Ha!! We were just talking about this a week or so ago. I had said I think I hold some sort of a record. I kept mine for 15 years after I was done with treatment. My first one quit working, so it was taken out of the left side, another was put in the right side. I was told if it quit I was out of sites to use unless they went to my groin area, I didn't want any part of that. So I kept saying, no, I'll just keep it a while longer, "just in case" each time a doctor wanted to take it out.
I finally let it out a few years ago. Then I was diagnosed about 3 years later for my 3rd time. Luckily, no chemo this time.