经腹超声和MSCT对胃肠间质瘤诊断价值的比较研究

Contrastive study of diagnostic value of transabdominal ultrasound and gemstone CT in gastrointestinal stromal tumors

目的：探讨经腹超声和MSCT对胃肠道间质瘤（gastrointestinal stromal tumor,GIST）的诊断价值。方法 ：收集经内镜活检、手术和病理证实的GIST患者31例,回顾性分析其超声和CT资料。结果：本组均为单发,病变位于胃部18例,小肠10例,结肠3例;极低危险度5例,低危险度7例,中危险度5例,高危险度14例。极低危险度者病变直径0.6-2.6 cm,低危险度者1.6-5.5 cm,中危险度者4.6-10.7 cm,高危险度者8.8-13.7 cm。31例GIST,超声检出30例,检出率96.8%,肿瘤位置与内镜和术中所见相符26例（86.7%）;CT检出26例,检出率83.9%,肿瘤位置与内镜和术中所见相符25例（96.2%,25/26）。结论：经腹超声对GIST的检出率高于MSCT,有利于对胃部小间质瘤（〈1.5 cm）的检出,CT定位诊断符合率高于超声,经腹超声和CT结合有助于GIST的检出和定位诊断。

Objective：To explore the diagnostic value of transabdominal ultrasound and the multi-slice spiral CT （MSCT） in gastrointestinal stromal tumor （GIST）. Methods：The outcome of ultrasound and gemstone CT of 31 cases of primary GIST confirmed by endoscopy,operation and pathology were retrospectively analyzed. Results：All GIST cases were single lesion. In the total 31 patients,18 originated from stomach,10 from small intestine,3 from colon.5 patients belonged to very low risk group,7 to low risk,5 to moderate risk,14 to high risk.In very low and low risk groups,tumor diameter was 0.6-7.6 cm; in moderate risk,tumor diameter 3.6-10.7 cm; in high risk,tumor diameter 8.8-13.7 cm. 30 of 31 cases GIST were found by US （96.8%）, and the location accuracy rate was 86.7%. 26 of 31 cases GIST were found by CT （83.9%） and the location accuracy rate was 96.2%. Conclusions：Transabdominal ultrasound is higher than MSCT in GIST finding and CT is higher than transabdominal ultrasound in GIST location. US is beneficial to smaller GIST （〈1.5 cm） found in stomach. The combination of US and CT is helpful to GIST detection and location.