Shacky73
Unfortunately and disappointingly it happens. It happens in the best of places. You are wise to keep copies of all your reports - pathology, cytology, TURBT, blood values etc - and be proactive is asking about changes in reports.
The change from "Muscularis propria is present and uninvolved" to "No muscularis propria is present for evaluation" raises serious questions of procedures at the pathology lab. I hope you will at least get a letter from the lab explaining the cause of the change in the report, and what triggered such a late revision of the report. We count on these providers to support critical decisions.
Your signature line notes T1 and CIS, neither of which are noted in the report sections you cited. It may be necessary to compare the FULL reports to get the full meaning of the change. Ask about the changes, direct your questions to the treater and pathology provider.
Path labs are not perfect. Interpretation of tissues involves some opinion and judgement - often a report includes terms such as "most similar to", "there is support for", or "additional material is needed for a complete evaluation". Uncertainty needs to be identified, but complete reversal of stated finding months later is hard to justify.
I do hope that your new treater has received both reports and is s basing her/his opinion on your current situation.
Hang in there, you are helping yourself by being aware and advocating for yourself.
Best,
Jack