Which finding is a red flag that requires urgent evaluation for hematuria?

• A. Intermittent microscopic hematuria without anemia
• B. Occasional nocturia
• C. Visible gross hematuria with clots
• D. Mild dysuria without blood

Answer: (C)

The key idea is that visible, gross hematuria with clots signals active, significant bleeding that can obstruct the urinary tract or indicate serious underlying problems, so it needs urgent evaluation right away. When blood is seen spilling into the urine and there are clots, the bleeding is usually more than a benign, fleeting finding and could come from the kidneys, ureters, bladder, or nearby structures due to stones, tumors, infection, or trauma. This prompts prompt diagnostic workup—urinalysis, assessment for anemia, and imaging or urology consultation—to identify and manage potentially dangerous causes quickly.

In contrast, intermittent microscopic hematuria without anemia often warrants observation or a less urgent workup, nocturia is more about urine production or sleep issues rather than bleeding, and mild dysuria without blood points to irritation or infection but not active bleeding.