Dr. Shaalan Beg, of UT Southwestern’s Harold C. Simmons Comprehensive Cancer Center and Science 37, discusses hot topics in GI oncology, including KRAS wild-type pancreatic cancer, the SURF-Cohort trial in hepatobiliary cancer, and key studies in gastric cancer featured at the 2022 ASCO Annual Meeting.  Transcript ASCO Daily News: Hello and welcome to the ASCO Daily News podcast. I'm Geraldine Carroll, a reporter for the ASCO Daily News. My guest today is Dr. Shaalan Beg, who is an adjunct associate professor and gastrointestinal (GI) medical oncologist at UT Southwestern Harold C. Simmons Comprehensive Cancer Center.  Dr. Beg also serves as vice president of oncology at Science 37. Dr. Beg will be telling us about key posters in GI oncology that will be featured at the 2022 ASCO Annual Meeting. His full disclosures are on our show notes and disclosures of all guests on the podcast can be found on our transcripts at asco.org/podcasts.  Dr. Beg thanks for coming on the podcast today.  Dr. Shaalan Beg: Thank you so much for having me.  ASCO Daily News: Let's begin with “A multicenter, non-randomized, controlled trial to evaluate the efficacy of surgery versus radiofrequency ablation for small hepatocellular carcinoma (SURF-Cohort Trial): Analysis of overall survival.” That's Abstract 4095. This study evaluated the efficacy of surgery versus radiofrequency ablation for small hepatocellular carcinoma. So, what are your key takeaways from this study?  Dr. Shaalan Beg: This is a very interesting and timely clinical trial from our investigator colleagues in Japan, Dr. Yamashita, and colleagues, where they evaluated the effectiveness of radiofrequency ablation versus surgery for patients with small hepatocellular carcinomas who have a good liver function.  History is that the best most effective treatment option has always been surgery and we know that ablative techniques like radiofrequency ablation (RFA) or stereotactic radiation can do a good job in controlling the individual cancers, but we don't know what the long-term effects can be in terms of recurrence, free survival, and overall survival.  So, this trial looks to compare RFA or radiofrequency ablation versus surgery for groups of patients who have a good liver function, so a Child-Pugh score of 7 or less, and those who had no lesion greater than 3 centimeters and less than 3 hepatocellular carcinoma (HCC) nodules.  All the people were evaluated by surgeons and hepatologists, to confirm that they would be eligible for both procedures. And then the patients received either 1 of those treatments and they followed them in the long term and found that there was no significant difference between how people who are treated with surgery fared versus RFA.  This is really interesting and practical and timely because the results of these clinical trials can inform our clinical practice today. The median follow-up period was 6.8 years in the surgery group and 6.7 years in the RFA group and the overall survival was not different. Their 5-year overall survival for surgery was 79.7%. And very similar to what they were seeing in both groups.  ASCO Daily News: Excellent! Great to hear some promising developments for this patient population. Well, in Abstract 4026, investigators are suggesting that the choice of PD-L1 immunochemistry assay influences clinical eligibility for gastric cancer immunotherapy. What are your thoughts on this study?  Dr. Shaalan Beg: Yeah! Clinicians, clinical investigators, and even patients have been really confused by the definitions of PD-L1 expression. PD-L1 expression is 1 of our biomarkers for response to immunotherapy and immune checkpoint inhibitors. But the challenge in this field is that there are multiple assays that define various criteria for PD-L1 expression. And if you look at different clinical trials, they look at different definitions of positivity. So, a trial may have 1 plus. Some may have 5 plus percent. Some have 50 plus