MSCTA在胃肠道间质瘤起源诊断中的价值

MSCTA Diagnosis in the Origin of Gastrointestinal Stromal Tumor

目的 探讨多层螺旋CT血管造影（multi—slicespiral CT angiography，MSCTA）在外生性胃肠道间质瘤（gastroinlestinal stromal tumor，GIST）起源诊断中的价值。资料与方法对经手术证实的21例外生性GIST患者采用容积再现（VR）血管生长技术（AV），观察肿瘤供血动脉及门静脉侧支循环情况，判断肿瘤的起源，并与手术结果进行对照。结果21例中，发生于胃12例，小肠6例，结肠2例，1例来源于肠道（具体起源不明）。肿瘤最大径5．5～20．5CIn，平均9．3cm。21例肿瘤主要供血动脉均得以显示，定位诊断准确20例。瘤周门静脉侧支循环发生11例。结论MSCTA显示肿瘤供血动脉准确性高，是判断GIST起源的主要依据。

Objective To investigate the value of multislice spiral CT angiography （MSCTA） in diagnosing the origin of gastrointestinal stromal tumor （GIST）. Materials and Methods 19 exogenous gastrointestinal stromal tumors confirmed by operation were analyzed retrospectively. Vascular three-dimensional reconstruction with volume rendering （VR） based on add vessel （AV） were performed on workstation for all patients. The origin of the tumor was judged by the feeding artery and the collateral circulation of the portal vein, and then the results were compared with operation. Results Among 21 Gusts,there were 12 tumors raised from stomach,6 from small intestinal tract and 2 from colon, and 1 came from un- known the exact location of intestinal tract. The maximum diameter of these tumors ranged from 5.5 cm to 21.5 cm,the average was 9.3 cm. The accuracy rate of location diagnosis to tumor was 95.2% （20/21） according to the feeding artery which display rate was 100% （21/21）. The incidence rate of the collateral circulation of the portal vein surrounding the tumor was 52.4% （ 11/21 ）. Conclusion MSCTA can provide important evidence to the origin of GIST.