Thanks for your query. You have noticed blood in urine after a surgery of removal of breast lump Please note that this is a coincidence and not related to surgery at all.Please get your routine urine examination and ultrasound
scanning done to rule out any UTi or any pathology in Kidney
(which is most unlikely).You seem to be over anxious about your problem and suspicious about having cancer of the either kidney or Bladder.Please consult some Urologist
to remove doubts from your mind.