胃肠道间质瘤的CT诊断价值

CT diagnostic value in gastrointestinal stromal tumors

目的 分析胃肠道间质瘤CT征象 ,评价CT的诊断价值。方法 回顾性分析 18例病理证实为胃肠道间质瘤(GISTs)患者的CT平扫和双期动态强化螺旋CT扫描。结果 18例GISTs发生在胃 9例 ,小肠 9例 ;良性 6例 (均发生在胃 ) ,潜在恶性 3例 (胃 2例 ,小肠 1例 ) ,恶性 9例 (胃 1例 ,小肠 8例 ) ;多为边界清楚 (16/ 18,88.9% )、圆形或类圆形 (11/18,61.1% )、密度均匀 (10 / 18,5 5 .6% )的肿块。良性GISTs多强化均匀 (5 / 6,83 .3 % ) ,恶性者密度不均匀 (7/ 12 ,5 8.3 % ) ,强化不均匀 (11/ 12 ,91.7% )。本组对GISTs的定位准确率和定性准确率分别为 89.5 % (16/ 18)和 83 .3 % (15 / 18)。结论 CT能准确显示GISTs的部位、形态和大小 ,鉴别肿瘤良恶性 ,具有重要临床价值。

Objective To investigate the diagnostic value of CT in gastrointestinal stromal tumors (GISTs). Methods Both plain and two phase dynamic enhanced spiral CT features in 18 cases with pathologically proved GISTs were retrospectively analyzed. Results Eighteen GISTs originated from stomach ( n =9) or small bowel ( n =9), in which 6 benign tumors located in stomach, 12 cases of malignant or potential malignant tumors in stomach ( n =3) or in small bowel ( n =9). CT findings of GISTs included well defined tumor margin (16/18, 88.9%), round or oval in shape(11/18, 61.1%) and homogeneous density (10/18, 55.6%). The benign tumors displayed homogeneous enhancement (5/6,83.3%), whereas the malignant were heterogeneous density both on plain (7/12, 58.3%) and enhanced (11/12, 91.7%) CT scans. Accuracy of CT diagnosis for location and pathologic features of GISTs were 89.5% (16/18) and 83.3% (15/18), respectively. Conclusion CT is a valuable examination for GISTs. CT can precisely display the location, shape and size of GISTs, and thus is very helpful to differentiate the benign from the malignant tumors.