Hello, my name is Peter Siersema


I started working as Professor of Endoscopic Gastrointestinal Oncology in January 2016, in the first few months only part-time, but since May 2016 for 100% of the time. I commute once or twice a week between my home town Rotterdam and Nijmegen. The other nights I stay in an apartment close to the Radboudumc.

I started my career at the Erasmus MC in Rotterdam where I was trained and later became chief of the Endoscopy unit. After an exciting period at the Stanford University in California, I was appointed Professor of Gastroenterology and Chief at the Dept. of Gastroenterology and Hepatology of the UMC Utrecht. I worked there for almost 10 years when I decided that it was time for a new challenge with more focus on research and that’s why I decided to move even more eastern to the Radboudumc.

My research interests include pre-malignant and malignant diseases of the gastrointestinal tract, especially esophageal cancer and its precursor Barrett’s esophagus, and colorectal cancer and its precursor adenomatous polyps. I am involved in the development of new devices and technologies for diagnostic and therapeutic endoscopy, i.e. endoscopic imaging, endoscopic resection, stent placement and non-invasive treatment of gastro-esophageal reflux disease and obesity, all with the aim to make treatments for patients minimally-invasive and patient-friendly.

Additionally, I am the current chair of the Dutch Society of Gastroenterology and I chair the committee that revises the Dutch Gastroenterology Fellowship curriculum. On an international level I am the chair of the Guideline committee of the International Society for Diseases of Esophagus (ISDE). In the remaining time, I serve as Editor-in-Chief of the journal Endoscopy.

As the best research comes from input from various experts, I look forward to the collaboration with colleagues form various departments and institutions at the Radboudumc. Moreover, feedback and participation from medical students, residents and fellows is beyond any doubt a “sine qua non” for a flourishing research line in an academic setting.




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