Urinary-system tumors can start in the kidney, ureter, bladder, prostate, or urethra. Most grow quietly at first, so blood in the urine or stubborn pee changes are often the first clues that something is growing where it shouldn’t.

Painless blood is the red flag. Urine may turn pink, tea-brown, or contain small clots, and it often looks clear between episodes.

Stream changes follow. The flow becomes thin, forked, stops and starts, or drips long after you think you’re done.

Urgency and frequency climb. You dash every hour, yet only a small amount comes out each time.

Obstruction pain shows up. A deep, dull ache below the ribs or above the pubic bone can throb and shoot into the groin if the tumor blocks urine flow.

Weight loss, night sweats, or constant fatigue may appear if the cancer has spread beyond the urinary tract.

Late signs include a lump you can feel (in the neck, side, or scrotum), leg swelling, or bone pain—an alarm that the tumor has moved far.