title: Factors associated with disease progression in patients with gastrointestinal stromal tumors in the pre-imatinib era.
abstract: The aim of this study was to determine the predictors of survival in 38 patients with curatively resected gastrointestinal stromal tumors (GISTs). The tumor was located in the stomach in 23 cases, the small bowel in 13, and the colon in 2. In 23 patients (61%), a mutation in exon 11 of the kit gene was detected. In 7 cases, all small gastric tumors, a mutation in the platelet-derived growth factor receptor a (PDGFRA) gene was detected. The overall 5-year survival rate was 70%. In 9 patients, GISTs relapsed, leading to an actuarial 5-year disease-free survival of 78%. By multivariate analysis, the presence of distant metastases, the proliferative (MIB-1) index, and deletional mutation in codons 557 and/or 558 of kit exon 11 correlated significantly with poor outcome. None of the PDGFRA mutant GISTs relapsed. These findings suggest a strong relationship between various tyrosine kinase receptor mutations and survival outcome in patients with GISTs.
authors.affiliation: Department of Surgery, University of Regensburg, Regensburg, Germany.
authors.forename: Igors
authors.initials: I
authors.lastname: Iesalnieks
authors.forename: Petra
authors.initials: P
authors.lastname: Rümmele
authors.forename: Wolfgang
authors.initials: W
authors.lastname: Dietmaier
authors.forename: Thomas
authors.initials: T
authors.lastname: Jantsch
authors.forename: Carl
authors.initials: C
authors.lastname: Zülke
authors.forename: Hans J
authors.initials: HJ
authors.lastname: Schlitt
authors.forename: Ferdinand
authors.initials: F
authors.lastname: Hofstädter
authors.forename: Matthias
authors.initials: M
authors.lastname: Anthuber
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D001549:Benzamides; D018450:Disease Progression; D005260:Female; D046152:Gastrointestinal Stromal Tumors / Q000235:genetics / Q000401:mortality* / Q000473:pathology / Q000601:surgery; D006801:Humans; D000068877:Imatinib Mesylate; D007150:Immunohistochemistry; D008297:Male; D008875:Middle Aged; D009154:Mutation; D010879:Piperazines / Q000627:therapeutic use; D019009:Proto-Oncogene Proteins c-kit / Q000235:genetics; D011743:Pyrimidines / Q000627:therapeutic use; D020796:Receptor, Platelet-Derived Growth Factor alpha / Q000235:genetics
chemical_list: D001549:Benzamides; D010879:Piperazines; D011743:Pyrimidines; D000068877:Imatinib Mesylate; D019009:Proto-Oncogene Proteins c-kit; D020796:Receptor, Platelet-Derived Growth Factor alpha