Clinical Challenge: A Pruritic Eruption on the Arms and Trunk

The patient is a 27-year-old male who presents for evaluation of a minimally pruritic eruption affecting his arms and trunk. The rash is greater than 2 weeks in duration and has not responded to 1% hydrocortisone cream. He denies fever, malaise, and swollen glands, and he takes no oral medications. Examination reveals scattered erythematous papules of the affected areas, some ...