Irish-Texan community rally behind young Irish boy with a rare form of cancer

John Glynn with his son Gavin

Support has also come from the 2013 Rose of Tralee, Haley O'Sullivan, who is a native of Texas. O'Sullivan along with her partner, David Devlin, set up a local fundraising campaign to help the family with treatment and all the other expenses associated with their stay in the U.S.

Super Gavin

Despite the set-back in Gavin's recovery, John says "We hope we are over the worst of it now."

As for Gavin, despite his grave illness and the long recovery he must now endure, the 4-year-old continues to wear a smile. According to his father, he has even picked up a few American sayings. Staff and patients alike have grown accustomed to having this brave Irish boy remind them to "have a nice day."

Follow Gavin’s story on FB/ TeamGavinGlynn or visit their website