胃部胃肠间质瘤的CT征象与恶性程度的关系

Correlation between CT images and malignant grades of gastrointestinal stromal tumors in stomach

目的:探讨胃部胃肠间质瘤(GIST)的相关CT征象与肿瘤恶性程度间的关系。方法:选择经手术及病理证实并有详细恶性程度分级的胃部胃肠间质瘤病理21例进行回顾性分析。观察病灶的大小及坏死灶与肿瘤恶性程度分级间的关系。结果:本组病例40岁以下高度恶性就有3例,占总比例的14%,占40岁以下病例组的60%。肿瘤的最大径<30 mm时恶性程度较低,最大径>50 mm时恶性程度较高。无坏死的病灶恶性程度较低,有坏死的病灶恶性程度较高。可确定为低度恶性的征象有肿瘤最大径<30 mm,无坏死。结论:肿瘤恶性程度的鉴别与"年龄"及"性别"关系不大。肿瘤的恶性程度与"大小"及"坏死程度"关系密切。

Objective： To investigate the correlation between CT images and malignant grades of gastrointestinal stromal tumors （GIST） in stomach. Methods：Twenty-one cases of GIST in stomach confirmed by operation and pathology were retrospectively analyzed. The relationship between the size of the lesion and the necrotic lesion and malignant grades of GIST were determined. Results： There were 3 cases of high grade malignancy in the patients under 40 years old, accounting for 14% of the total cases and 60% of the cases under 40 years old. The malignant grade was lower when the maximum diameter of tumor 〈30 mm, whereas it was higher when the maximum diameter of tumor〉 50 ram. The malignant grade of tumor without necrotic lesions was lower, whereas the malignant grade of tumor with necrotic lesions was higher. The images of the maximum diameter of tumor 〈30 mm without necrotic lesions could be identified as low malignant grade. Conclusion：The relationship between the identification of malignant grades of GIST and ＂age＂ and ＂gender＂ is not significant. The malignant grades of GIST are closely related to the ＂size＂ and ＂degree of necrosis＂.