摘要
目的：探讨胃间质瘤的CT和MRI的表现，以提高诊断正确率。材料和方法：回顾性分析13例经病理学及免疫组化证实的胃间质细胞瘤患者的临床资料和CT、MRI表现。13例均行CT平扫和增强扫描，其中4例行MRI平扫和增强扫描。结果：肿瘤均为单发，腔内型3例，腔外型6例，哑铃型4例，圆形或类圆形9例，分叶形4例，直径3．0—10．4cm，平均7．5cm。CT平扫示肿瘤呈均匀等密度3例，肿块周边呈等密度，中间呈略低密度或低密度9例，呈高、低、等混杂密度1例。增强扫描示3例呈中度明显增强，10例中度不均匀增强，以静脉期明显。MRI平扫示1例肿块信号均匀，3例肿块信号不均匀，增强扫描肿块信号均匀或不均匀增强。病理检查10例恶性，3例良性。结论：胃间质瘤CT、MRI具有一定的特征性表现，对诊断有一定的价值，但不能定性，确诊需要依靠电镜检查和免疫组化。
Purpose ： To evaluate CT and MRI features of gastric stromal tumor and improve its diagnostic accuracy. Materials and Methods： Clinical data and CT, MRI findings were analyzed retrospectively in 13 cases with pathological and immunohistoche mical comfirmation. Non-contrast and contrast CT scan were done in all cases . Non-enhaned and enhaned MRI were performed in 4 cases. Results： All the tumors were solitary lesion, and intraluminal pattern （ n = 3 ）, exophytic pattern （ n = 6 ）, dumbbell pattern （ n = 4 ）. Round mass was found in 9 cases,while the mass was lobulated in 4 cases. The tumoral size was 3.0 ～ 10.4cm,7.5cm in average. On plain CT scans,the tumors showed homogeneous isodensity（ n = 3 ）, or low-density centrally with isodensity peripherally（ n = 9）, or mixed density（ n = 1 ）. On enhanced CT scans,moderate or marked enhancement was seen in 3 cases, moderate and inhomogenous enhancement was seen in 10 cases, which was best visualized in venous phase. On MRI one case presented homogeneous signal intensity, 3 cases presented inhomogeneous signal intensity, and homogeneous or inhomogeneous enhancement. 10 cases were malignant and 3 cases was benign. Conclusion： Gastric stromal tumor has special CT and MRI features which may play a role in the correct dianosis, but that is not comfirmatory, the final diagnosis is provided only by electron microscopic examination and immunohistoche mical comfirmation.
出处
《中国医学影像学杂志》
CSCD
2006年第5期336-340,共5页
Chinese Journal of Medical Imaging
关键词
胃
间质瘤
CT
MRI
stomach
stromal tumor
CT
MRI
