. >> they were both diagnosed one day apart from each other with acute limbo blass particular leukemia of the most common cancers in kids. they have been through spinal taps, bone marrow transplants, every process of their recuperation. >> it looks like they lost their hair together. >> yes. >> the thing is, i mean, this is so scary, it's such a scary disease for anybody. imagine how scary it is for a little kid. it must be really nice to have somebody else around the same age to go through this, to battle this thing together. >> even their moms have become friends. >> she is like a sister to me. >> we've definitely developed a lasting bond with them. forever. i mean, we feel like we'll be friends for the rest of our lives. >> i told you! >> i can take it. >> they're no longer living at the hospital. add son will have to continue going for chemotherapy for one more year. >> wow. >> he did say he misses her when she is not there when he's getting his chemo. one of my favorite parts of this story is at the very end. >> like, one of my old sayings, if it's one of your worst feared place,