Hi @rociovega, I would ask the pediatrician for referrals, oncologists for children, if available. Take it easy and study options. My friend (with another cancer, non curable) heard from a neighbour her mother had gone to a Doctor "xx" and recovered. I checked his name with friends and my clinical doctor. They all said that guy is a NO NO. He gives placebo and sells "hope". So thank god I could stop that nonsense.
Desperate is not good.
Go to doctors referred by doctors you trust.
Hope this helps, get two or three opinions. Sending all my love.