steve pattison spoke to the family. >>> all too often. the steps here at the art museum are the ones we take for granted. >> but for 13-year-old sean these 72 steps represent a year and a half to live with a battle of cancer. >> you got your life on the line. you got everything to lose. and. >> reporter: hard to believe just a few months ago this life of the party teenager was staring death in the face. >> chemo surgery i think four more rounds of chemo, transplant two more round of chemo. >> it's an 18-month blur. she remembers when he came down with a stomachache that doctors identified at stage three neuroblastoma the moment when childhood was put on hold. >> at first he was ticked off and he'll tell you. then he said let's go. >> reporter: 18 months at children's hospital for chemo isolation and radiation lost birth days and -- this was the goal. >> i tell people all the time when i grow up hopefully i'll be half as strong as he is. >> reporter: sunday not a fund raiser or dedication, just celebration, with cancer now in remission, th