胃肠间质瘤MSCT三期扫描的CT诊断价值

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。结幂肿瘤发生于胃11例，空肠4例，回肠3例，肠系膜2例，食道1例。21例中，艮性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。

Diagnostic value of dynamic three-phase MSCT in gastrointestinal stromal tumors

Objective To analyze the diagnostic value of multi-slice spiral CT on gastrointestinal stromal tumors (GISTs). 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=1). Of these, 3 cases were benign, 4 cases were conjunctional and 14 cases were malignant. The lesions were oval or irregular in shape. The tumo...