From the record, Steve Job has had been diagnosied with cancer for many years before his demise. Either, he has been seeking treatment of USD50,000 a pop or not, we knew that he has been on strict vegetarian diets. And definitely I can safely bet it has No MSG added and low salt. His famous quote was "stay hungry, stay foolish" and he was smart enough to stay alive longer with his food regime.
Cancer is simply the cell goes bad and affect the other cells in the body immune system. But then some individuals like Deng Xio Peng didnt died of lung cancer even though he is a cigar smoker. In fact, he outlive many people.
The surgeon which my brother was sent to for a endoscopy examination prior to the surgey done by Dato Suseela Nair at IPoh GH ironically died from the same causes of colon cancer! He was in his 50's.