Stacey A. Cohen, MD

The panel shares some closing thoughts on ctDNA testing in patients with colorectal cancer.

The panel comments on how they see ctDNA assay usage evolving in colorectal cancer management.

Stacey A. Cohen, MD, and Aparna Parikh, MD, MS, review the design and outcomes of key clinical trials exploring the use of ctDNA assays in colorectal cancer.

The panel reviews the different settings in colorectal cancer where ctDNA is being investigated as a tool for treatment and monitoring.

Dr Daniel H. Ahn explains the logistical concerns of ctDNA testing in colorectal cancer.

Aparna Parikh, MD, MS, defines circulating tumor DNA (ctDNA) and the use of ctDNA assays in colorectal cancer.

The panel discusses other emerging biomarkers for monitoring patient response to therapy for colorectal cancer.

Dr Aparna Parikh explains minimal residual disease (MRD) in colorectal cancer and the logistical challenges of MRD testing.

Dr Stacey A. Cohen discusses how she typically monitors patients with stage II and III colorectal cancer during and after adjuvant therapy.

Stacey A. Cohen, MD, and Daniel H. Ahn, DO, describe the challenges of deciding which patients with colorectal cancer should receive adjuvant therapy, and the risk of over- and under-treatment in later stages.

Aparna Parikh, MD, MS, details when she would recommend adjuvant chemotherapy to patients with similar presentations of colorectal cancer.

Tanios S. Bekaii-Saab, MD, presents a patient scenario of a 64-year-old man with stage 2 (pT3N0) colon cancer to the panel for discussion.

Based on findings from a real-world retrospective analysis, Stacey A. Cohen, MD, discussed the prognostic value of post-surgical minimal residual disease detection in patients with stage I to III colorectal cancer.

Drs. Cohen and Lewis close by outlining ongoing clinical trials in CRC and hopes for the future of care.

Stacy A. Cohen, MD and Mark Lewis, MD share key takeaways from the GALAXY study and discuss the clinical implications of using ctDNA-based assays for patients with CRC.

Experts describe cumulative ctDNA clearance rates in patients with stage I-IV disease who did or did not receive adjuvant chemotherapy in the GALAXY study.

Stacy A. Cohen, MD, and Mark Lewis, MD, discuss how DFS correlates with stage and adjuvant chemotherapy receipt in patients who are ctDNA-positive.

GI oncologists discuss DFS data from the dynamics analysis cohort of the GALAXY study.

Mark Lewis, MD, provides a historical perspective of circulating tumor DNA and discusses previous trials on ctDNA analysis in patients with CRC.

Stacy A. Cohen, MD, and Mark Lewis, MD, comment on disease-free survival rates by ctDNA status in patients enrolled in the GALAXY study.

Drs Cohen and Lewis review the GALAXY enrollment strategy and describe the various colorectal cancer patient cohorts in the study.

Stacey A. Cohen, MD, and Mark Lewis, MD, introduce the 2022 ASCO GI abstract, “Association of Circulating Tumor DNA Dynamics With Clinical Outcomes in the Adjuvant Setting for Patients With Colorectal Cancer From an Observational GALAXY Study in CIRCULATE-Japan.”