Gastrointestinal Oncology Division

Phone: 551-996-5863
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Gastrointestinal Oncology Division comprises a specialized team of professionals who are dedicated to preventing, diagnosing, treating, and managing cancers of the gastrointestinal system (also called the digestive system). These include cancers of the colon, rectum, anus, bile ducts, gallbladder, liver, pancreas, small intestine, and stomach. The gastrointestinal oncology team brings together experts in gastroenterology, surgery, medical oncology, radiation oncology, radiology, pathology, and nursing. This specialized approach to treating gastrointestinal cancers provides patients with the exact type of services they need to battle their specific disease and its physical, emotional, and social side effects.

The gastrointestinal oncology team also works closely with the medical center's Hereditary Cancer Risk Assessment Program, which integrates screening and counseling services for women to determine their risk for breast, colorectal, ovarian, or uterine cancer.

Anal cancer
Bile Duct Cancer
Colorectal Cancer
Esophageal Cancer
Gallbladder Cancer
Gastrointestinal Carcinoid Tumors
Pancreatic Cancer
Primary Liver Cancer
Stomach (Gastric) Cancer

The Gastrointestinal Oncology Division Team

Co-Division Chief

Hematology/oncologist Andrew A. Jennis, M.D., is chief of the Division of Gastrointestinal Oncology at The Cancer Center at Hackensack University Medical Center. Dr. Jennis specializes in diagnosing and treating cancers of the gastrointestinal system, including cancers of the colon, rectum, anus, bile ducts, gallbladder, liver, pancreas, small intestine, and stomach. He collaborates with Co-Chief of the Division of Gastrointestinal Oncology Donald McCain, M.D., Ph.D., a surgical oncologist, and other surgeons and gastroenterologists in providing optimal care for patients with gastrointestinal cancers.
 Read full bio. 


Co-Division Chief

Surgical oncologist Donald A. McCain, M.D., Ph.D., specializes in the surgical treatment of cancers of the gastrointestinal system, including cancer of the pancreas, stomach, colon, liver, gall bladder, and small intestine. He is highly skilled in using a variety of state-of-the-art surgical techniques to treat cancer, including minimally invasive laparoscopic surgery and radiofrequency ablation.
 Read full bio.


Martin E. Gutierrez, M.D. is Director of the Drug Discovery and Phase I Unit at the John Theurer Cancer Center at Hackensack University Medical Center. Under Dr. Guiterrez’s leadership, the John Theurer Cancer Center works closely with industry, the National Cancer Institute-National Institutes of Health (NCI-NIH) and other academic institutions to expand its Phase I portfolio. Dr. Gutierrez also serves as Medical Oncologist in the division of Thoracic Oncology and Gastrointestinal Oncology.

Dr. Gutierrez brings extensive expertise leading Phase I and early stage cancer treatment research to the John Theurer Cancer Center. He has nearly two decades of drug discovery experience, including many years with the NCI-NIH and other leading institutes helping to bring new treatments to patients. Read full bio. 
Staff Doctors

Garth Ballantyne, M.D.
Douglas Benson, M.D.
Vivian Bethala, M.D.
Richard Chessler, M.D.
Marson Davidson, MD
Elie Elmann, M.D.
Peter Fan, M.D.
David Feit, M.D.
David Felig, M.D.
Loren Godfrey, M.D.
Rosario Ligesti, M.D.
Joseph Manno, M.D.

George Nikias, M.D.
Stephen Pereira, M.D.
Stephen Peters, M.D.
John W. Poole, M.D.
Charles Riccobono, M.D.
Vincent Rigoglioso, M.D.
Mark Tanchel, M.D.
Patrick Toth, M.D.
Robert Wallerstein, M.D.

Nurse Practitioner
Anne Marie Flaherty

Advanced Practice Nurse/Clinician
Laura Metcalfe

Case Manager
Cheryl McMahon