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目的:探讨胃肠道间质瘤(GISTs)的多层螺旋CT表现及其诊断价值。材料和方法:收集经手术病理证实的GISTs23例,术前均行多层螺旋CT平扫及双期增强扫描。结果:23例中,肿瘤发生于胃12例,空、回肠7例,十二指肠2例,食道和小肠系膜各1例。良性间质瘤5例,交界性2例,恶性间质瘤16例。良性平均直径3.6cm,交界性平均直径4.4cm,恶性者平均直径6.7cm。病灶多呈圆形或类圆形。平扫:呈均匀等密度7例;肿块周边呈等密度,中央低密度区15例;混杂密度1例。增强:病灶呈明显均匀强化6例;病灶不均匀强化,其中可见散在囊状坏死17例。结论:多层螺旋CT是目前GISTs检查的最佳选择,并能通过多方位重建(MPR)更清晰显示病灶各项特征,多层CT血管造影三维成像(3D-MSCTA)寻找肿瘤血管及其他血管变化,显著提高了GISTs的检出率和诊断准确率,对GISTs的定位和定性诊断具有重要价值。
Objective: To investigate the multi-slice spiral CT findings of gastrointestinal stromal tumors (GISTs) and their diagnostic value. MATERIALS AND METHODS: Twenty-three patients with pathologically confirmed GISTs were collected. The patients underwent multi-slice spiral CT scan and double-phase enhanced scan before operation. Results: Of the 23 cases, tumors occurred in 12 cases of stomach, 7 cases of empty and ileum, 2 cases of duodenum, 1 case of esophagus and small mesentery. 5 cases of benign stromal tumors, borderline in 2 cases, 16 cases of malignant stromal tumors. The average diameter of benign 3.6cm, the average junction diameter of 4.4cm, the average diameter of malignant 6.7cm. Mostly round or round lesions. Plain scan: uniform density was 7 cases; mass was the same density around the central low density area in 15 cases; mixed density in 1 case. Enhanced: lesions were significantly enhanced in 6 cases; lesions were not uniformly enhanced, which showed scattered cystic necrosis in 17 cases. Conclusions: MSCT is the best choice for GISTs examination at present and can be used to identify tumor features and multi-slice CT angiography three-dimensional imaging (3D-MSCTA) by multi-orientation reconstruction (MPR) Variations significantly improve the detection rate and diagnostic accuracy of GISTs, which is of great value for the localization and qualitative diagnosis of GISTs.