You can show it to your brother though - it will help him understand why you are not recommended for surgery.
The site is American and not so many UK hospitals are using the new grading systems mentioned here but they do make sense and will no doubt become more common. Whichever grading system is used, John would have come out of diagnostics as T1a or grade 1 but once they opened him up he was upgraded to T3b. He was 50 as well.