I have stage 3 ckd. My urine tests have always showed no protein or blood but this time my urine is positive for blood. My doctor has ordered an appointment with a urologist for a cystoscope. Why? No explaination given. In many articles that I have read having blood in your urine is a symptom of kidney disease. So why the cystoscope? Has anyone else experience this? Thank you for responses! Wishing each of you all the best in coping with the many entities of ckd.