摘要
目的 分析腹部神经鞘瘤的CT表现 ,提高其诊断及鉴别能力。资料与方法 回顾分析腹部神经鞘瘤 18例 ,其中腹腔 3例 ,腹膜后 14例 ,右肾 1例。良性 7例 ,恶性 11例。 18例均行平扫 ,13例加做增强扫描 ,1例行MRI检查。观察肿瘤的CT表现 ,并与手术病理对照。结果 肿瘤均表现为均匀或混杂密度肿块 ,16例形态规则。 6例良性有完整包膜 ,平均最大径 (79.9± 5 0 .3)mm ;10例恶性包膜不完整或粘连 ,最大径 (10 5 .4± 37.3)mm ,2例骶骨前缘骨质吸收、破坏。根据密度及均匀度分为 :(1) 6例均匀等密度或低密度 ,无明显囊变 ;(2 ) 6例较大不规则囊变或散在多个囊变 ;(3) 3例较大囊变 ,居中 ;(4 ) 2例周边部分密度较低 (融冰征 )。恶性占各类型例数分别为 2 / 6 ,5 / 6 ,3/ 3和 1/ 2例。 1例肾内病变呈混杂密度。结论 腹部神经鞘瘤表现为有包膜肿块 ,均匀等密度或低密度 ,伴不同形态囊变区。根据其影像特征可提示诊断 ;
Objective To analyze CT manifestations of abdominal neurilemoma, to improve the diagnosis and differentiation of the disease.Materials and Methods Eighteen cases of abdominal neurilemoma were enrolled in this study, which were located in abdominal cavity (n=3), retroperitoneal space (n=14) or right kidney (n=1). The patients included 12 males and 6 females, with a mean age of 41.3 years. Plain CT scanning was performed in all 18 cases, and additional enhanced CT scanning in 13 and MRI in one case. CT findings were compared with pathological results.Results Benign lesion was seen in 7, while malignant lesion in 11 cases. The lesion was presented as a mass with homogeneous or mixed density. The mass showed regular shape in 16 cases and had intact capsule in 6 cases. The mean maximum diameter of the benign and malignant lesions was (79.9± 50.3) mm and (105.4±37.3) mm, respectively. Ten malignant lesions showed incomplete or adhered capsule. Based on the density and homogeneity, the lesions can be divided into (1) homogeneous iso- or hypo-density (n=6); (2) large irregular or multiple small cystic degeneration (n=6); (3) large cystic degeneration (n=3); (4) low density at the peripheral zone, so-called “melting ice” sign (n=2). Conclusion Large encapsulated mass with homogeneous iso- or hypo-density and cystic degeneration are the main CT findings of neurilemoma. Based on the imaging features correct diagnosis can be established, although the differentiation of benign with malignant should be based on the clinical and pathological information.
出处
《临床放射学杂志》
CSCD
北大核心
2004年第5期409-412,共4页
Journal of Clinical Radiology
关键词
腹部神经鞘瘤
CT表现
诊断
MRI
Neurilemoma Neoplasm, abdominal Tomography, X-ray computed
