Yes, the continuing presence of stones can cause micro-hematuria. Other things that can cause hematuria would be infection, kidney disease, prostate problems, or bladder disease.
Of course, bladder cancer would be the condition you wouldn't want to miss, and I would consider a cystoscopy to evaluate for this. Other considerations would be a prostate exam, urine cytology (again looking for bladder cancer), or kidney ultrasound.
It may be possible that bladder cancer may have been evaluated for during the stent placement, but I cannot be sure without being more familiar with your record. The cystoscopy would be the most comprehensive test.
I would discuss these options with your personal physician.
Followup with your personal physician is essential.
This answer is not intended as and does not substitute for medical advice - the information presented is for patient education only. Please see your personal physician for further evaluation of your individual case.
Kevin, M.D.
Medical Weblog:
kevinmd_b