A 60-year-old man with a history of well-controlled hypertension and no family history of malignancy presents with persistent asymptomatic microscopic hematuria detected on routine urinalysis. The patient denies any recent trauma, vigorous exercise, or urinary tract infections. He is a non-smoker and reports no other symptoms such as dysuria, urgency, or flank pain. His renal function is normal, and a urine culture is negative. A CT urography reveals no abnormalities in the kidneys or upper urinary tract. What is the next best step in the evaluation of this patient’s hematuria?
