25例胃间质瘤的CT表现及其诊断价值

目的分析胃间质瘤（GST）的CT表现，探讨CT对其临床诊断价值。方法回顾性分析经手术病理证实的25例GST患者的CT及相关临床资料。结果GST的CT表现为软组织肿块，肿块向胃腔内、外或同时向腔内外突出，肿块的密度均匀或不均匀伴有大小不等，形态不一；增强后，肿块均匀强化或不规则强化，可见中心坏死及远处转移灶。本组病例中良性7例，肿块直径多数小于5cm，边界较清楚，CT显示多为均匀强化；恶性13例，肿块直径多数大于5cm，边界欠清楚，CT显示为不规则强化，肿块内有坏死表现或转移灶。结论CT可清楚显示肿块的外部形态、内部改变及其与周围脏器的关系，对GST的定位定性诊断及鉴别诊断具有重要价值。

CT manifestation of 25 cases with gastric stromal tumor and its diagnostic value

Objective To investigate the CT features of gastric stromal tumors （GST） and evaluate CT value in the diagnosis of the disease. Methods Clinical data and CT findings in 25 cases with GST proved pathologically were retrospectively analyzed. Results CT findings of GST showed that the lesions were intra-luminal, extra-luminal or both intra-and extra-luminal soft tissue mass and showed homogeneous density or heterogeneous density on plain CT scan. Lesions showed the mass uniform or irregular strengthened, visible central necrosis and distant metastasis on enhanced CT scan. In patients with GST, 7 cases were benign and 13 cases were malignant. The benign lesions were usually below 5 cm in size with well-defined margin and displayed homogeneous enhancement. The malignant lesions were illdefined and over 5 cm in size with necrosis within the tumors or metastasis. Conclusion CT can detect and precisely localize GST, and it is helpful in differentiation of benign or malignant GST.