Hello,
Microscopic hematuria can be due to urinary tract (bladder) infection, swelling in the filtering system of the kidneys ,stone in bladder or in a kidney, blood disease, like sickle cell anemia, certain medicines and tumors in the urinary tract.
You may need a series of investigations like urine examination, urine culture, ultrasound or cystoscopy (already done in your case) to confirm the diagnosis. Please consult a urologist and get it done.
I sincerely hope that helps. Take care and regards.
Hello Dr. Thanks for your reply. I have undergone Urine cytology, culture as well. My urologists asked me to visit after 1 yr. But I'm worried as the underlying cause is no found.