Gastro-Intestinal Stroma Tumor (GIST) is a rare form of cancer of the stomach or small intestine. Up to now, only one effective treatment has existed for GIST: the use of Glivec. However, over time, this remedy becomes ineffective for a large percentage of the patients. Along with colleagues in Leuven, the research group of Peter Marynen of the Flanders Interuniversity Institute for Biotechnology (VIB), connected to the Catholic University of Leuven, has uncovered the process underlying the frequent ineffectiveness of Glivec. In addition, the researchers have shown that PKC412 - an experimental drug currently in the second phase of clinical research - can be effective in helping these patients once again. This possible alternative to Glivec, and the genetic understanding of the development of resistance to Glivec, should make it possible to prescribe a new highly targeted therapy for patients in the future.