Clinical studies on mortality and morbidity in patients with pituitary tumors as well as translational studies aiming to find genetic markers of aggressiveness. A large part of my clinical research has been conducted in the field of growth hormone. Several of the ongoing projects are done in collaboration with Sahlgrenska Cancer Centre (Gothenburg, Sweden), the Department of Neurosurgery, Friedrich-Alexander University (Erlangen, Germany) and Erasmus University (Rotterdam, The Netherlands).