I work in Pathology, when I heard the diagnosis I was gutted.
If a full recovery is made I'm sure that details of the natural therapy treatment will be voiced through various media channels.
I have watched the video of the father treating his child. That video among other stories of thc oil therapy treating cancers was used to help sway his parents mindset as like your niece, my friend is in his twenties.
I have seen how quickly people get ill after starting chemotherapy. nausea, vomiting, leading to poor nutrition which is most important when healing. My friend has never looked better.
I give him a lot of credit for going down this road so confidently much to a lot of shock and horror from the medical staff. They were very surprised by the tumors reduction in size.