“Heavily pretreated metastatic colorectal cancer (mCRC) poses significant therapeutic challenges.”
Colorectal cancer is one of the most common—and deadliest—cancers worldwide. Once it spreads and reaches the metastatic stage, treatment becomes far more difficult. Tumors can also behave very differently from one patient to another, especially after multiple rounds of therapy. Precision oncology is helping to overcome these challenges by enabling clinicians to analyze each tumor’s unique genetic profile and tailor treatment accordingly.
This approach was recently highlighted in a case study published in Volume 16 of Oncotarget. The report detailed how a 62-year-old man with advanced colorectal cancer received a highly personalized treatment plan, developed by an international panel of experts, after completing all standard treatment options.
The Case: Personalized Cancer Care in Action
Titled “Case Report WIN-MTB-2023001: WIN International Molecular Tumor Board – A 62-year-old male with metastatic colorectal cancer with 5 prior lines of treatment,” the paper illustrates how precision medicine can be applied in real-world cancer care. The paper was led by Alberto Hernando-Calvo from Vall d’Hebron University Hospital and Vall d’Hebron Institute of Oncology; Razelle Kurzrock from WIN Consortium and Medical College of Wisconsin; Oncotarget Editor-in-Chief Wafik S. El-Deiry from WIN Consortium and Legorreta Cancer Center at Brown University; and corresponding author Shai Magidi, also from WIN Consortium.
The patient had already undergone five different treatment regimens, including chemotherapy and targeted therapies. While some approaches initially showed results, the cancer repeatedly returned. With standard options exhausted, his case was submitted to the WIN International Molecular Tumor Board (MTB)—a global network of cancer experts representing 13 countries.
Comprehensive tumor genetic profiling revealed mutations in key genes such as BRAF, MET, APC, TP53, and NRAS. These alterations are known to promote tumor growth, contribute to treatment resistance, and predict a poor prognosis. Based on these findings, the MTB proposed a series of personalized treatment strategies, using off-label drug combinations designed to target the tumor’s specific genetic vulnerabilities.
Results: A Multi-Drug Treatment Approach
The team proposed several personalized treatment options. One strategy combined amivantamab (a dual-action antibody against MET and EGFR), trametinib (a MEK inhibitor), and regorafenib (a multi-target drug with effects on VEGF and WNT pathways). These combinations were not standard but were based on previous responses and the patient’s mutational profile. The plan was to start with reduced doses to avoid side effects, a method supported by earlier studies. Though access to some drugs was uncertain outside the United States, the goal was to attack the tumor from multiple angles based on its unique weaknesses.
The Breakthrough: Rethinking Cancer Therapy with Precision Oncology
This case highlights a key innovation in cancer treatment—not a new drug, but a new way of thinking. Instead of relying on a one-size-fits-all approach, clinicians matched the therapy to the patient’s tumor genetic characteristics. Importantly, these decisions were developed collaboratively and in real time by an international panel of experts.
The Impact: Expanding Options for Patients with Advanced Tumors
If applied more broadly, this personalized strategy could improve outcomes for patients with hard-to-treat cancers. Especially for those who have failed standard treatments, precision oncology can offer a way forward when no other effective options remain. It is a shift from treating cancer generally to treating the individual behind the diagnosis.
Future Perspectives and Conclusion
Although the patient in this case ultimately passed away, his case shows how much progress has been made in precision medicine. With detailed genetic testing and input from experts around the world, it is now possible to create treatment plans that would have been unthinkable just a few years ago. This case highlights the urgent need for wider access to advanced testing and new treatments, especially in countries where some drugs may not be available. Precision medicine is no longer just an idea for the future; it has become a present-day necessity in complex cancer care.
Click here to read the full Precision Oncology in Oncotarget.
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Oncotarget is an open-access, peer-reviewed journal that has published primarily oncology-focused research papers since 2010. These papers are available to readers (at no cost and free of subscription barriers) in a continuous publishing format at Oncotarget.com.
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