Meaningful End Points for Patients with Metastatic Melanoma
Source: Onc Live, May 2023
Sunandana Chandra, MD, MS: We’ve talked a lot about different trials that led to the FDA approval of some of these agents. What are some of the more meaningful end points? Overall survival is a gold standard, but in many of our trials we don’t have that data yet or we’re not [statistically] powered to be able to show that as a primary end point. Can you comment on some meaningful end points for this metastatic patient population? Dr Pavlick?
Anna C. Pavlick, DO: That’s a very intriguing question. Many times patients will have responses; however, they won’t be complete responses [CRs]. You’ll still have radiographic evidence of what we don’t know is real disease or not real disease, so you have to look at those patients who have stable disease and can go on to have stable disease for very long periods of time. Ultimately, overall survival is the bottom line, but progression-free survival is also a very important factor. You can have complete responders and feel much more comfortable knowing that someone who has complete resolution of disease on their imaging is doing well, but if you can follow someone with sequential scans over the years and their disease never changes, that’s very meaningful.
Nikhil Khushalani, MD: I agree. The other end point that is very meaningful for the metastatic patients is complete response rate because I do believe, at least with immunotherapy, that CR rates in this disease eventually equate or serve as a surrogate for long-term disease control. If we have regimens that have a higher complete response rate, those are regimens that I’d try to favor using up front. That’s one approach.