His main research areas deal with tumour biology, gastrointestinal cancer, malignant lymphomas, radiotherapy and psychosocial care. He has an interest in better understanding the reasons why certain individuals get anal cancer and malignant lymphomas, how to best stage different tumours, and what influences the choice of therapy. His aim is to further develop clinical prognostic and predictive markers and study the short and long-term effects of various treatments in exploratory and randomised clinical trials.