Many of you saw the press release from Merck announcing that their randomized trial comparing chemo with chemo plus pembrolizumab in the neoadjuvant setting led to improved event-free survival and also improved pathologic complete response rate.
This comes in addition to the data from the AstraZeneca trial with durvalumab saying they’ve already achieved their endpoint of higher pathologic complete response rate vs. chemotherapy alone and also the data with nivolumab from Bristol-Myers Squibb saying that nivolumab plus chemotherapy leads to a better event-free survival and a better pathologic complete response rate. That information has led to Food and Drug Administration approval for their regimen.
We’re running the table with these very positive data, and I think it’s just a sign that the approach is safe and effective.
A huge question has come up. I just came from a meeting of lung cancer experts asking what to do if you have a patient with a small tumor, for example, a 3-cm tumor. Do you recommend immediate surgery followed by adjuvant therapy, chemotherapy, and then a checkpoint inhibitor if appropriate? Or do you proceed with neoadjuvant therapy if appropriate? The truth is that it’s a very difficult decision.
We have overwhelming data that the neoadjuvant approach works for that patient. Please remember that this is a clinically staged patient. This is not the patient after their surgery, where I think we have a very clear path. We have adjuvant data and adjuvant trials for those patients.
For the patient who’s in your office with a small tumor or a small tumor and only hilar lymphadenopathy, the decision there isn’t data driven, but rather it is experience driven. The data that are out there right now suggest that neoadjuvant therapy is a better way to go. Why is that?
Well, I think that the first reason is that it is probably a better regimen. I think many of you saw the recent clinical trial by Patel and colleagues in the New England Journal of Medicine with melanoma. It was an interesting trial. They gave a checkpoint inhibitor for 18 doses after surgery for melanoma versus three doses of checkpoint inhibitor, surgery, and then 15 doses of the checkpoint inhibitor.
It was 18 doses versus 18 doses, with the only difference being the three doses before surgery. Lo and behold, the three doses before surgery led to a better event-free survival.
There are preclinical data in lung cancer demonstrating that the same thing is true. Tina Cascone published on that years ago. We could talk about why, but it appears that neoadjuvant is just better.
There are other advantages to it as well. I think a big one is that all the information shows that it’s better tolerated, so you’re more likely to give all the drug. You can see if the drug isn’t working, and you can stop the drug. Also, if the drug is causing a side effect, you can see whether it’s working or not and use that decision to stop. It’s different than when you’re giving a drug in the adjuvant setting where you don’t really know whether it is working or not.
I think that it’s time to change some of our standards. When patients appear with lung cancers other than tiny ones that might be detected through screening, you need to convene your multidisciplinary group. You need to weigh the pros and cons I think that it’s time to change some of our standards. When patients appear with lung cancers other than tiny ones that might be detected through screening, you need to convene your multidisciplinary group coming in. It’s already an FDA-approved regimen with nivolumab and chemotherapy, and I think we’re moving to making that our standard of care now.
The way to handle it today, though, is to convene your multidisciplinary panel about every patient other than those with the tiniest of lung cancers and put your heads together to see what the best treatment is for that patient.
Dr. Kris is professor of medicine, Weill Cornell Medicine, and the William and Joy Ruane Chair in Thoracic Oncology, Memorial Sloan Kettering Cancer Center, both in New York. He disclosed ties with Ariad Pharmaceuticals, AstraZeneca, Pfizer, PUMA, and Roche/Genentech.
A version of this article appeared on Medscape.com.