Hi,
Have you read Tom and Alana's story? She was dxed while pregnant, but with a more aggressive tumor type, and they also waited:
blcwebcafe.org/stories/young_tas.asp
I know that uros can be very accurate at guessing what type of bladder tumor they're looking at (aggressive or not)...but the only study conducted used people who had already been diagnosed and had a recurrence, thus the doctors had some clue as to what the history was.
If your sister is up to having another cystoscopy I'd say it might be wise to get another opinion. Opinions differ, experience really counts, and 2nd opinions are standard when the diagnosis is cancer.
Perhaps nothing would change as per the current advise to wait, skip a biopsy, yes she would need to be put under for that....so....
I'm sorry to read about yet another young woman who is pregnant get diagnosed with bladder cancer. Though rare, she is not alone, and like Alana did, she will almost certainly get through this and be fine.
There is some interesting new info about "watching and waiting" instead of immediate treatment for low grade, Ta (or T0) tumors, here:
blcwebcafe.org/superficialblca.asp
Keep in touch,
Wendy