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Circulating tumor DNA

Circulating tumor DNA

Search complete. 400 mentions across 89 episodes found for "Circulating tumor DNA".

Sep 19, 2026

Matthew GalskyGUEST
20:49
They used the tumor-informed Signatera assay, and they applied this again retrospectively.
Matthew GalskyGUEST
20:54
And you can see on the slide, the disease-free survival and overall survival results of the study now stratified by whether or not there was detectable circulating tumor DNA in at that first visit after surgery when patients were registered on the study.
Matthew GalskyGUEST
21:10
And you can see that in patients with detectable ctDNA, there seems to be a benefit in terms of disease-free survival and overall survival now with adjuvant atezolizumab versus observation, whereas in patients with undetectable ctDNA, much more difficult to show that benefit.
Matthew GalskyGUEST
21:29
And so this really helps us feel confident that the lack of benefit in Invigor10 from a primary study endpoint standpoint was not because the hypothesis was flawed, but rather because the patients were not enriched with the highest likelihood for needing treatment based on the presence of micrometastatic disease.
Matthew GalskyGUEST
21:54
very interesting clinical validation of this concept in a retrospective cohort.
Matthew GalskyGUEST
22:09
So Invigor11 basically took that concept from Invigor10 and tested it prospectively.
Matthew GalskyGUEST
22:15
Patients who had undergone cystectomy for muscle invasive bladder cancer who had high-risk pathological features, the same features that I mentioned for that prior generation of adjuvant IO studies, were enrolled.
Matthew GalskyGUEST
22:28
However, after enrollment, patients had ctDNA testing.
Brian SlomovitzGUEST
15:47
There's always toxicity associated with some of these drugs.
Brian SlomovitzGUEST
15:49
So maybe we'll be able to learn more, stop the maintenance therapy earlier, maybe incorporate ctDNA into how long the maintenance should be.
Brian SlomovitzGUEST
15:58
But I think that's another finding in this study that we have to take a closer look on as far as duration of therapy.
Neil LoveHOST
16:04
That's really a great point.

33 MINS LATER

Gottfried E KonecnyGUEST
49:31
And none of the biomarkers really directed towards either TDXD or Mervituximab as a useful next line of therapy in platinum-resistant disease.
Gottfried E KonecnyGUEST
49:39
So she started and is tolerating treatment well.
Gottfried E KonecnyGUEST
49:44
And we have early signs of decreasing CA125 and ctDNA dropping.
Gottfried E KonecnyGUEST
49:50
So encouraging.
Brian M SlomovitzGUEST
15:47
There's always toxicity associated with some of these drugs.
Brian M SlomovitzGUEST
15:49
So maybe we'll be able to learn more, stop the maintenance therapy earlier, maybe incorporate ctDNA into how long the maintenance should be.
Brian M SlomovitzGUEST
15:58
But I think that's another finding in this study that we have to take a closer look on as far as duration of therapy.
Neil LoveHOST
16:04
That's really a great point.

33 MINS LATER

Gottfried E KonecnyGUEST
49:31
And none of the biomarkers really directed towards either TDXD or Mervituximab as a useful next line of therapy in platinum-resistant disease.
Gottfried E KonecnyGUEST
49:39
So she started and is tolerating treatment well.
Gottfried E KonecnyGUEST
49:44
And we have early signs of decreasing CA125 and ctDNA dropping.
Gottfried E KonecnyGUEST
49:50
So encouraging.
Brian M SlomovitzGUEST
15:47
There's always toxicity associated with some of these drugs.
Brian M SlomovitzGUEST
15:49
So maybe we'll be able to learn more, stop the maintenance therapy earlier, maybe incorporate ctDNA into how long the maintenance should be.
Brian M SlomovitzGUEST
15:57
But I think that's another finding in this study that we have to take a closer look on as far as duration of therapy.
Neil LoveHOST
16:04
That's really a great point.

33 MINS LATER

Gottfried E KonecnyGUEST
49:31
And none of the biomarkers really directed towards either TDXD or Mervituximab as a useful next line of therapy in platinum-resistant disease.
Gottfried E KonecnyGUEST
49:39
So she started and is tolerating treatment well.
Gottfried E KonecnyGUEST
49:44
And we have early signs of decreasing CA125 and ctDNA dropping.
Gottfried E KonecnyGUEST
49:50
So encouraging.
Krushangi PatelGUEST
30:29
And so she actually went through quite a bit more than a lot of patients do as far as getting chemotherapy afterwards.
Krushangi PatelGUEST
30:35
So we now use that ongoing, that CT DNA or circulating tumor DNA to look and see whether there is any signs of cells or circulating tumor genetic material that's in her now or moving forward.
Krushangi PatelGUEST
30:50
And we used it to determine when or how long she needed treatment afterwards as well.
Jay RutlandHOST
30:57
So January 24, she comes in your office.
Erica MayerGUEST
2:45
Patients who had been on their first-line aromatase inhibitor and CDK4-6 inhibitor for at least six months entered into screening.
Erica MayerGUEST
2:53
where they had ctDNA drawn to look for emergence of the ESR1 mutation.
Erica MayerGUEST
2:58
And this testing was done about every three months, corresponding to times of restaging.
Erica MayerGUEST
3:03
So we might think about four times a year they had ctDNA drawn.
Erica MayerGUEST
3:07
What was being looked for was the emergence of this mutation, but in the absence of clinical progression.
Erica MayerGUEST
3:13
So about 3,000 patients entered the screening step of the study and had this serial testing done.
Erica MayerGUEST
6:11
Additionally, there's some really provocative molecular data that's come out of Serena 6.
Erica MayerGUEST
6:15
For example, looking at the change in the variant allele fraction of the ESR1 mutation over time, showing that in the patients who switched to camazestrin, there was a dramatic drop in the ESR1 VAF level, compared to in the aromatase inhibitor arm, that level just climbs because you're seeing the disease progressing while they're not being treated for the ESR1 mutation.
Neil LoveHOST
2:14
Any questions for the faculty?
Nazli DizmanGUEST
2:16
If I am stopping all his anti-cancer therapies, can I utilize ctDNA to monitor his disease burden in the meanwhile? What are your top process when starting someone with type 2 diabetes on EnfortMap Vedotin? Whether you take into account if they are on insulin or not, or their A1c level to start EnfortMap Vedotin? For this gentleman with grade 3 pneumonitis, we didn't really think that re-challenge was possible, especially he required high-dose corticosteroid for a prolonged amount of time.
Nazli DizmanGUEST
2:57
But in general, how do you approach to pneumonitis in bladder cancer population? If you could talk about your general approach based on grading of the pneumonitis and the impact on whether to re-challenge for what specific scenarios?
Neil LoveHOST
3:14
Any comments on the case? And also, whether it's clear or maybe there's some other reason that the pneumonitis is from the PEMBRO, could it have been from the infortimab also?
Alexandra DrakakiGUEST
2:47
So when they come to us, You know, the question that always comes up and patients are asking us is, when did that happen? Could we have prevented this? Was it missed? And so it's still a question of the timing, especially since these patients only undergo cystoscopies and urine cytology.
Alexandra DrakakiGUEST
3:09
Maybe the ctDNA story will change that.
Alexandra DrakakiGUEST
3:12
Maybe if we start getting more and more testing, we'll catch those that are developing or are prone to develop oligometastatic or full-blown metastatic disease.
Alexandra DrakakiGUEST
3:23
But again, it's not uncommon, at least in a specific TU oncology clinic.

8 MINS LATER

Alexandra DrakakiGUEST
11:36
And we don't, we are not stopping treatment.
Alexandra DrakakiGUEST
11:38
The trial does not require to stop treatment.
Alexandra DrakakiGUEST
11:42
We follow the ctDNA since that came up.
Alexandra DrakakiGUEST
11:46
And, you know, it's a tough call to make, to stop if there is no toxicity.
Neil LoveHOST
2:14
Any questions for the faculty?
Nazli DizmanGUEST
2:16
If I am stopping all his anti-cancer therapies, can I utilize ctDNA to monitor his disease burden in the meanwhile? What are your top process when starting someone with type 2 diabetes on EnfortMap Vedotin? Whether you take into account if they are on insulin or not, or their A1c level to start EnfortMap Vedotin? For this gentleman with grade 3 pneumonitis, we didn't really think that re-challenge was possible, especially he required high-dose corticosteroid for a prolonged amount of time.
Nazli DizmanGUEST
2:57
But in general, how do you approach pneumonitis in bladder cancer population? If you could talk about your general approach based on grading of the pneumonitis and the impact on whether to re-challenge for what specific scenarios?
Neil LoveHOST
3:14
Any comments on the case? And also, whether it's clear, or maybe there's some other reason that the pneumonitis is from the PEMBRO, could it have been from the Enfortimab also?
Neil LoveHOST
2:14
Any questions for the faculty?
Nazli DizmanGUEST
2:17
If I am stopping all his anticancer therapies, can I utilize ctDNA to monitor his disease burden in the meanwhile? What are your top process when starting someone with type 2 diabetes on enfortumab vedotin, whether you take into account if they are on insulin or not, or their A1C level to start enfortumab vedotin? For this gentleman with grade three pneumonitis, we didn't really think that a re-challenge was possible, especially he required high-dose corticosteroid for a prolonged amount of time.
Nazli DizmanGUEST
2:57
But in general, how do you approach to pneumonitis in bladder cancer population? If you could talk about your general approach based on grading of the pneumonitis and the impact on whether to re-challenge for what specific scenarios.
Neil LoveHOST
3:14
Any comments on the case? And also, whether it's clear or maybe there's some other reason that the pneumonitis is from the pembro.

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