John Marshall, M.D.

The understanding of genetic mutations, like tumors that are microsatellite instability-high (MSI-H), and the therapies that go along with them is transforming the world of colorectal cancer, according to John Marshall, M.D.

Marshall - who is chief of the Division of Hematology/Oncology at MedStar Georgetown University Hospital, professor of medicine and oncology at the Lombardi Comprehensive Cancer Center at Georgetown University, and director of the Otto J. Ruesch Center for the Cure of Gastrointestinal Cancer — says that testing positive for MSI-H can have important treatment implications for the patient, and may signal to family members that they should be tested, too.

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Genetic Testing Is Important for Both Patients and Family Members

John Marshall, M.D., shares his thoughts about the differences between awareness months, in particular March, which is Colorectal Cancer Awareness month.

Marshall is chief of the Division of Hematology/Oncology at MedStar Georgetown University Hospital, professor of medicine and oncology at the Lombardi Comprehensive Cancer Center at Georgetown University, and director of the Otto J. Ruesch Center for the Cure of Gastrointestinal Cancer.

March differs from October — breast cancer awareness month – in that it has a different tone. Where October celebrates high survival rates among individuals with breast cancer, March tends to be more about remembering patients who passed, and advocating for screening on their behalf. "October is harvest time. But March is spring, and we have work to do going forward.”

Colorectal cancer expert John Marshall, M.D., shares his feelings about the month of March, which is Colorectal Cancer Awareness month.

Author | John Marshall, M.D.

Genetic Testing Is Important for Both Patients and Family Members

Colorectal Cancer Awareness Month: 'We Have Work to Do'