For NSCLC Neoadjuvant Adjuvant or Both

H. Jack West, MD, and Julia Rotow, MD, discuss data on perioperative approaches presented at ASCO 2023.

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H. Jack West, MD: I'm Dr Jack West. I'm a thoracic medical oncologist at the City of Hope Comprehensive Cancer Center in the Los Angeles area.

Julia Rotow, MD: I'm Dr Julia Rotow. I'm a thoracic medical oncologist at the Dana-Farber Cancer Institute in Boston, Massachusetts.

West: We're here at ASCO 2023 in Chicago, where we've been seeing some blockbuster presentations in thoracic oncology. Many of these have brought up some important questions about the clinical implications that we need to discuss further.

At ASCO, as well as in the couple or 3 months preceding ASCO, we've gotten more and more data on perioperative approaches. Of course, over the past couple of years, we've had some new options of postoperative immunotherapy for a year, say, after chemotherapy or possibly after chemotherapy.

We have also had very influential data, such as the CheckMate 816 trial that gave three cycles of chemotherapy with nivolumab vs chemotherapy alone to patients with stage IB to IIIA disease, but largely, nearly two thirds, with IIIA disease. That showed a very clear improvement in the pathologic complete response (pCR) rate with nivolumab added to chemotherapy, and also a highly significant improvement in event-free survival and a strong trend toward improved overall survival. This is FDA approved and has been increasingly adopted, I would say, maybe with some variability by geography and center, but really a good amount of enthusiasm.

Now, we have a bunch of trials that give chemotherapy with immunotherapy. We've got the AEGEAN trial with durvalumab. We have Neotorch with chemotherapy and toripalimab. At ASCO 2023, we had a highly prominent presentation of KEYNOTE-671, giving four cycles of chemotherapy with pembrolizumab vs chemotherapy and placebo.

Then there's the built-in postoperative component of a year of immunotherapy as well, in all these trials. The data for KEYNOTE-671 look quite good. Of course, the other trials also were significant. I would say the comparator now is not nothing or chemotherapy alone anymore; it's really against what is the best current standard of care.

The real question is, if we were happy to do chemoimmunotherapy neoadjuvant with chemotherapy/nivolumab, do we want or need to add the year of immunotherapy? It certainly adds some cost, it adds some risk for toxicity, and it adds a year of a patient coming into the clinic and getting IV infusions all this time to get a treatment that the patient has already had for four cycles in most of these trials.

If your cancer is resistant, is there going to be an incremental benefit to giving more of it? What are your thoughts about the risk and benefit? Going to a patient in your own clinic, how are you going to counsel your patients? Will anything change after the presentation of all these data and how you approach preoperatively?

Rotow: I agree. In some sense, it's an embarrassment of riches, right?

West: Yes.

Rotow: We have so many positive studies looking at perioperative immunotherapy for our patients. They all show improved outcomes, but of course, they all compare with the old control arm of chemotherapy alone in some form, and this is no longer a useful control in this space. The open question is, do you use neoadjuvant, do you use adjuvant, or do you use both?

My high-level takeaway from these data is that the neoadjuvant component appears to be important. I think the overall trend, comparing across studies, of course, is that outcomes seem to be better with the neoadjuvant component. You also get the advantage of potential downstaging and potential greater ease of surgical resection. We know they have lower morbidity resection and shorter surgeries. You can comment on that. You also get your pathologic response data.

West: You get the feedback.

Rotow: Exactly.

West: The deliverability is also a big issue. You know you can much more reliably deliver your intended treatment by doing neoadjuvant followed by surgery.

Rotow: Exactly.

West: We know there's major drop-off if patients have surgery, and in the recovery room they hear you got it all, and then they need to come back and maybe get chemotherapy and immunotherapy for a year. They'd ask, "What for? I can't see anything."