Gastrointestinal Program

The Gastrointestinal Program in the Department of Radiation Oncology treats all types of GI cancers, including difficult-to-treat, advanced-stage pancreatic cancer and liver cancer, using the latest radiation therapies.


Our radiation oncologists use the most advanced therapies to treat GI cancers, many of which are available at few other hospitals.

Each year, we treat hundreds of patients with cancers and tumors of the:

  • Colon
  • Rectum
  • Liver
  • Pancreas
  • Stomach
  • Gall bladder
  • Small intestine
  • Bile ducts
  • Esophagus
  • Anus

Leading-Edge Radiation Therapy

Founded in 1976 by Leonard Gunderson, MD, one of the country's first specialists in GI radiation oncology, our program is one of the longest running and most progressive in the United States.

Our facilities include innovations such as proton beam therapy, 4D CT scanning and the region's only operating room dedicated to intraoperative radiation therapy (IORT). The cornerstone of our program, however, is our team of radiation oncologists. Drawing on their experience with today's advanced techniques and technologies, they design effective treatments tailored to the needs of each patient.

Personalized & Comprehensive Care

In the highly specialized Tucker Gosnell Center for Gastrointestinal Cancers, we work side-by-side with your entire cancer treatment team, which may include medical oncologists, surgical oncologists, radiologists and pathologists. (For patients with liver cancer or bile-duct cancer, our physicians collaborate with the world-class staff at the hospital's Hepatobiliary Cancer Clinic.) Our cross-specialty approach enables us to provide comprehensive care tailored to your needs.

Meet the Team

Program chief Theodore Hong, MD, an expert in the full spectrum of radiation therapies, treats hundreds of patients each year. Working with our physicists, dosimetrists and technologists, he plans and administers therapy for all types of GI cancers, including difficult-to-treat, advanced-stage pancreatic cancer and liver cancer.

A groundbreaking researcher, Dr. Hong leads numerous clinical trials, many focused on improving the effectiveness of radiation technologies. Currently he is developing protocols for treating locally advanced pancreatic cancer and liver tumors with proton therapy, and he investigates new ways to make the treatment experience more comfortable for his patients.

Patient Education

Every step of your treatment is managed by a radiation oncologist who has dedicated his or her career to studying and treating gastrointestinal (GI) cancers.

In addition to the many services available at the Cancer Center, you have access to resources created especially for patients receiving radiation treatment for GI cancer, such as nutritional counseling and one-on-one assistance with managing symptoms.

Please ask us about any step in your treatment process. Answers to many frequently asked questions also appear in Your Guide to Radiation Therapy (PDF).

Clinical Trials

Massachusetts General Hospital invites patients and the community to participate in innovative clinical trials and research studies.

Search open clinical trials.


Contact Us

Clark Center for Radiation Oncology

Vida E & Arthur L. Goldstein Lunder Building

55 Fruit StreetLunder Building LL3 Boston, MA 02114
  • Near Public Transit
  • Accessible
  • Phone: 617-726- 8651
  • Fax: 857-238-6377
  • Email Us

Francis H. Burr Proton Therapy Center
30 Fruit Street
Boston, MA 02114
Phone: 617-726-0923 (Proton Inquiry Line: 617-724-1680)
Fax: 617-726-6498

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