my mother has mouth cancer since she was 51. she is now 72.  she suffered devastating operation and her face is a PICASSO as she says herself to make me smile. i hope your dad will recover with the help of GOD and give you strength to assist him. 

 i also recommend you to follow the work of DR GIUSEPPE DI BELLA in his fight against the pharmaceutical companies. he and his father in italy have decades of experience in developing a therapeutic formula to help with cancer.