MASTIC BEACH - A community is coming together to help a Long Island toddler who's battling a rare form of liver cancer. Johnathan Cahill is just 2 years old, but he's already been diagnosed with stage 4 liver cancer. His mother, Amy, says it's a very aggressive, fast-moving cancer. Doctors started the child on chemotherapy the very same day he was diagnosed, and last month, surgeons removed part of his liver. Aside from the emotional stress, the illness has taken a financial toll on the family, too. Both of Johnathan's parents can't work because their days are spent caring for him. They travel from their Mastic Beach home to Manhattan twice a week for chemotherapy treatments. The Cahill's older daughter, Sarah, decided to take action. She created a Facebook page called Hope for Johnathan, with information and photographs of her little brother. She has also posted information on a fundraiser they're having later this month to help cover the mounting medical bills. The Facebook page has been helpful in other ways, too: hundreds of letters from strangers around the world are giving the family hope that one day, Johnathan will be cancer-free.More information: Hope for Johnathan