ASCO: You’re listening to a podcast from Cancer.Net. This cancer information website is produced by the American Society of Clinical Oncology, known as ASCO, the voice of the world's oncology professionals.  The purpose of this podcast is to educate and to inform. This is not a substitute for professional medical care and is not intended for use in the diagnosis or treatment of individual conditions. Guests on this podcast express their own opinions, experience, and conclusions. Guests’ statements on this podcast do not express the opinions of ASCO. The mention of any product, service, organization, activity, or therapy should not be construed as an ASCO endorsement. Cancer research discussed in this podcast is ongoing, so data described here may change as research progresses. In this podcast, Cancer.Net Associate Editor for Lung Cancer, Dr. Charu Aggarwal, and Cancer.Net Specialty Editor for Thymoma, Dr. Ryan Gentzler, discuss what people with early-stage non-small cell lung cancer should know about their treatment options before and after surgery, called neoadjuvant therapy and adjuvant therapy, respectively. Dr. Aggarwal is the Leslye Heisler Associate Professor of Medicine in the Hematology-Oncology Division at the University of Pennsylvania’s Perelman School of Medicine. Dr. Gentzler is a thoracic medical oncologist and Associate Professor of Medicine in the Division of Hematology/Oncology at the University of Virginia (UVA) Comprehensive Cancer Center. View disclosures for Dr. Aggarwal and Dr. Gentzler at Cancer.Net.  To begin, Dr. Gentzler will discuss what people with early-stage non-small cell lung cancer should know about neoadjuvant treatment options before lung surgery. Welcome, Dr. Gentzler. Dr. Gentzler: Hi, this is Ryan Gentzler from the University of Virginia. We're here to discuss the role of neoadjuvant chemotherapy and immunotherapy for the treatment of locally advanced non-small cell lung cancer. So first, I thought I'd address some of the data and definition of what is neoadjuvant treatment. So when we think about treating lung cancer that is not metastatic, that is earlier stage disease, there typically involves multimodality treatment. Sometimes these lesions or tumors can be very small and can be stage I and treated with surgery alone or perhaps radiation alone and no further treatment is needed. But the vast majority of lung cancers that are considered early stage are in fact either larger tumors, involve lymph nodes, and typically fall into the category of stage II or III lung cancers. And these are cancers that often require multiple treatments beyond the local surgery approach alone. When we think about how we deliver that treatment, it can either be given before surgery or after a surgery. If we give treatment before a surgery, we call that neoadjuvant. If it is given after the surgery, we call that adjuvant. And most of the data that we have today in lung cancer uses one or the other of these approaches, and we don't typically give treatments both before and after, at least in terms of the chemotherapy part of that treatment. Historically, most of the data exists in the adjuvant treatment of lung cancer going back several decades that showed that the benefit of chemotherapy after a surgery, particularly for those with stage II and stage III lung cancer, derived a clear benefit of survival by giving chemotherapy after surgery. More recently, with the advent of immune therapy, which we have used in patients with stage IV lung cancer as well as those with stage III lung cancer who cannot undergo surgery, those immunotherapy drugs have been shown to improve overall survival and improve clinical outcomes for a wide range of patients with more advanced disease. And so in the last 4 or 5 years, we have really looked at new trials that have added immunotherapy in what we call perioperative space, either before surgery or after surgery for those that have surgically resectable disease. I'm going to focus o