Clinicopathological significance of c-KIT mutation in gastrointestinal stromal tumors: a systematic review and meta-analysis.
Many types of KIT mutations have been observed in gastrointestinal stromal tumors (GISTs), but their prognostic and predictive significance are still unclear. A meta-analysis and literature review were conducted to estimate the contribution of KIT mutations in prognostic parameters and clinic-pathological significance of GISTs. A total of 18 relevant articles from PubMed, EMBASE and Web of Science databases were included in this study. The frequency of KIT mutation was significantly increased in the GIST patients with higher mitosis (≥5/50 high-power fields (HPFs) and larger size (≥5 cm) of tumors than in those with lower MI (≤5/50HPFs) and smaller size (≤5 cm) of GISTs respectively. The rate of KIT mutation was not significantly changed between GISTs in stomachs and in small intestines. KIT mutational status has prognostic significance for patients' outcome. GIST patients with KIT exon 9 mutations have higher risk of progression than those with exon 11 mutations. 5 year relapse-free survival (RFS) rate was significantly higher in patients with KIT exon 11 deletion than in those with other type of KIT exon 11 mutations. The deletion involving KIT exon 11, particularly codons 557-558, is a valuable predictor of prognosis for patients with GISTs.
Department of oncology, Shandong Jiaotong Hospital, Jinan, 250031, P.R.China.
Lin
L
Yan
Department of gastrointestinal surgery, Shandong Cancer Hospital, Jinan, 250017, P.R.China.
Lei
L
Zou
Department of oncology, Shandong Provincial Qianfoshan Hospital, Shandong University, Jinan, 250014, P.R.China.
Wenhua
W
Zhao
Department of oncology, Shandong Jiaotong Hospital, Jinan, 250031, P.R.China.
Yansen
Y
Wang
Department of gastrointestinal surgery, Shandong Provincial Qianfoshan Hospital, Shandong University, Jinan, 250014, P.R.China.
Bo
B
Liu
Department of General Surgery, Second Xiangya Hospital of Central South University, Changsha 410011, China.
Hongliang
H
Yao
Department of gastrointestinal surgery, Shandong Provincial Qianfoshan Hospital, Shandong University, Jinan, 250014, P.R.China.
Haihua
H
Yu
D005091:Exons; D046152:Gastrointestinal Stromal Tumors / Q000175:diagnosis* / Q000235:genetics* / Q000401:mortality; D056726:Genetic Association Studies; D020022:Genetic Predisposition to Disease; D006801:Humans; D009154:Mutation; D016017:Odds Ratio; D011379:Prognosis; D019009:Proto-Oncogene Proteins c-kit / Q000235:genetics*; D020796:Receptor, Platelet-Derived Growth Factor alpha / Q000235:genetics; D012306:Risk
D019009:Proto-Oncogene Proteins c-kit; D020796:Receptor, Platelet-Derived Growth Factor alpha