[Pathology and molecular biology of gastrointestinal stromal tumors (GIST)].
Gastrointestinal stromal tumors (GIST) show an aggressive behavior with metastases and recurrences in up to 50% of cases. They can be clearly distinguished from other mesenchymal tumors by immunohistochemistry in the vast majority of cases. Of the tumors 85% carry somatic activating mutations in the receptor tyrosine kinases KIT or PDGFRA. The detection of these molecular events has changed the treatment of inoperable and metastatic GISTs dramatically as up to 80% of tumors respond well to tyrosine kinase inhibitors. This treatment has become the gold standard in the last few years with only few side effects. Knowledge of the underlying KIT or PDGFRA mutation is both relevant for the prognosis and treatment response.
Institut für Pathologie, Universitätsklinikum Bonn, Sigmund-Freud-Strasse 25, Bonn, Germany.
H-U
HU
Schildhaus
S
S
Merkelbach-Bruse
R
R
Büttner
E
E
Wardelmann
D000970:Antineoplastic Agents / Q000627:therapeutic use; D004252:DNA Mutational Analysis; D005500:Follow-Up Studies; D046152:Gastrointestinal Stromal Tumors / Q000235:genetics* / Q000473:pathology* / Q000628:therapy; D041981:Gastrointestinal Tract / Q000473:pathology; D006801:Humans; D011379:Prognosis; D011505:Protein-Tyrosine Kinases / Q000037:antagonists & inhibitors; D019009:Proto-Oncogene Proteins c-kit / Q000235:genetics*; D020796:Receptor, Platelet-Derived Growth Factor alpha / Q000235:genetics*
D000970:Antineoplastic Agents; D011505:Protein-Tyrosine Kinases; D019009:Proto-Oncogene Proteins c-kit; D020796:Receptor, Platelet-Derived Growth Factor alpha