Chronic palmoplantar pustular psoriasis (PPP) is a disabling condition characterized by recurrent crops of sterile pustules on a background of erythema, fissuring and scaling. Genetic and environmental factors have been implicated in its etiology. Topical treatments are frequently ineffective although corticosteroids under hydrocolloid occlusion have been demonstrated to be useful. There is evidence supporting the use of systemic retinoids, PUVA and a combination of both. Oral tetracycline antibiotics may be helpful, but rarely clear PPP. Cyclosporine has been shown to be of some benefit at low doses. The choice of systemic treatments for an individual patient is influenced as much by their potential side effects as by differences in efficacy.
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