Hematuria is the abnormal presence of red blood cells in the urine (>3-4 RBC). Hematuria is divided in two categories:
- Microscopic Hematuria : Red blood cells in the urine are visible only with the microscope in the general urinalysis.
- Macroscopic Hematuria (Gross Hematuria): There is such a large number of red blood cells in the urine that the urine is red-coloured.
There are numerous causes associated with hematuria. Some of these are:
- Urinary tract infection (UTI)
- Prostatitis (in men)
- Heavy physical exercise
- Urinary tract Injury
- Pharmaceutical agents, such as anticoagulants (heparin, aspirin) or immunosuppressants (cyclophosphamide)
- Cancer of kidneys, bladder, prostate