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目的探讨胃肠道间质瘤(GIST)的影像学特征,观察其CT征象与病理结果的诊断价值。方法选取胃肠道间质瘤患者42例,经病理形态学确诊并分为良性组、交界性组及恶性组,手术切除前经CT平扫及增强诊断其恶性程度,比较肿物大小、密度、形态、强化程度及强化方式等CT征象与肿瘤恶性程度的相关性。结果 CT显示不同恶性程度组别间质瘤肿物大小比较差异有统计学意义(P=0.024),肿物密度均匀性和边缘光滑度比较差异亦具有统计学意义(P=0.041,0.034),而肿物形态在良恶性间质瘤中差异无统计学意义(P=0.631);良性、交界性和恶性间质瘤中CT强化程度比较差异无统计学意义(P=0.628),而强化方式比较各组间差异有统计学意义(P=0.022)。结论 CT显示GIST肿物大小、边缘、密度、强化方式与肿瘤恶性程度相关,CT可作为诊断GIST及其良恶性的重要手段。
Objective To investigate the imaging features of gastrointestinal stromal tumors (GIST) and to observe the diagnostic value of CT signs and pathological findings. Methods Forty-two patients with gastrointestinal stromal tumors (GISTs) were selected and pathologically confirmed. The patients were divided into benign group, borderline group and malignant group. CT scan and enhanced diagnosis of malignancy before operation were performed. The tumor size, density , Morphology, degree of enhancement and enhancement of CT signs such as correlation with the degree of malignancy of the tumor. Results CT showed that there were significant differences in the size of stromal tumor between different malignant groups (P = 0.024), the differences of tumor density uniformity and marginal smoothness were also statistically significant (P = 0.041,0.034) There was no significant difference in tumor morphology between benign and malignant stromal tumors (P = 0.631). There was no significant difference in CT enhancement between benign, borderline and malignant stromal tumors (P = 0.628) The differences between the two groups were statistically significant (P = 0.022). Conclusion CT shows that the size, edge, density and enhancement of GIST are related to the degree of malignancy of the tumor. CT can be used as an important method to diagnose GIST and its benign and malignant diseases.