Scaly papules in sun-exposed areas
A man aged 44 years presented to the dermatology clinic with an eight-month history of an asymptomatic progressive rash on his arms and legs. He had never experienced any similar rash previously nor had anyone in his family. Scattered erythematous scaly papules on the patient's bilateral dorsal forearms and lower legs were noted on physical examination. The patient did not have any findings on his face or trunk. The papules ranged in size from 3 mm to 8 mm, and a very thin, raised, threadlike border was perceptible on some lesions.