As research advances, we are seeing just how important it is to diagnose not only lung cancer, but also its partcular subtype. These refined diagnoses are proving helpful in identifying the most effective treatments, and critical in combating cancers that have grown resistant to certain drugs. In this video, Dr. William Pao from Vanderbilt Ingram Cancer Center talks about what we're learning about lung cancer subtypes, drug resistance, and what research is showing will help to combat them both. He also gives information on what types of tests help doctors properly categorize lung cancer subtypes. Watch now.