超声对胃肠道间质瘤的诊断及危险度评估的临床价值

回顾性分析78例经手术病理证实的胃肠道间质瘤( GIST)超声表现，术后证实超声测量瘤体大小与手术病理测量结果之间差异无统计学意义；对GIST的声像图进行大小、形态、边界、内部有无坏死液化、血流情况、周围脏器有无浸润和转移等6个方面进行描述，根据Fletcher原则将GIST分为低危组和中高危组，除血流信号丰富程度与肿瘤侵袭危险性分级之间差异无统计学意义外，瘤体大小、形状规则情况、边界和瘤体内液化坏死等超声表现与肿瘤侵袭危险性之间均存在相关性( P<0．01)。饮水后GIST的定位准确率为84．85%，高于饮水前的定位准确率68．33%(P<0．01)。

Ultrasonography in the diagnosis of gastrointestinal stromal tumor and malignant rank

Ultrasonography features of 78 patients with pathologically confirmed gastrointestinal stromal tumors ( GIST) were analyzed retrospectively and compared to the malignant rank of the tumors. There was no statistical difference in diagnostic accuracy of tumor size assessment between ultrasonography and pathological examination. The size, contour, border, liquefactive necrosis were markedly correlated with the patholobiologic behavior of tumors(P<0. 01). The ultrasonography features of high-risk GIST:size, larger than 5 cm, irregular shape, poor-defined boundary. It could improve the sonographic diagnosis of gastrointestinal stromal tumor through drinking wa-ter. The positioning accuracy of GIST with fasting was significantly lower than that of after drinking water ( P <0. 01 ) .