Q. A 25-year-old man comes to the physician’s office for multiple white patches on his back for the past 3 days. He does not complain of itching or other symptoms but noticed scales sometimes falling off from the lesions. He never had these patches previously. There is no history of a similar illness in his family. His temperature is 98.4°F (36.9°C), pulse is 87/min, blood pressure is 110/70 mmHg, and respirations are 15/min. Upon Physical examination, there are multiple non-erythematous, hypopigmented macules on the back. The lesions appear rounded and are less than 1 cm. In some locations, the lesions are confluent. The lesions produce scales when scraped, but the scales are not profuse. No other types of lesions such as vesicles, papules, or pustules are noted. Skin in the rest of the body appears normal. The mucous membrane is intact. What is the best next step in this patient’s management?