The blood in urine probably relates to your bladder.....as you had the recent growth removed it may be this area which could have developed an ulceration instead of healing as it should... There could be an AV malformation that developed ( artery grows directly to vein...these can expand and burst )
Any chemo as part of your treatment ???
Some treatments may inflame the bladder wall and cause slouching of tissue --- hemorrhagic cystitis ...
These are some possible causes
You need follow up without delay if you have active bleeding now ..
Risks to you could include excess blood loss and clots in the bladder which could block the outflow of urine ...
You may need irrigation of the bladder ...
You may need to go to ER if that is the most available option for you now...
I hope that this information is helpful for you
Let me know if you have further questions or concerns
I will be happy to get back with you
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Thank you and Best Regards,
Anthony Bray MD