Invisible blood in urine may indicate bladder cancer

(University of Exeter) Scientists at the University of Exeter Medical School found that one in 60 people over the age of 60 who had invisible blood in their urine -- identified by their GP testing their urine -- transpired to have bladder cancer. The figure was around half those who had visible blood in their urine -- the best known indicator of bladder cancer. However, it was still higher than figures for other potential symptoms of bladder cancer that warrant further investigation.