A topic that came up in a recent expert round table case discussion was the issue of how to manage a patient with a lung cancer for which the pathology report says "NSCLC not otherwise specified (NOS)", or "poorly differentiated NSCLC, NOS". What does this actually mean, and what does it mean in terms of treatment options?

I had the opportunity to sit down with Dr. Matthew Horton, a pathologist who works with my own group at Swedish Cancer Institute in Seattle, at a pathology company called CellNetix. He did subspecialty training in lung pathology and is a terrific resource for my colleagues and me, and now for a wider audience.