I don’t know what type of cancer Sandi had but I did read it had spread from her lungs to other parts of her body… so I will take a wild guess and say it started in her lung(s).
You can read more about her story here.
Sandi also recommends reading this book to learn more how cancer begins and why B17 kills cancer cells without damaging the rest of the body.
Be well and stay informed!
Inge
rectalcancermyass 
Thank you for sharing.