Gonzalez AN, et al. - A total of 2118 individuals were examined to the prevalence of bladder cancer during cystoscopy for asymptomatic microscopic hematuria (AMH). They recorded age, gender, smoking status, history of pelvic radiation, and the number of red blood cells per high power field on urine microscopy. About 1.2% of the total cases were diagnosed with bladder cancer (non-muscle invasive urothelial carcinoma). They noted a positive association of older age (more than 50 years) and smoking history with an incidence of bladder cancer.