For 1 week, a 77-year-old man had a fever and a tender, nonpruritic rash on both palms (Figure 1) and on the anterior aspect of both knees (Figure 2). Two weeks earlier, he had hives, which ameliorated after a 10-day course of cetirizine and a tapering course of prednisone. He also had headaches almost daily for the previous 6 to 8 weeks.
