In the USA, its unlikely you will find a physician who will help if they do not have the patient in front of them. The doctor would need to run tests and give a full exam after asking your brother many questions. Any diagnosis without those steps would open up physicians and/or hospitals to lawsuits. We also have strict privacy laws that prevent a medical professional or treatment facility and its staff from discussing a patients medical history with anyone without specific signed forms on file.

Oral cancer is eliminated thru either surgery or radiation with or without chemo. By itself, chemo is used for palliative purposes. Chemo can shrink a tumor but will not completely eliminate it. Some patients with recurrences after previously treated with radiation can have radiation again. That is done on a case by case basis. The second round of rads is usually a lighter dose.

Im sorry but I do not know more about how patients from other countries can come to the US for medical treatment. Best wishes with everything.