I am not sure why the urine
test was done. You had some symptoms? A high WBC in
urine and no culture can happen if the
UTI is caused by an organism that does not show growth on normal cultures. Certain special cultures are set up for them. Your urologist can help you with this.
In case you have no symptoms, then there is a possibility of error in the report. Maybe you should get a repeat test done.
Hope this helps. It is difficult to comment beyond this at this stage.