title: Gastrointestinal stromal tumors: chemotherapy and imatinib.
abstract: Gastrointestinal stromal tumors (GISTs), previously thought to arise from the smooth muscles of the gastrointestinal tract, have recently been identified as a separate clinicopathologic entity. This new entity was revealed when investigations using more refined techniques suggested that GISTs had neural rather than smooth muscle differentiation and expressed the cell surface receptor Kit (CD117). Ensuing research led to development of a new molecularly targeted therapy, imatinib mesylate, which showed significant response among GIST patients in initial clinical trials. This review describes treatment of GIST before and after imatinib and the significance of this accomplishment.
mesh_terms: D000970:Antineoplastic Agents / Q000627:therapeutic use*; D001549:Benzamides; D002986:Clinical Trials as Topic; D004791:Enzyme Inhibitors / Q000627:therapeutic use; D005770:Gastrointestinal Neoplasms / Q000000981:diagnostic imaging / Q000188:drug therapy* / Q000378:metabolism / Q000601:surgery; D006801:Humans; D000068877:Imatinib Mesylate; D010879:Piperazines / Q000627:therapeutic use*; D011505:Protein-Tyrosine Kinases / Q000037:antagonists & inhibitors; D019009:Proto-Oncogene Proteins c-kit / Q000032:analysis / Q000187:drug effects; D011743:Pyrimidines / Q000627:therapeutic use*; D012509:Sarcoma / Q000000981:diagnostic imaging / Q000188:drug therapy / Q000378:metabolism / Q000601:surgery; D013274:Stomach Neoplasms / Q000000981:diagnostic imaging; D017154:Stromal Cells; D014055:Tomography, Emission-Computed; D014057:Tomography, X-Ray Computed
chemical_list: D000970:Antineoplastic Agents; D001549:Benzamides; D004791:Enzyme Inhibitors; D010879:Piperazines; D011743:Pyrimidines; D000068877:Imatinib Mesylate; D011505:Protein-Tyrosine Kinases; D019009:Proto-Oncogene Proteins c-kit