Hematuria
It is the clinical name of finding blood in the urine. Hematuria can be of two types: gross hematuria and microscopic hematuria. When patients can see blood or clots in the urine, that is gross hematuria, but when blood cannot be seen in the urine by the naked eye, and blood cells are detected under a microscope, that is microscopic hematuria. In bladder cancer, there is a classic presentation of blood or blood clots present in the urine, which is visible with the naked eye but usually painless and occurs in above 90% of patients.