Hi, I am extremely worried. I had an episode of gross hematuria. I am 48 yrs. old. 120 lbs. blood pressure 115/81. I went to give a urine sample to the doctor the next day. It came back blood-large but no sign of infection. Doc said don t worry, it could be stones. It s been 10 days and I do not have pain and I don t believe I ve passed a stone or I would know it. She scheduled a CT scan and cystoscope but it s not for 3 more weeks. I m soooo worried. I am a smoker also. I read that kidney cancer that presents with gross hematuria is only in 10% of cases but when it does, the cancer is already advanced. The blood is the only symptom I have. If this where advanced cancer wouldn t I have the other symptoms too? I have had some minor abdominal pain and flank pain but it goes away. Is there anything else it could be besides cancer if it s not stones or infection? Also, I have had frequent urination for about 8 years. I always thought it s because I drink a lot of Dr. Pepper. My PSA was low a few months ago.