摘要
目的分析胃肠间质瘤的多层CT(MSCT)征象,探讨MSCT的诊断价值。方法回顾性分析21例经手术病理证实胃肠间质瘤的三期MSCT征象。结果肿瘤发生于胃11例,空肠4例,回肠3例,肠系膜2例,食道1例。21例中,良性3例,交界性4例,恶性14例。肿瘤呈类圆形或不规则形,密度均匀实性者4例,不均匀实性者9例,囊实性混合者8例,有1例钙化灶。良性胃肠间质瘤体积较小,密度均匀,肿瘤坏死及囊变少见,病灶边缘光整。恶性度较高的胃肠间质瘤CT表现为:肿块相对较大,密度不均,肿瘤中央坏死及囊变多见;肿瘤边缘多不光整,可呈分叶状。增强扫描表现为肿块实性部份动脉期、门脉期明显强化,平衡期强化无减退。转移病灶与原发灶的CT表现相似。结论MSCT三期检查能够反映肿瘤强化特点,CT检查有助于胃肠道间质瘤的准确定位,以及观察肿瘤与周围组织结构关系情况。
Objective To analyze the gastrointestinal stromal tumors （GISTs）. diagnostic value of multi-slice spiral CT on Methods Retrospectively analyzed both of the plain and three-phase dynamic enhanced CT features in 21 cases with whom were proved by pathology. Results The tumors originated from the stomach （n= 11）, jejunum （n=4）, ileum （n=3）, mesentery （n=2）, esophagus （n=l）. Of these, 3 cases were benign, 4 cases were conjunctional and 14 cases were malignant. The lesions were oval or irregular in shape. The tumors appeared as homogeneous dense solid （4 cases）, heterogeneous dense solid （9 cases）, cystic-solid mixed （8 cases）, one case calcification. Benign GISTs mainly appeared as small size, equable density, smoothing border lines, while malignant GISTs mainly qualified as large size, heterogeneous density, necrosis and cystic changes in the center; smoothly and lobulated border lines. The solid portion of tumors showed marked enhancement in the arterial and portal venous phase and in the equilibrium phase. The CT imaging of metastasis were similar as primary tumors. Conclusion Three- phase spiral CT examination can demonstrate important features of GISTs, CT study is helpful for locating the tumor and observation of relationship of the tumor and surrounding structures.
出处
《中国CT和MRI杂志》
2009年第4期48-50,共3页
Chinese Journal of CT and MRI
关键词
胃肠间质瘤
体层摄影术
X线计算机
三期增强扫描
gastrointestinal stromal tumor
tomography
X-ray computed
three-dy namic enhanced scanning
