An 11-month-old boy with widespread itchy, crusted, and weeping plaques.

An 11-month-old previously healthy boy presented with a 1-month history of widespread itchy, crusted, weeping plaques (see Figures 1 and 2). Two weeks before presentation, he was admitted to a nearby hospital for “superinfected eczema” and improved after systemic antibiotics and a 5-day course of systemic corticosteroids. However, his rash and intense itching recurred within a few days of stopping the medications. On presentation to the emergency department, he was afebrile and his weeping plaques were symmetrically distributed over the extensor upper arms and posterior legs. He also had scattered pink papules and ill-defined patches on his posterior trunk. He did not carry a previous diagnosis of atopic dermatitis or asthma and had no known allergies. A bacterial culture obtained from weeping areas on the thighs was negative. What is the most likely diagnosis? A) eczema herpeticum B) streptococcal superinfection of atopic dermatitis C) tinea corporis D) contact dermatitis on the extremities.