Opinion|Videos|November 14, 2023

The Role of Biomarker and Molecular Testing in CRC

Author(s)Tanios S. Bekaii-Saab, MD, FACP, Daniel H. Ahn, DO, Christina S. Wu, MB, BCh, MD

Drs Wu, Ciombor, and Cohen discussed upfront molecular testing in patients with colorectal cancer to guide treatment, with Dr Ciombor reviewing HER2 testing methods and Dr Cohen noting liquid biopsy limitations.

Episodes in this series

Expert panel smiling at camera.

EP. 1 Overview of Colorectal Cancer (CRC)

Expert panel smiling at camera.

EP. 2 Current Treatment Options for CRC

Expert panel smiling at camera.

EP. 3 The Role of Biomarker and Molecular Testing in CRC

Expert panel smiling at camera.

EP. 4 The Role of HER2 in CRC

New treatment updates could help find more patient subtypes to target and treat in the world of CRC.

EP. 5 Multidisciplinary Care and New Treatment Options in CRC

EP. 6 Case Presentation: A 50-Year-Old Man With Metastatic CRC (mCRC)

EP. 6 Case Presentation: A 50-Year-Old Man With Metastatic CRC (mCRC)

EP. 7 Tucatinib in Patients With CRC: Data From MOUNTAINEER-01

EP. 7 Tucatinib in Patients With CRC: Data From MOUNTAINEER-01

EP. 8 Strategies for Adverse Event Management in Patients With CRC Receiving Tucatinib

EP. 8 Strategies for Adverse Event Management in Patients With CRC Receiving Tucatinib

EP. 9 MOUNAINEER-03: Tucatinib in Combination with Trastuzumab and Chemotherapy in Patients With HER2+ CRC

EP. 9 MOUNAINEER-03: Tucatinib in Combination with Trastuzumab and Chemotherapy in Patients With HER2+ CRC

EP. 10 Case Presentation: A 64-Year-Old Woman With HER2+ mCRC

EP. 10 Case Presentation: A 64-Year-Old Woman With HER2+ mCRC

EP. 11 Trastuzumab Deruxtecan in Patients with HER2+ mCRC: The DESTINY-CRC01 Trial

EP. 11 Trastuzumab Deruxtecan in Patients with HER2+ mCRC: The DESTINY-CRC01 Trial

EP. 12 Managing Interstitial Lung Disease in Patients With HER2+ mCRC Receiving Trastuzumab Deruxtecan

EP. 12 Managing Interstitial Lung Disease in Patients With HER2+ mCRC Receiving Trastuzumab Deruxtecan

EP. 13 Clinician Insights on the Treatment of Patients With CRC

EP. 13 Clinician Insights on the Treatment of Patients With CRC

EP. 14 Future Perspectives and Unmet Needs in HER2+ mCRC Treatment

EP. 14 Future Perspectives and Unmet Needs in HER2+ mCRC Treatment

EP. 15 Key Takeaways for Community Oncologists Treating Patients With HER2+ mCRC

EP. 15 Key Takeaways for Community Oncologists Treating Patients With HER2+ mCRC

EP. 16 A Variety of Treatment Options Are Becoming Available in CRC

EP. 16 A Variety of Treatment Options Are Becoming Available in CRC

Newsletter

Stay up to date on recent advances in the multidisciplinary approach to cancer.

Related Content

FDA Accepts Priority Review for Dostarlimab in dMMR/MSI-H Rectal Cancer: © Sebastian Kaulitzki - stock.adobe.com

FDA Grants Priority Review to Dostarlimab in dMMR/MSI-H Rectal Cancer

ByCancer Network Staff

August 24th 2026

Baseline Tumor Cell Density May Predict Treatment Effect in Rectal Cancer: © Sebastian Kaulitzki - stock.adobe.com

Stratifying By Baseline Tumor Cell Density Indicates Treatment Effect Heterogeneity in Rectal Cancer

August 13th 2026

Baseline Plasma DKK1 Predicts Deepening Sirexatamab Benefit: © vladim_ka - stock.adobe.com

Sirexatamab Regimen May Improve PFS, OS in DKK1-High Colorectal Cancer

ByCancer Network Staff

August 12th 2026

Atezolizumab Combination Regimen Improves PFS in dMMR/MSI-H mCRC: © 程加星 - stock.adobe.com

Atezolizumab Plus Chemotherapy Improves PFS in dMMR/MSI-H Metastatic CRC

ByCancer Network Staff

July 30th 2026

Approval of the SimpleScreen CRC test may increase earlier detection of colorectal cancer and improve patient outcomes.

FDA Approves Blood-Based Test for Colorectal Cancer Screening

July 27th 2026

Latest CME

Optimizing Treatment for Biliary Tract Cancers

Optimizing Treatment for Biliary Tract Cancers

Ghassan Abou-Alfa, MD, MBA; Laura Williams Goff, MD, MSCI, MMHC, FASCO; Arndt Vogel, MD, PhD

Cross-Disease Integration of Immunotherapy Innovations

Cross-Disease Integration of Immunotherapy Innovations

Ghassan Abou-Alfa, MD, MBA; Laura Williams Goff, MD, MSCI, MMHC, FASCO; Arndt Vogel, MD, PhD

Expert Roundtable and Panel Discussions: Current and Future Landscape of TNBC

Expert Roundtable and Panel Discussions: Current and Future Landscape of TNBC

Aditya Bardia, MD, MPH, FASCO; Erika P. Hamilton, MD; Tiffany A. Traina, MD, FASCO

Show Me the Data®: New and Emerging Roles for Oral SERD Therapy in the Treatment of ER+/HER2– Breast Cancer

Show Me the Data®: New and Emerging Roles for Oral SERD Therapy in the Treatment of ER+/HER2– Breast Cancer

Ana C. Garrido-Castro, MD; Pedram Razavi, MD, PhD

PER Resource Center: Integrating Novel Approaches in TNBC – New Avenues for TROP2-Targeting ADCs and Beyond – Nursing

PER Resource Center: Integrating Novel Approaches in TNBC – New Avenues for TROP2-Targeting ADCs and Beyond – Nursing

Aditya Bardia, MD, MPH, FASCO; Erika P. Hamilton, MD; Virginia Kaklamani, MD, DSc; Filipa Lynce, MD; Rita Nanda, MD; Tiffany A. Traina, MD, FASCO

25th Annual International Congress on the Future of Breast Cancer® East

25th Annual International Congress on the Future of Breast Cancer® East

Joyce O’Shaughnessy, MD

25th Annual International Congress on the Future of Breast Cancer® West

25th Annual International Congress on the Future of Breast Cancer® West

Sara A. Hurvitz, MD, FACP; Joyce O’Shaughnessy, MD

Community Oncology Connections™: Monotherapies vs Combinations – Navigating Oral SERDs and Targeted Combination Strategies in HR+/HER2- Metastatic Breast Cancer | Wisconsin Association of Hematology and Oncology

Community Oncology Connections™: Monotherapies vs Combinations – Navigating Oral SERDs and Targeted Combination Strategies in HR+/HER2- Metastatic Breast Cancer | Wisconsin Association of Hematology and Oncology

Kurt C. Demel, MD, MBA; Sara A. Hurvitz, MD, FACP

Community Oncology Connections™: Monotherapies vs Combinations – Navigating Oral SERDs and Targeted Combination Strategies in HR+/HER2- Metastatic Breast Cancer | Arkansas Association of Cancer Professionals

Community Oncology Connections™: Monotherapies vs Combinations – Navigating Oral SERDs and Targeted Combination Strategies in HR+/HER2- Metastatic Breast Cancer | Arkansas Association of Cancer Professionals

Kamel Abou Hussein, MD; Yelda Nouri, MD

Community Oncology Connections™: Monotherapies vs Combinations – Navigating Oral SERDs and Targeted Combination Strategies in HR+/HER2- Metastatic Breast Cancer | Rhode Island Oncology Society

Community Oncology Connections™: Monotherapies vs Combinations – Navigating Oral SERDs and Targeted Combination Strategies in HR+/HER2- Metastatic Breast Cancer | Rhode Island Oncology Society

Aditya Bardia, MD, MPH, FASCO; Benjamin Scheier, MD

Ready for Radioligand Therapy? Patient Selection and Sequencing Simplified

Ready for Radioligand Therapy? Patient Selection and Sequencing Simplified

Jeremie Calais, MD, PhD; Tanya B. Dorff, MD; Scott T. Tagawa, MD, MS, FACP, FASCO

Radioligand Therapy 101: The Science Behind the Strategy

Radioligand Therapy 101: The Science Behind the Strategy

Jeremie Calais, MD, PhD; Tanya B. Dorff, MD; Scott T. Tagawa, MD, MS, FACP, FASCO

Medical Crossfire®: ADCs and Bispecifics in Lung Cancer – Hype, Hope, or a New Standard of Care?

In-Person + Virtual Event

Medical Crossfire®: ADCs and Bispecifics in Lung Cancer – Hype, Hope, or a New Standard of Care?

September 12, 2026

Arkansas Association of Cancer Professionals

Arkansas Association of Cancer Professionals

1 Session is Available!

Community Oncology Connections™: Monotherapies vs Combinations – Navigating Oral SERDs and Targeted Combination Strategies in HR+/HER2- Metastatic Breast Cancer | Iowa Oncology Society

Community Oncology Connections™: Monotherapies vs Combinations – Navigating Oral SERDs and Targeted Combination Strategies in HR+/HER2- Metastatic Breast Cancer | Iowa Oncology Society

Aditya Bardia, MD, MPH, FASCO; Priya Kumar, MBBS, MS

Community Oncology Connections™: Monotherapies vs Combinations – Navigating Oral SERDs and Targeted Combination Strategies in HR+/HER2- Metastatic Breast Cancer | Empire State Hematology & Oncology Society

Community Oncology Connections™: Monotherapies vs Combinations – Navigating Oral SERDs and Targeted Combination Strategies in HR+/HER2- Metastatic Breast Cancer | Empire State Hematology & Oncology Society

Aditya Bardia, MD, MPH, FASCO; Mohammad F. Ali, MD

𝘔𝘌𝘛 Alterations in NSCLC: Applying Diagnostic Advances and Targeted Therapies in a New Era of Treatment

𝘔𝘌𝘛 Alterations in NSCLC: Applying Diagnostic Advances and Targeted Therapies in a New Era of Treatment

Jonathan Goldman, MD; Sanja Dacic, MD, PhD; Deborah Doroshow, MD, PhD; Anne S. Tsao, MD, MBA

Community Oncology Connections™: Monotherapies vs Combinations – Navigating Oral SERDs and Targeted Combination Strategies in HR+/HER2- Metastatic Breast Cancer | South Carolina Oncology Society

Community Oncology Connections™: Monotherapies vs Combinations – Navigating Oral SERDs and Targeted Combination Strategies in HR+/HER2- Metastatic Breast Cancer | South Carolina Oncology Society

Kamel Abou Hussein, MD; Kate Baxstrom, MD

Community Oncology Connections™: How Can We Optimize the Use of Oral SERDs in the Community Oncology Setting? Best Practices for HR+/HER2– Breast Cancer | Texas Society of Clinical Oncology

Community Oncology Connections™: How Can We Optimize the Use of Oral SERDs in the Community Oncology Setting? Best Practices for HR+/HER2– Breast Cancer | Texas Society of Clinical Oncology

Ajit K. Bisen, MD, MBA; Virginia Kaklamani, MD, DSc

Community Oncology Connections™: Advancing Precision Testing and HER2-Targeted Care for Gastroesophageal Adenocarcinoma – Minnesota

Community Oncology Connections™: Advancing Precision Testing and HER2-Targeted Care for Gastroesophageal Adenocarcinoma – Minnesota

Geoffrey Ku, MD; Jack W. Erter III, MD, MMHC

Community Oncology Connections™: Advancing Precision Testing and HER2-Targeted Care for Gastroesophageal Adenocarcinoma – North Carolina

Community Oncology Connections™: Advancing Precision Testing and HER2-Targeted Care for Gastroesophageal Adenocarcinoma – North Carolina

Syma Iqbal, MD; Benjamin Scheier, MD

Community Oncology Connections™: Advancing Precision Testing and HER2-Targeted Care for Gastroesophageal Adenocarcinoma – West Virginia

Community Oncology Connections™: Advancing Precision Testing and HER2-Targeted Care for Gastroesophageal Adenocarcinoma – West Virginia

Sunnie S. Kim, MD; Kellie D. Spector, MD

Community Oncology Connections™: Bridging Academic and Community Connections to Advance Precision and Targeted Care in NF1 Plexiform Neurofibromas | Nevada Oncology Society

Community Oncology Connections™: Bridging Academic and Community Connections to Advance Precision and Targeted Care in NF1 Plexiform Neurofibromas | Nevada Oncology Society

Amy E. Armstrong, MD; Phioanh “Leia” Nghiemphu, MD

Kansas Society of Clinical Oncology

Kansas Society of Clinical Oncology

1 Session is Available!

Satellite Symposia at the Annual Radiation Oncology Meeting

In-Person + Virtual Event

Satellite Symposia at the Annual Radiation Oncology Meeting

September 27-28, 2026

27th Annual International Lung Cancer Congress®

27th Annual International Lung Cancer Congress®

Roy S. Herbst, MD, PhD; Sandip Patel, MD, FASCO; Heather A. Wakelee, MD, FASCO

Texas Society of Clinical Oncology

Texas Society of Clinical Oncology

1 Session is Available!

North Carolina Oncology Association

North Carolina Oncology Association

2 Sessions are Available!

Louisiana Oncology Society

Louisiana Oncology Society

2 Sessions are Available!

Tennessee Oncology Practice Society

Tennessee Oncology Practice Society

2 Sessions are Available!

Navigating Advances in Neovascular Retinal Disease: Translating Evidence to Practice in AMD, DME, and RVO

Navigating Advances in Neovascular Retinal Disease: Translating Evidence to Practice in AMD, DME, and RVO

SriniVas R. Sadda, MD, FARVO; Mark R. Barakat, MD, FASRS; David A. Eichenbaum, MD, FASRS

Washington State Medical Oncology Society

Washington State Medical Oncology Society

2 Sessions are Available!

Community Practice Connections™: DLL3-Targeting Bispecific Antibodies for Small Cell Lung Cancer—From Innovation to Practice

Community Practice Connections™: DLL3-Targeting Bispecific Antibodies for Small Cell Lung Cancer—From Innovation to Practice

Jacob Sands, MD; Anne Chiang, MD, PhD

Biomarker Testing in HER2+ GEA: Diagnosis and Treatment Implications

Biomarker Testing in HER2+ GEA: Diagnosis and Treatment Implications

Rahul Gosain, MD, MBA; Rohit Gosain, MD; Rutika Mehta, MD, MPH

Hot Seat: Converging Lines in the Management of RAS-Altered Cancers

Hot Seat: Converging Lines in the Management of RAS-Altered Cancers

Shubham Pant, MD, MBBS; Alison Schram, MD; Helena Yu, MD

Diagnosis and Management of TGCT

Diagnosis and Management of TGCT

Mark Agulnik, MD; Lee M. Zuckerman, MD

Optimizing Multidisciplinary Care in TGCT

Optimizing Multidisciplinary Care in TGCT

Mark Agulnik, MD; Lee M. Zuckerman, MD

Cases & Conversations™: Unmasking Epithelioid Sarcoma – Enhancing Early Diagnosis and Multidisciplinary Care

Cases & Conversations™: Unmasking Epithelioid Sarcoma – Enhancing Early Diagnosis and Multidisciplinary Care

Mark Agulnik, MD; Mrinal M. Gounder, MD; Sandra D’Angelo, MD; Sujana Movva, MD

Medical Crossfire®: The Who, When, and How of TROP2-Targeting ADCs, ICIs, and PARP inhibition in Triple-Negative Breast Cancer

Medical Crossfire®: The Who, When, and How of TROP2-Targeting ADCs, ICIs, and PARP inhibition in Triple-Negative Breast Cancer

Hope S. Rugo, MD; Alison K. Conlin, MD; Marleen Kok, MD, PhD; Heather McArthur, MD, MPH

Beyond Primary End Points: Digging Into Randomized and Real-World Data to Guide Challenging Treatment Decisions in HR+/HER2− Metastatic Breast Cancer

Beyond Primary End Points: Digging Into Randomized and Real-World Data to Guide Challenging Treatment Decisions in HR+/HER2− Metastatic Breast Cancer

Seth A. Wander, MD, PhD; Marla D. Lipsyc-Sharf, MD

Show Me the Data™: Personalizing First-Line and Maintenance Therapy in HER2+ Metastatic Breast Cancer to Extend Survival and Elevate Quality of Life

Show Me the Data™: Personalizing First-Line and Maintenance Therapy in HER2+ Metastatic Breast Cancer to Extend Survival and Elevate Quality of Life

Sara A. Hurvitz, MD, FACP; Rena Callahan, MD; Michelle Melisko, MD; Paolo Tarantino, MD, PhD

From Frontline to Heavily Pretreated HR+/HER2- Metastatic Breast Cancer: Expert Perspectives on Optimizing the Expanding Treatment Armamentarium

From Frontline to Heavily Pretreated HR+/HER2- Metastatic Breast Cancer: Expert Perspectives on Optimizing the Expanding Treatment Armamentarium

Erika P. Hamilton, MD; Giuseppe Curigliano, MD, PhD; VK Gadi, MD, PhD; Jason Aboudi Mouabbi, MD

Real-World Insights on Advances in the Management of Myeloproliferative Neoplasms: How the Experts Apply the Latest Developments to Clinical Practice

Real-World Insights on Advances in the Management of Myeloproliferative Neoplasms: How the Experts Apply the Latest Developments to Clinical Practice

Naveen Pemmaraju, MD; Shannon Elf, PhD; Angela Fleischman, MD, PhD; Bethan Psaila, MD

SimulatEd™: A Roadmap to Personalized Care Plans and Shared Decision-Making in Low-Grade Serous Ovarian Cancer

Case-based Simulation

SimulatEd™: A Roadmap to Personalized Care Plans and Shared Decision-Making in Low-Grade Serous Ovarian Cancer

Rachel N. Grisham, MD

Expert Illustrations & Commentaries: Translating the Science of Bispecific Antibodies in Solid Tumors – From Mechanisms to Emerging Data

Expert Illustrations & Commentaries: Translating the Science of Bispecific Antibodies in Solid Tumors – From Mechanisms to Emerging Data

John V. Heymach, MD, PhD; Anne S. Tsao, MD, MBA, FASCO, FACHE

Tumor Board™: Navigating a New Era of Innovation and Expanding Options in NMIBC

Tumor Board™: Navigating a New Era of Innovation and Expanding Options in NMIBC

Archan Khandekar, MD; Wassim Kassouf, MD, CM, FRCSC; Jen-Jane Liu, MD

“D” is for Diagnosis: Decoding a Difficult Thoracic Malignancy—Piecing Together a Rare Diagnosis, Preparing for Tomorrow’s Treatments

“D” is for Diagnosis: Decoding a Difficult Thoracic Malignancy—Piecing Together a Rare Diagnosis, Preparing for Tomorrow’s Treatments

Aakash Desai, MD, MPH; Ibiayi Dagogo-Jack, MD, FASCO; Patrick Forde, MD, PhD

Trending on CancerNetwork

FDA Approves Zanidatamab-Based Regimens for First-Line HER2+ Gastric Cancers

FDA Grants Priority Review to Dostarlimab in dMMR/MSI-H Rectal Cancer

Lenvatinib Combo Holds Ground Against HER2 ADCs in Endometrial Cancer

Teclistamab Combo Earns EU Approval in Relapsed/Refractory Multiple Myeloma

Novel Fluorescence Imaging Agent May Improve Lung Cancer Surgery