Sedonadreaming, you might ask about PET/CT surveillance over the following years. My cancer was different than yours but I've been saddened by distant metastasis of breast cancer among friends. I struggled to understand how it could happen. But follow-up especially after five years seem to be non-existent. I've had to press for the imaging that would detect it. A mamogram can't detect brain metastasis. The oncotype will help determine where a metastasis is most likely.
Hello to your handsome devil and best luck