ecthyma /ek″thimə/ [Gk, ek, out, thyein, to rush] , an ulcerative pyoderma characterized by large pustules, crusts, and ulcerations surrounded by erythema. It is caused by a streptococcal infection after a minor trauma. The skin of the legs is most frequently affected. Treatment includes vigorous cleansing, application of compresses of cool Burow’s solution to soften and remove crusts, and systemic administration of antibiotics. Compare folliculitis, impetigo.
