title: Gastrointestinal stromal tumor: 5 years later.
abstract: There is now considerable interest in gastrointestinal stromal tumor (GIST) because it can be treated effectively with a targeted molecular agent. The majority of GISTs contain an activating mutation in the KIT protooncogene or, occasionally, in the platelet-derived growth factor-alpha (PDGFRA) gene. Five years ago, imatinib mesylate, a specific molecular inhibitor of the protein products of these 2 genes, was applied to metastatic GIST. Approximately 80% of patients with metastatic GIST benefit from imatinib, although acquired resistance to the agent may develop. For patients with primary GIST, surgery remains the treatment of choice, and whether outcome is improved by adjuvant imatinib is currently under broad investigation. A combination of imatinib therapy and surgery also may be effective in a subset of patients with metastatic or unresectable primary GIST. In this review, the authors summarize the new multimodality approach to GIST. The integration of surgery and molecular therapy in GIST will serve as a prototype for the management of other solid tumors for which targeted agents become available.
authors.affiliation: Hepatobiliary Service, Memorial Sloan-Kettering Cancer Center, New York, New York 10021, USA.
authors.forename: Sanne M
authors.initials: SM
authors.lastname: van der Zwan
authors.forename: Ronald P
authors.initials: RP
authors.lastname: DeMatteo
mesh_terms: D000970:Antineoplastic Agents / Q000627:therapeutic use*; D001549:Benzamides; D002986:Clinical Trials as Topic; D003131:Combined Modality Therapy; D046152:Gastrointestinal Stromal Tumors / Q000473:pathology / Q000601:surgery / Q000628:therapy*; D006801:Humans; D000068877:Imatinib Mesylate; D009362:Neoplasm Metastasis / Q000188:drug therapy; D010879:Piperazines / Q000627:therapeutic use*; D011379:Prognosis; D011505:Protein-Tyrosine Kinases / Q000037:antagonists & inhibitors; D011743:Pyrimidines / Q000627:therapeutic use*
chemical_list: D000970:Antineoplastic Agents; D001549:Benzamides; D010879:Piperazines; D011743:Pyrimidines; D000068877:Imatinib Mesylate; D011505:Protein-Tyrosine Kinases