Hematuria in urine, when it is done with a cathater there is no blood, test was done by an ER Doctor. He also did a blood test for a disease of the muscle since he said that could cause the hematuria, came back negative. I have had a CAT Scan, MRI and an ULtrasound all came back ok, do you know what would cause the hematuria, one urologist thought it could be non bacterial cystitis is there anything else?