Research Highlights from ESMO Congress 2022, with David Ilson, MD, PhD, FASCO, Sumanta Pal, MD, F...

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In this podcast, Cancer.Net Editorial Board members discuss new research in gastrointestinal and genitourinary cancers presented at this year’s ESMO Congress, held September 9-13 in Paris, France.


First, Dr. David Ilson discusses treatment advances in liver, colorectal, and gastric, or stomach, cancers. Dr. Ilson is an attending physician and member at Memorial Sloan Kettering Cancer Center and a professor of medicine at Weill Cornell Medical College.


You can view Dr. Ilson’s disclosures at Cancer.Net.


Dr. Ilson: Hi, I'm Dr. David Ilson from Memorial Sloan Kettering Cancer Center in New York. I'm a GI medical oncologist, and it's my pleasure today to review some important presentations in GI cancers from the recent ESMO meeting in Paris from 2022. I have no relevant relationships to disclose for this discussion. So, important presentations were made in hepatocellular cancer, in colorectal cancer, and gastric and other cancers, and I'm going to highlight some of the key presentations from the meeting. 


One of the most anxiously awaited presentations was one in hepatocellular or liver cancer. For patients that have advanced disease who are not candidates for surgery or local treatments, standard therapy now, it used to be lenvatinib and sorafenib, and that's now been replaced by the combination of an immunotherapy drug, atezolizumab combined with the drug bevacizumab. That's the new standard of care. And recently, we had a promising data for another immunotherapy combination using the drug durvalumab combined with tremelimumab.


So what we saw this year was another important global study looking at the first-line use of immunotherapy in hepatocellular cancer. This trial took 794 patients with advanced hepatocellular cancer and assigned them to a standard treatment with a drug called lenvatinib. Lenvatinib and sorafenib were the old standard treatments for hepatocellular cancer. And lenvatinib alone was compared to a combination of lenvatinib and pembrolizumab, an immunotherapy drug. The primary endpoint was to see whether adding immunotherapy to lenvatinib improved survival. And this was a negative trial. It did not show an improvement in survival for adding pembrolizumab to lenvatinib over lenvatinib alone, and there was really no significant difference in the time that patients were on treatment. The response was slightly higher with the addition of pembrolizumab to lenvatinib, but again there was no survival difference. So this combination will not move forward. And again, as I said earlier, the new standard first-line treatment is atezolizumab plus bevacizumab.


In colorectal cancer, probably one of the most exciting presentations was the use of immunotherapy treatments in locally advanced colon cancer. There is an important subset of colorectal cancer that has what's called an MSI-high status. MSI-high colon cancers are very responsive to immunotherapy drugs, and there has been a lot of interest in patients with localized colorectal cancer using immunotherapy drugs prior to surgery rather than conventional chemotherapy or radiation. So this important trial looked at 112 patients with localized colorectal cancer. Most of the patients were stage 3, and they all were documented to have this MSI-high status, which indicated a higher chance of response to immunotherapy. And patients received a brief course of immunotherapy, 2 doses of the drug nivolumab combined with 1 dose of ipilimumab over only 6 weeks followed by surgery. What they showed in these 112 patients who went to surgery, there was almost 100% response to this treatment. In fact, almost two-thirds of patients had no cancer found at surgery, even only after several weeks of immunotherapy. And in the 112 patients treated, there have been no recurrences in any of these patients.


So it's quite remarkable that immunotherapy could induce a complete remission in two-thirds of patients, and that was only after a few weeks of exposure of the drug. So I think we're going to see more interest in using immunotherapy treatments as a potential pre-surgical treatment for colon cancer. And we could argue with such a high rate of complete remission, if we gave imm...