摘要
目的:分析28例胃肠道间质瘤(GIST)的CT表现特点,探讨CT对该肿瘤的诊断价值。材料和方法:搜集经手术病理证实的胃肠道间质瘤28例做回顾性分析,全部病例均行螺旋CT平扫和双期增强扫描。结果:肿瘤发生于胃部12例,小肠10例,结肠2例,直肠2例,食管1例,肠系膜1例。28例GIST中,恶性22例,主要CT表现为:肿块直径≥5cm17例,20例瘤体内有低密度坏死,肿瘤边缘有分叶7例,肿瘤实体明显强化,增强前后净增加CT值≥40Hu18例,15例瘤体内和瘤旁伴有成簇状或线状排列血管,周围组织侵犯或远处转移12例。良性6例,肿块直径≤5cm,边界清楚,密度均匀,呈轻度均匀性强化。CT检查的敏感性为100%,定位准确率为67.8%(19/28),定性准确率78.57%(22/28)。结论:CT可作为GIST常规检查方法,其敏感性高,对术前定性诊断有帮助。但对体积较大的GIST,确定肿瘤组织来源较困难,需结合钡餐造影和内镜检查,以提高定位准确率。
Purpose： To analyze CT features of gastrointetinal stromal tumor（GiSTs） and to evalate the value of CT diagnosis. Materials and Methods： CT features of twenty - eight patients with GIST proved by surgery and pathology were retrospectively analyzed, Plain and bi - phasic enhanced CT were performed in all 28 cases. Results： of the 28 cases, 12 lesions were located stomach, 10 in small bowel, 2 in colon, 2 in rectum, 1 in esophagus and 1 in mesentery.The CT features of malignant GISTs（22 cases） were inclding： Diameter of the mass ≥ 5cm（n = 17）, Low density necrosit within the lesions（n = 20）, lobular in shape （n = 7）, extensive enhancement with the CT attenuation elevated ≥ 40 HU after contrast - injected（n = 18） clustered of linear small vessels intra- tumors and para-tumors（n = 15）, invasion or metastasis of adjacent strutures（n = 12） . The begin GISTs（6 cases） were less than 5 cm in diameter , with clear configuration, homogenous density and slight enhancement. The sensitivity, accuracy for location and quality of CT were 100%, 67.8% （19/28）and 78.57% （22/28） respectively.Conclusion： CT is the common and effective modality in diagnosing gastrointestinal stromal tumors, but it is difficult to definite the origin of tumor when the tumor is larger. Combining with barium exam or endoscopic ultrasonography, it will increase the accuate rate.
出处
《中国医学计算机成像杂志》
CSCD
2006年第1期36-39,共4页
Chinese Computed Medical Imaging
关键词
胃肠道
间质瘤
CT
Gastrointestinal tract Stromal tumor CT
