throat cancer

I friend of mine passed 2 years ago of nasal pharngeal cancer.After having all trreatments available he was terminal. The cancer had spread to the back of his eye which deformed his eye and side of face.. Why was this and does anyone know where on the internet i can bring up what this does to your outer face and the appearance of it since i didnt see my friend when he passed?Also does anyone know if sniffing drugs(coke) the likes can cause this?Also to all of you who have contributed to this site God bless you all because i understand its a terrible thing to go through. Keep up the good reports. Please respond.  thanx karena