Complete remission of refractory dyshidrotic eczema with the use of radiation therapy.

Dyshidrotic eczema is a chronic, enigmatic condition that usually affects the hands and feet. Modern-technique radiation therapy using megavoltage equipment for the treatment of dyshidrotic eczema has not been described in the literature before. A dramatic clinical response to low-dose external beam radiation therapy was observed in a patient refractory to multiple forms of topical and systemic agents. Complete resolution of this severe presentation of dyshidrosis occurred within 1 month following therapy, with a durable response at 6 months. Withdrawal of oral steroids, without flare of disease, was possible after 6 weeks, with the patient remaining free of medication at the 6-month interval. Complete remission of severe dyshidrotic eczema is achievable using low-dose external beam megavoltage therapy in situations where other forms of conventional therapies have failed. Lasting remission may allow for the complete withdrawal of oral or topical agents, which may become harmful with chronic use.