>> reporter: today the majority of mcelroy's patients have brain or spinal issues. >> when i walk in on the ward, it is actually a dream for me. i know exactly how they feel. >> reporter: dr. sanjay gupta, cnn, reporting. i was working in the yard, my chest started hurting and i thought, well, you need to go to the doctor. i was told that is was cancer, and i called cancer treatment centers of america. dr. nader explained that they can pinpoint the treatment. once we identified that there was this genetic abnormality in her tumor, we were able to place her on very specific therapy. our individualized care model gives each lung patient specific treatment options with innovative procedures that are changing the way we fight lung cancer. we have excellent technology that allow us to perform very specialized procedures for patients who have lung disease. to learn more about these targeted therapies and