Hi 42istheanswer,
It is funny how we put such importance on milestones like 5 years. I was diagnosed with breast cancer in sep 2006 followed by chemo, mastectomy and radiation treatment. Then life went on as normal as it can after a cancer diagnoses. Then at my 4 1/2 year check, June 2011, we found bone mets and I also now have liver mets.
It's funny how I feel that just 6 more months and I would have made it but really it would be no different, I was obviously meant to get it back, and think I'd had for a while but it hid very well.
Celebrate your 5 year mark however you like, some people get tattoos, others throw parties others just let it slide by. I love hearing and reading the stories of those who get to that cancer free mark as it gives so much hope to all those fighting this awful disease. So if you want to celebrate, do so for you, your loved ones and those battling cancer.