Ruesch Center Director
Georgetown University
Joined November 2014
- Tweets1.8K
- Following335
- Followers2K
- Likes3.5K
John Marshall retweeted
Please join us in congratulating Elizabeth Jaffee. M.D., FAACR, FACP, FAAAS, FAIO of @hopkinskimmel on being named a 2026 Luminary Award in GI Cancers recipient. This award honors individuals who have made transformative strides in the lives of patients with GI Cancers. Learn more: bit.ly/Luminary26.
John Marshall retweeted
We are thrilled to be joined by Julia Rowland, PhD, FAPOS, FASCO of @SmithCenterDC and @LombardiCancer to discuss "Finding and Utilizing Your Community Throughout the Cancer Care Continuum" at this year's Ruesch Center Symposium on Nov 21st. Register today using promo code Guest26: bit.ly/Ruesch26.
John Marshall retweeted
Please join us in congratulating @LynnMatrisian, Ph.D., MBA, FAACR, FAAAS of @PanCAN, on being named a 2026 Luminary Award in GI Cancers recipient. This award honors individuals who have made transformative strides in the lives of patients with GI Cancers. Learn more: bit.ly/Luminary26.
John Marshall retweeted
AI is beginning to influence not just how we analyze cancer data, but how treatment decisions could be personalized for individual patients.
In the latest Oncology Unscripted by Decera Clinical Insights, @marshalj23, explores emerging research using AI to inform treatment selection and examines new findings across precision medicine and colorectal cancer that challenge existing assumptions.
As the evidence evolves, which findings are ready to move from clinical evidence to action, and where is more research still needed?
Watch the full episode: bit.ly/4kcAhlI
#Oncology #ArtificialIntelligence #PrecisionMedicine #CancerCare #ColorectalCancer #ScientificActivation #EvidenceToAction #Decode
John Marshall retweeted
Oncology Unscripted by Decera Clinical Insights brings candid conversations on the ideas, innovations, and issues shaping cancer care today.
Join Dr @marshalj23 as he explores the latest developments across oncology, from AI and personalized treatment decisions to mRNA vaccines, cancer detection, research, and how to bring new scientific evidence into clinical action.
Catch up on recent episodes and explore the full series: Watch Oncology Unscripted bit.ly/4kcAhlI
#Oncology #CancerCare #CancerResearch #HealthcareInnovation #ScientificActivation #EvidenceToAction #Decode
John Marshall retweeted
Join us on November 20, 2026, for a dynamic discussion with Drs. Nilo Azad, Amrita Cheema, Daniel Shu and Arthur Winer. RAS Story: Biology, Translational Data and Therapeutics in GI Oncology. bit.ly/Ruesch26. Use promo code Guest26 to register today. @LombardiCancer @InovaSchar @hopkinskimmel @UMmedschool @OncLive
John Marshall retweeted
At tonight's State of the Science Summit, @marshalj23, @mnoel3232, @MPishvaian, and @JaydiDelRivero discussed first-line therapy in HER2-positive gastroesophageal cancers, treatment sequencing strategies in previously treated metastatic CRC, the evolving treatment landscape in pancreatic cancer, and optimizing treatment options for neuroendocrine tumors. @OncLive
John Marshall retweeted
Please join us in congratulating Al B. Benson III M.D., FACP, FACCC, FASCO, @LurieCancer, on being named a 2026 Luminary Award in GI Cancers recipient. This award honors individuals who have made transformative strides in the lives of patients with GI Cancers. Learn more: bit.ly/Luminary26.
John Marshall retweeted
The conversation around vaccines continues to evolve, with changing recommendations and growing public debate adding new complexity.
In this episode of Oncology Unscripted by Decera Clinical Insights, @marshalj23 reflects on vaccine hesitancy, changing vaccination policies, and the questions emerging as new vaccine technologies continue to advance.
Hear his perspective on these shifts and how they intersect with an important development in oncology: positive results for a personalized mRNA vaccine in melanoma.
▶️ Tune in to the full episode: bit.ly/4kcAhlI
#OncologyUnscripted #Oncology #Vaccines #Melanoma #mRNA
John Marshall retweeted
On Wednesday, October 7, at 6:00 pm EDT, join @marshalj23, @mnoel3232, @MPishvaian, and @JaydiDelRivero for an evening of discussion, guided questions, and real-time answers about what matters most in Gastrointestinal Cancers. Visit bit.ly/4z64SYf for complimentary registration.
John Marshall retweeted
Thank you @nytimes for covering @CCAlliance and the fact that #colorectalcancer is killing way too many young people. It is now the #1 cause of cancer related deaths in the Us for people under 50. We need new treatments now. #ProjectCureCRC
Targeted therapies are transforming cancer care, yet many patients never receive the biomarker testing that could reveal more effective, potentially less toxic treatment options.
That urgency is driving KLEOS, the Alliance’s adaptive clinical trial platform. By evaluating multiple promising colorectal cancer therapies more efficiently and expanding access to cutting-edge options, KLEOS aims to move breakthroughs from the lab to patients faster—because innovation only matters when patients can benefit from it.
Read this article from @nytimes to learn why too many patients are missing out on groundbreaking treatments and what needs to change: bit.ly/NYT-NewCancerDrugs
John Marshall retweeted
Making healthy food choices sounds simple. Our modern food environment makes it anything but.
In this episode of Oncology Unscripted by Decera Clinical Insights, @marshalj23 speaks with evolutionary biologist Daniel E. Lieberman, PhD, about how the way we eat has changed—and what that could mean for our health.
From ultra-processed foods and fiber to GLP-1s and the need for better nutrition information, their conversation explores the larger systems influencing our everyday choices and the potential implications for cancer prevention.
▶️ Tune in to the full conversation: bit.ly/4kcAhlI
#OncologyUnscripted #CancerPrevention #Nutrition #Oncology #PublicHealth
John Marshall retweeted
Register today for the 17th Annual Ruesch Center Symposium and join us on November 20, 2026, as we bring colleagues from @LombardiCancer, @InovaSchar, @UMmedschool, and @hopkinskimmel together for discussion, networking, and debate on critical issues related to GI Cancers. bit.ly/Ruesch26.
John Marshall retweeted
This year's Thomas R. Schafer Memorial Lecture at the #RueschSymposium features Louis Weiner, MD, Director of @LombardiCancer, on November 20, 2026. Learn more and register today. bit.ly/Ruesch26.
@LombardiCancer @MedStarGUH
John Marshall retweeted
Colorectal cancer is now the deadliest cancer for people under 50. The rate at which people under 65 are diagnosed with the disease rises nearly 3% every year. The worrying trend has fueled a sense of urgency for John Marshall, MD, who has devoted his career to developing new precision treatments to better understand one of the fastest-growing cancers in the U.S.
Today, Marshall leads KLEOS, a new collaboration of researchers, patient advocacy groups, and pharmaceutical companies to accelerate the pace of research to find new treatments for colorectal cancer.
“Given the rate at which it’s growing and the clear lack of understanding as to why, there’s no stronger signal that something is going on in our environment, in our world, than young-onset colon cancer,” @marshalj23 said.
georgetown.edu/news/colon-ca…
@LombardiCancer @MedStarGUH @CCAlliance
John Marshall retweeted
Join us for the 17th Annual Ruesch Center Symposium on Nov. 20- 21! Session Topic: Novel Approaches for Treating GI Cancers. @LombardiCancer @MedStarGUH @JohnsHopkinsSPH @InovaHealth @OncLive #GIcancer. Register today: bit.ly/Ruesch26
John Marshall retweeted
GLP-1 receptor agonist use has risen dramatically, but what happens when patients stop taking them, and what could widespread, long-term use mean for health outcomes?
In Oncology Unscripted by Decera Clinical Insights @marshalj23, reflects on the rapid rise of GLP-1s, what current patterns of use may tell us about their long-term impact, and the questions he hears from patients about potential implications for cancer outcomes.
▶️ Tune in to the full episode: bit.ly/4kcAhlI
#GLP1 #Oncology #CancerCare #MedBuzz #Healthcare
John Marshall retweeted
“Go exercise” may sound like simple advice, but helping patients become more physically active is far more complex.
In this episode of Oncology Unscripted by Decera Clinical Insights, @marshalj23, sits down with evolutionary biologist Daniel E. Lieberman, PhD, to explore why physical activity can be so difficult to sustain and why understanding each patient’s individual barriers matters.
Their conversation goes beyond exercise to examine the connections among physical activity, nutrition, the microbiome, and cancer prevention.
▶️ Tune in to the full conversation: bit.ly/4kcAhlI
#OncologyUnscripted #CancerPrevention #PhysicalActivity #Nutrition #Oncology #ScientificActivation #EvidenceToAction #Decode
John Marshall retweeted
“We chose the title “Luminary” for good reason — these are individuals who were inspired to shine light into the darkness so that others could see the way forward,” said @marshalj23, director of the @RueschCenter @LombardiCancer. Learn more about the 2026 Luminary Awards at bit.ly/Luminary2026.
John Marshall retweeted
“Finally, we’ve hit the target that we’ve been trying to hit for many, many years,” @benweinbergmd said. “That is really what is driving the tumor growth.” @thehoya @LombardiCancer.
thehoya.com/science/gu-profe…