Deep dive on the pros & cons of using IBM's #Watson to help treat cancer, and the huge challenges involved: https://www.statnews.com/2017/09/05/watson-ibm-cancer/
tl;dr: it's still in its infancy, basically Sloan-Kettering Cancer Center in a box (with docs from there feeding it all it knows sort of like Mechanical Turk workers), with all the problems and biases that implies, but it's got a lot of promise treating people in areas with no oncology experts