Colorectal Cancer

Tucatinib as monotherapy and in combination with trastuzumab supported further investigation of the regimens in patients with metastatic HER2-positive colorectal cancer.

At the 2022 ASCO Annual Meeting, Christine Parseghian, MD, reviewed results from a phase 2 trial assessing efficacy of panitumumab plus or minus trametinib in patients with RAS/BRAF wild-type colorectal cancer and compared EGFR rechallenge strategies with available agents in the third-line setting.

Results from the phase 2 ExIST trial indicated that the addition of galunisertib to neoadjuvant chemoradiotherapy for patients with locally advanced rectal cancer resulted in an improvement in responses.

Three months of neoadjuvant chemotherapy may downstage early-stage rectal cancer and thereby reduce the need for total mesorectal excisions (TMEs), resulting in higher rates of organ preservation.

Christine Parseghian, MD, discussed the effects of rechallenging patients with a prior response to EGFR inhibition with panitumumab plus or minus the MEK inhibitor trametinib in RAS/BRAF wildtype, microsatellite stable colorectal cancer.

Cornelis J. A. Punt, MD, PhD, spoke about bevacizumab plus either FOLFOXIRI or FOLFOX/FOLFIRI in patients with unresectable colorectal liver metastases and right-sided or RAS/BRAF-mutant tumors and how these regimens may be used for curative-intent therapy.

Expert oncologists look toward future utilization of circulating tumor DNA testing and consider how the field of oncology may evolve.

Shared insight on how circulating tumor DNA may be used in real-world clinical practice to improve the value of cancer care.

Data from the phase 2 DYNAMIC trial show that a circulating tumor DNA–guided approach to adjuvant therapy selection may be feasible for patients with stage II colorectal cancer, but Tanios S. Bekaii-Saab, MD, is skeptical about its readiness for prime time.

Moving on to the second patient scenario, panelists elucidate the value of ctDNA in patients with triple-negative breast cancer.

Investigators found that patients with non–gain-of-function TP53-mutant right-sided metastatic colorectal cancer and gain-of-function TP53-mutant left-sided tumors had poorer survival vs their counterparts.

Data from the PARADIGM trial that were presented at 2022 ASCO demonstrated that panitumumab plus FOLFOX should be standard of care for patients with left-sided, RAS wild-type colorectal cancer, according to Tanios S. Bekaii-Saab, MD.

Tanios S. Bekaii-Saab, MD, discussed how data from clinical trials examining different targeted strategies in colorectal cancer will transform the way in which patients with this malignancy are seen and treated.

At 2022 ASCO, Tanios S. Bekaii-Saab, MD, talks about how data from the ongoing MOUNTAINEER trial investigating trastuzumab plus tucatinib in HER2-positive metastatic colorectal cancer and other similar trials may impact the standard of care going forward.

In the context of clinical trial data and personal experience, experts weigh the value of circulating tumor DNA as a tool in cancer care.

Experts share their perspective on clinical trial data driving the use of circulating tumor DNA in various settings of cancer care.

Focusing on breast cancer, lung cancer, and GI cancers respectively, expert oncologists review the utility of circulating tumor DNA assays.

Expert panelists elucidate the mechanisms of ctDNA and MRD testing, providing a broad perspective on how they are used in cancer care.

Development on CYAD-101 as a treatment for patients with refractory/metastatic colorectal cancer continues after the FDA has lifted a clinical hold on the phase 1b CYAD-101-002 trial.

At 2022 ASCO, Tanios S. Bekaii-Saab, MD, reviews the MOUNTAINEER trial of trastuzumab plus tucatinib for HER2-positive metastatic colorectal cancer and foreshadows how an approved regimen may help improve outcomes in this patient population.

Cornelis J. A. Punt, MD, PhD, spoke about the phase 3 CAIRO5 trial of bevacizumab plus either FOLFOXIRI or FOLFOX/FOLFIRI for patients with initially unresectable colorectal liver metastases.

Serial postoperative ctDNA analysis could be a useful tool in guiding treatment decisions and improving care for patients with stage III colorectal cancer.

Shared insight on the potential roles of ctDNA and MRD testing in the monitoring and treatment of patients with colorectal cancer.

Centering discussion on a patient scenario of stage II colorectal cancer, expert oncologists consider how ctDNA may inform use of adjuvant chemotherapy in this setting.

Patients with mismatch repair deficient and/or microsatellite instability–high locally advanced colorectal cancer appear to derive promising benefit from treatment with neoadjuvant immune checkpoint inhibitors.