A 23-year-old woman presents with a 2-week history of an intensely pruritic rash on the dorsum of her hands and along the extensor surfaces of her forearms. She reports frequent handwashing and has recently started using a new scented soap. Physical examination shows multiple erythematous plaques with a dry, flaky, whitish surface. The flaky material can be gently scraped off in thin sheets. No vesicles or pustules are noted. Which of the following best describes the secondary skin lesion seen on exam?