My old boss had quit smoking at age 50, but by age 70 (he was still our CEO) he got lung cancer and it did metastize to his brain. And killed him.
“It sounds like these were discrete tumors, so a different type of cancer.”
It seems a bit morbid to speculate but it seems odd they would perform a risky operation on a 85 year old to remove
2 tumors. Seems more likely they were checking for the presence of Cancer.