
Asteatotic eczema is a form of eczematous dermatitis characterized by dry, cracked skin with a distinctive "crazy paving" or craquelé pattern, typically occurring in areas of dehydrated skin, most commonly on the lower legs of elderly individuals 1.
Clinical Features to Recognize:
- Appearance: Erythematous (red), dry plaques with fine crackling or fissuring that resembles cracked porcelain or dried mud
- Distribution: Most commonly affects the lower legs (shins), but can occur on arms, trunk, and other areas
- Texture: Skin appears scaly with a network of fine cracks
- Associated symptoms: Pruritus (itching) and xerosis (dryness)
Key Clinical Context:
The condition develops when decreased humidity results in increased water loss from the stratum corneum, making it particularly common during winter months 1. It predominantly affects elderly patients due to age-related changes in skin barrier function 2.
Important Clinical Pearls:
Red flag: Generalized, treatment-resistant asteatotic eczema that doesn't respond to topical corticosteroids and emollients may indicate underlying systemic lymphoma, particularly in older men 3, 4. This paraneoplastic presentation is characterized by glucocorticoid resistance and should prompt investigation for malignancy.
Asteatotic eczema can also occur in hypoesthetic (reduced sensation) skin following trauma or scarring 1.
Where to Find Images:
For visual reference, consult:
- Dermatology textbooks (e.g., Fitzpatrick's Dermatology, Bolognia's Dermatology)
- Medical image databases (DermNet NZ, VisualDx)
- Your institution's dermatology teaching files