Hello and welcome! I know you don't want to join our rather exclusive
club, but we have all been in a situation very similar to yours.
First, I assume that the procedure you had was done under anesthesia and is called a TURB (transurethral resection of the bladder.) The urologist does two things; remove as much of the mass as he can and obtain samples to send to the pathology lab. UNTIL THE RESULTS COME BACK FROM THE PATH LAB NO ONE CAN TELL FOR SURE WHETHER IT IS CANCER OR NOT. It is very likely that he will have the results during your appointment Thursday since it takes about a week.
As for what it could be? it could be a cyst, or a benign growth, or bladder cancer. IF it is cancer, it has the "choice" of being high grade or low grade. The pathology report should also indicate, if it is cancer, whether it is still contained in the bladder lining or if it has spread into the underlying layers or the muscle. Often if this cannot be determined from the biopsy samples a second TURB is scheduled so that this can be examined.
What happens next depends on the diagnosis. If it is a cyst or benign growth....probably nothing. If it is low grade cancer you probably will be scheduled for cystoscopy exams every three months for a while to be sure it doesn't return. If it is high grade but still localized there are other options. As they say IT ALL DEPENDS.
Let us know what the results are....and best of luck!!
Sara Anne