Undetectable HDL Cholesterol in a Patient with Flu-Like Illness.

An 85-year-old man presented to his family physician with complaints of generalized weakness, fatigue, loss of appetite, excessive sleeping, and mild laryngitis. He reported that his temperature taken orally at home that morning was 102.6 °F. These symptoms arose during the previous week, before which he had been healthy, exercising vigorously every day. His past medical history included type 2 diabetes, hypercholesterolemia, and Paget disease of bone, and medications included metformin and pravastatin. One year earlier he had a tick bite followed by appearance of a bullseye rash and took a course of doxycycline. He was not symptomatic after that and was not known to have any additional tick bites. He lived in Long Island, New York, and did not have a history of travel or sick contacts.