CT强化率及形态学在鉴别胃黏膜下肿瘤的应用价值  

Application value of CT enhancement ratio and morphology in differentiating of gastric submucosal tumor

作　　者：钟德琳 彭鹏[1] 郭敏 齐国将 蓝海梅 Kasmika Ghimire ZHONG Delin;PENG Peng;GUO Min;QI Guojiang;LAN Haimei;KASMIKA Ghimire(Department of Radiology,the First Affiliated Hospital of Guangxci Medical University,Nanning 530021,China)

机构地区：[1]广西医科大学第一附属医院放射科,广西南宁530021

出　　处：《实用放射学杂志》2020年第1期65-68,135,共5页Journal of Practical Radiology

摘　　要：目的分析常见胃黏膜下肿瘤(GST)的CT征象及强化率.方法选取术后病理证实为GST[间质瘤(GIST)63例、胃平滑肌瘤19例、胃原发性淋巴瘤14例]的术前CT资料.统计分析肿瘤大小、长短径比值、密度等形态学征象及各期强化率.结果GST的动脉期强化率、静脉期强化率、长短径比值、部位、轮廓、密度、肿瘤内低密度灶、强化方式、强化程度、黏膜及浆膜的总体差异有统计学意义(P<0.05);ROC曲线显示,当静脉期强化率>0.74时,诊断为GIST的AUC、敏感度、特异度分别为0.868,79.37%,81.82%.结论静脉期强化率>0.74在诊断GIST时可提供参考价值,结合形态学征象可提高胃平滑肌瘤与胃原发性淋巴瘤的诊断.Objective To analyze the CT signs and enbancement ratio of common gastric subnucosal tumors(GST).Methods Preoperative CT data of GST[including gast rointestinal stromal tumors(GIST)in 63 cases,gastric leiomyoma in 19 cases and gastrie primary lymphoma in 14 cases]confirmed by pathology after operation were selected.Morphological features such as tumor size,long/short ratio,density and enhancement rate at different stagcs were statistically analyzed.Results It was statistically significant in the overall difference of arterial phase enhancement rate,venous phase enhancement rate,long/short ratio,location,contour,density,intratumoral low density focus,enhancement pattern,enhancement degree,mucosa and serosa of the above GST(P<0.05).The ROC curve showed that when the enhancement ratio in venous phase was greater than 0.74,AUC,sensitivity and specificity of diagnosing GIST were 0.868,79.37%and 81.82%,respectively.Conclusion The enhancement ratio in venous phase is higher than 0.74,which can be used as a reference in the diagnosis of GIST.Combing with morphological features,the diagnosis of gastric leiomyoma and gastric primary lymphoma can be improved.

关 键 词：胃黏膜下肿瘤 强化率 计算机体层成像 

分 类 号：R735.2[医药卫生—肿瘤] R814.42[医药卫生—临床医学]