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目的分析胃肠间质瘤(GIST)的CT及MR表现,探讨该肿瘤的影像学特征,提高诊断水平。方法回顾性分析经手术病理证实的9例GIST患者的术前CT及MRI检查结果。结果术后病理显示肿瘤发生于胃6例,小肠3例。病理证实9例GIST中,良性7例,肿瘤最大径<5cm,边界较清楚,密度较均匀;恶性2例,肿块最大径>6cm,肿瘤边缘有分叶,坏死常见。肿瘤病变呈现等T1稍长T2信号,动态增强肿瘤多数呈不均匀强化,静脉期持续强化。结论 GIST的影像学表现有特征性,CT及MR检查相结合,可以获得较高的诊断准确性。
Objective To analyze the CT and MR findings of gastrointestinal stromal tumors (GIST), discuss the imaging characteristics of the tumor and improve the diagnostic value. Methods The CT and MRI findings of 9 GIST patients confirmed by surgery and pathology were analyzed retrospectively. Results Postoperative pathology showed that the tumor occurred in 6 cases of stomach and 3 cases of small intestine. Pathological confirmed 9 cases of GIST, benign in 7 cases, the maximum diameter of tumor <5cm, the border is clear, the density is more uniform; malignant in 2 cases, the largest tumor diameter> 6cm, tumor edge lobulation, necrosis common. Tumor lesions showed T1 slightly longer T2 signal, the majority of dynamic enhanced tumor heterogeneous enhancement, continuous enhancement of the venous phase. Conclusion The imaging findings of GIST are characteristic. The combination of CT and MR examination can obtain high diagnostic accuracy.