ABSTRACT
A 25-year-old Caucasian man visited his GP complaining of pain in his lower back and passing red blood in his urine. He had no dysuria or fever. He is generally fit and well, working as a mechanic. He takes no regular medications and has no significant medical history. He does not smoke or drink alcohol. There is no family history of relevance. His only other complaint was of cold-like (coryzal) symptoms for the past few days.
