Prof. Dr. Jeroen Dekervel is a GI oncologist working at the Digestive Oncology Unit of UZ Leuven, Belgium. In daily clinical practice, he treats all kinds of gastrointestinal malignancies at one of the largest clinics of its kind in Europe. He is an associate professor at the KU Leuven, where his research focuses on unraveling the reasons for success and failure of immunotherapies in GI tumours, using a variety of single cell techniques and liquid biopsy approaches. He is a member of ESMO and ASCO, as well as part of the ESMO upper GI faculty as a mentee.