Faculty and Staff

Physicians

Evan S. Dellon, MD, MPH

Associate Professor of Medicine and Epidemiology
Director of the Center for Esophageal Diseases and SwallowingEvan-S-Dellon.jpg

Dr. Dellon received his undergraduate degree from Brown University and his medical degree from Johns Hopkins School of Medicine. He completed internship and residency in Internal Medicine at Massachusetts General Hospital. After residency, he remained at Massachusetts General for two years working as a Hospitalist and Assistant in Medicine as well as an Instructor at Harvard Medical School. He subsequently moved to Chapel Hill and completed both a clinical and a research fellowship in Gastroenterology at UNC, during which he received a master’s degree in Epidemiology from the UNC School of Public Health. His clinical training has also included experience with endoscopic retrograde cholangiopancreatography and endoscopic ultrasound.

Dr. Dellon has been at the Center for Esophageal Diseases and Swallowing since 2008. Dr. Dellon’s main research interest is in the epidemiology, pathogenesis, diagnosis, and treatment of eosinophilic esophagitis (EoE). He also has research interests in advanced endoscopic techniques. He is a member of several professional societies, including the American Gastroenterological Association, the American College of Gastroenterology, the American Society of Gastrointestinal Endoscopy, and the North Carolina Society of Gastroenterology. Dr. Dellon receives research funding from an American College of Gastroenterology Junior Faculty Development Award as well as an intramural NIH KL2 Career Development Award.


Dr. Dellon Publications


Nicholas J. Shaheen, MD, MPH

Chief, Division of Gastroenterology and Hepatology
Professor of Medicine and Epidemiology

Dr. Shaheen attended college at Harvard University, and earned his medical degree at the University of Chicago, Pritzker School of Medicine, where he fulfilled his internship and residency requirements. He completed his clinical fellowship training at the University of North Carolina at Chapel Hill, earned his masters degree at the UNC School of Public Health, and completed a National Institutes of Health fellowship in Epidemiology. For the last 12 years, he has been a faculty member at UNC.

Dr. Shaheen's research interest is in the epidemiology and management of esophageal diseases. He is the author of numerous journal articles and book chapters related to reflux disease, motility disorders, Barrett’s esophagus, and esophageal cancer. He is currently on the editorial board of Gastroenterology and Clinical Gastroenterology & Hepatology, and is a reviewer for numerous journals including Gut, Alimentary Pharmacology and Therapeutics, Gastroenterology and Hepatology, American Journal of Medicine, JAMA, and American Journal of Gastroenterology.

Dr. Shaheen receives research funding from the National Institutes of Health, multiple private foundations, and corporations to pursue clinical and translational research in esophageal diseases. Dr. Shaheen is a member of several professional societies, including the American Gastroenterological Association, the American Society of Gastrointestinal Endoscopy, the American Medical Society, and the North Carolina Medical Society. He is a Fellow of the American College of Gastroenterology, the American Gastroenterological Association, and the American College of Physicians. He is the President of the North Carolina Society of Gastroenterology, and the Vice-Chair of the Clinical Practice section of the AGA.


Dr. Shaheen Publications


Ryan D. Madanick, MD

Dr. Madanick

Assistant Professor of Medicine

Director, Gastroenterology & Hepatology Fellowship Program

Dr. Madanick attended the University of Miami in the Honors Program in Medicine, where he earned both his undergraduate and medical degrees. He completed his residency in Internal Medicine at Thomas Jefferson University Hospital in Philadelphia, Pennsylvania, where he was awarded Intern of the Year and Outstanding Teaching Resident. He returned to Miami for his subspecialty fellowship in gastroenterology at Jackson Memorial Hospital/University of Miami Medical Center. After completing his fellowship, he stayed on the faculty at the University of Miami until he moved to UNC in November 2006. He is board certified in Internal Medicine and Gastroenterology. His main clinical and research interests include refractory gastroesophageal reflux disease, extraesophageal reflux disease, Barrett’s esophagus, and esophageal motility disorders, with a prime focus on diagnosis and treatment strategies of patients with GERD who do not respond to therapy.


Dr. Madanick Publications

Roy C. Orlando, MD

Roy C. Orlando, MD

Emeritus Professor of Medicine

Adjunct Professor of Cell and Molecular Physiology

Dr. Orlando attended Georgetown University Medical School in Washington, D.C., was elected to AOA and graduated Cum Laude with an M.D. degree. He did his GI Fellowship at UNC and, after 2 years of military service, joined the UNC faculty. He rose to the rank of Professor of Medicine and left UNC in 1992 to assume the position of Chief of Gastroenterology & Hepatology at Tulane University in New Orleans. During his tenure at Tulane, he was also Director of the Center for Esophageal & Swallowing Disorders. In July 2007, Dr. Orlando, an internationally-recognized expert in esophageal disease, returned to UNC as full time faculty member. He is also an outstanding clinician, having been listed continuously among the ‘Best Doctors In America: Southeast Region’ from 1996 -2007.  Dr. Orlando is an Emeritus Professor of Medicine as of 2016.

 

Dr. Orlando Publications

Shifali Arora, MDShifali Arora

Assistant Professor of Medicine

Adjunct Professor of Cell and Molecular Physiology

Clinical Focus: General Gastroenterology and Endoscopy.

Academic Interests: My research interest is focused on quality improvement as well as the study and use of novel health technologies to better evaluate and treat gastrointestinal diseases. Specifically looking at ways in which sensors and apps can be incorporated into clinical care.


Clinicians

Melissa Spacek, NP, BSN, CGRN

Adult Nurse Practitioner

Melissa Spacek received her BSN at Gannon University in Erie, PA. Prior to coming to Chapel Hill, she worked in Neurology at the Medical University of South Carolina in Charleston. She joined the UNC team in March of 1996. Melissa initially worked as a staff nurse in general medicine when coming to UNC. She proceeded to specializing in Gastroenterology and Hepatology in 1997, where she joined the endoscopy staff, initially as a procedural nurse and then moving to management of UNC’s Endoscopy department. She received her certification in Gastroenterology in 2001. Melissa joined UNC’s Center for Esophageal Diseases and Swallowing in April of 2004. She is involved in both research and clinical, specializing in esophageal disorders. She is presently enrolled in UNC’s Adult Nurse Practitioner Program.

Melissa Spacek Publications

Kathleen Ferrell, PA-C, MPAS

Physician Assistant 

Kathleen A. Ferrell is a certified Physician Assistant for the CEDAS group at UNC.  Kathleen graduated from the Physician Assistant program at Jefferson College of Health Sciences in Roanoke, Virginia in 2007.  She then completed her Masters of Physician Assistant Studies (MPAS) degree from the University of Nebraska.  Kathleen worked for a private practice gastroenterology group in Christiansburg, VA for several years, before relocating to Chapel Hill, NC to work with the Center for Esophageal Diseases and Swallowing in June, 2010.  She works directly with Drs. Madanick, Shaheen, Dellon, and Orlando to diagnose and treat patients with a multitude of esophageal diseases including Barrett’s esophagus, eosinophilic esophagitis, functional esophageal disorders and gastroesophageal reflux.



Surgical Collaborators

Marco Patti, MD, FACS

Professor of Surgery
Surgical Co-Director, Center for Esophageal Diseases and Swallowing

Timothy M Farrell, MD, FACS

Professor of Surgery

Meredith C. Duke, MD, MBA

Assistant Professor of Surgery


Research Associates

Xiaoxin (Luke) Chen, MD, PhD

Dr. Chen
Xiaoxin (Luke) Chen, MD, PhD
Associate Professor of Biology at the Cancer Research Program, Julius L. Chambers Biomedical/Biotechnology Research Institute, North Carolina Central University (NCCU).

Dr. Chen is a member of the Center for Esophageal Diseases and Swallowing (CEDAS) at the University of North Carolina.  Dr. Chen earned his medical degree at the Peking University Health Science Center (formerly Beijing Medical University), where he fulfilled his internship and continued as a resident (Orthopedic Surgery) for three years. He then went to Rutgers University, where he earned his PhD degree (Biochemistry) at the Ernest Mario School of Pharmacy. Next, he became a faculty member of the Susan Lehman Cullman Laboratory of Medicine, Department of Chemical Biology, Rutgers University. In 2005, he became a faculty member at NCCU, and joined CEDAS.

His research interest is molecular mechanism and prevention of Barrett's esophagus and esophageal adenocarcinoma. His lab also works on how inflammation may contribute to oral cancer and prostate cancer. He has authored numerous journal articles and book chapters related to oral and esophageal diseases. He is currently a reviewer for numerous journals. Dr. Chen receives research funding from the National Institutes of Health, Department of Defense, private foundations and corporations to pursue basic and translational research in Barrett's esophagus and esophageal adenocarcinoma. Dr. Chen is a member of several professional societies, including the American Association for Cancer Research.


Research Staff

Susan E. Moist, MPH, CCRP

Director of Clinical Trial Operations