MKSAP: 26-year-old man with back pain
Test your medicine knowledge with the MKSAP challenge, in partnership with the American College of Physicians.
A 26-year-old man is evaluated during a follow-up visit after presenting to an urgent care clinic for back pain 1 week ago. Laboratory studies at that time were significant for a serum creatinine level of 1.4 mg/dL (123.8 µmol/L); other laboratory studies, including urinalysis, were normal. A …