132例胃的胃肠间质瘤治疗及预后分析

Analysis of treatment and prognosis in 132 patients with gastric gastrointestinal stromal tumors

目的 探讨胃的胃肠间质瘤（GIST）临床病理特点和治疗及影响预后的因素.方法 回顾性分析1998年1月至2008年12月天津医科大学附属肿瘤医院收治的经手术治疗的132例胃GIST患者的临床病理资料,并比较不同因素对预后的影响.结果 本组患者病变部位：胃底贲门50例（37.9%）,胃体62例（47.0%）,胃窦部13例（9.8%）,占据胃壁两个部位6例（4.5%）,胃弥漫肿物1例（0.8%）;肿瘤平均直径9.4（1.0～27.0）cm.全组患者均行肿瘤完整切除,有41例联合脏器切除,淋巴结清扫34例,未发现转移淋巴结.免疫组织化学染色,CD117阳性率93.2%（123/132）,CD34阳性率82.6%（109/132）.118例获随访患者的1、3、5年生存率分别为94.7%、80.2%和56.6%.单因素分析显示,Fletcher分级、肿瘤大小、肿瘤侵犯其他脏器、转移和口服甲磺酸伊马替尼对生存率有影响（P＜0.05,P＜0.01）;多因素分析显示,Fletcher分级、肿瘤转移、口服甲磺酸伊马替尼是预后的独立影响因素（P＜0.05）.结论 转移是影响胃GIST预后的独立危险因素,Fletcher分级是判断胃GIST生物学行为及预后简单有效的方法;手术是治疗胃GIST的主要方法,靶向治疗能进一步改善胃GIST患者的预后.

Objective To investigate the clinicopathological characteristics, diagnosis, treatment and prognostic factors of gastric gastrointestinal stromal tumors （GIST） in the stomach. Methods The clinicopathological data of 132 patients with gastric GIST between January 1998 and December 2008 were analyzed retrospectively, and the prognostic factors were evaluated. Results Tumor locations were the cardia or fundus（50, 37.9%）, the stomach body（62, 47%）,the antrum（13, 9.8%）, and two regions were found in 6 cases（4.5%）, three regions in 1 cases（0.8%）. Tumor size ranged from 1.0 to 27.0 cm with an average of 9.4 cm. All the patients underwent complete tumor resection, including multi-organ resection in 41 cases. Thirty-four cases underwent lymph node dissection. All the lymph nodes were negative. The positive rate was 93.2%（ 123/132） for CD 117 and 82.6%（109/132） for CD34. The 1-,3- and 5-year survival rates of the 118 cases with follow up were 94.7%, 80.2%, and 56.6% , respectively. Univariate analysis revealed that the differences in Fletcher classification, tumor size, infiltration to surrounding tissue, preoperative metastasis, and adjuvant postoperative therapy with imatinib were related to the survival rates. Multivariate analysis demonstrated that Fletcher classification, preoperative metastasis and adjuvant postoperative therapy with imatinib were independent poor prognostic factors for survival. Conclusions Preoperative metastasis is an independent factor predicting poor prognosis of gastric GIST. Fletcher classification can be used to evaluate the biological behaviors and prognosis, while surgery is the main therapy and targeted therapy can improve survival of gastric GIST.