Cameron, a 37-year-old man, presents with a four-month history of urinary frequency, urgency and intermittent haematuria, and says he has experienced night fever of about 38°C for the past three weeks.

There are no associated symptoms of dysuria, flank pain, or stone passage.

He explains that he was treated with antibiotics for a presumptive urinary tract infection two months ago, but there has been no change in his symptoms.

He denies any history of preceding trauma, bruising, or urinary tract infections.