CT 检查对幕上星形细胞瘤良恶性的鉴别诊断(附80例分析)  

The Discussion of Differention Between Benign and Malignant Supratentorial Astroeytoma on CT Examination (Analysis of 80 cases)

作　　者：王延瑾[1] 李启权[1] 

机构地区：[1]暨南大学附院放射科

出　　处：《暨南大学学报（自然科学与医学版）》1990年第2期83-89,共7页Journal of Jinan University(Natural Science & Medicine Edition)

摘　　要：经手术、病理证实的80例幕上星形细胞瘤(Ⅰ、Ⅱ、Ⅲ、Ⅳ级分别为11、19、37、13例其中Ⅲ级中2例为多发)经统计学处理,其 CT 表现Ⅰ、Ⅱ级:1)轮廓光整,低密度或伴钙化;2)瘤周无水肿带;3)不增强或轻度单房薄壁环形或不整薄壁环形增强;4)增强后轮廓不明,边界不清,以病变不增强或轻度薄壁不整环形增强为特征。Ⅲ、Ⅳ级:1)边界不清,增强后转变为清楚,轮廓光整;2)增强前轮廓不明;3)重度增强;4)肿瘤壁厚薄不均,多房环形或单房环形增强。以增强前边界不清,增强后转变为清楚及重度壁厚薄不均多房环形增强为特征。关于肿瘤与非肿瘤组织之间的边界,经37例手术,病理与增强前后 CT 表现对照观察,认为肿瘤的边界肉眼所见与 CT 表现是不一致的。Eighty cases of supratentorial astrocytoma confirmed surgically and pathologically have been checked statistically,which include 11,19,37 and 13 cases of grade Ⅰ,Ⅱ,Ⅲ and Ⅳrespcctively.Among the cases of grade Ⅲ two are multiple,each with two lesions.In statistics it shows that on CT scanning grade Ⅰ and grade Ⅱ astrocytomas present:1) hypodense lesion with regular contour or with calcification,2) no hypodense edema sur-rounding the tumor,3) no enhancement or monocular thin wall ring-like enhancement of slight degree or incomplete thin wall ring-like enhancement and 4) contour unclear and margin invisible after enhancement.The lesion is characterized by no enhancing or slightly erihancing with incomplete thin wall ring.Grade Ⅲ and Ⅳ present:1) margin inunclear turned to be clear,regular and smooth after enhancing,2) unclear contour in NCT,3) gross enhancement and 4)uneven thickness of the tumor wall,multinocular or monocular ring-like enhancement.They are characterized by borderline unclear in NCT turned to be clear and multinocular ring-like gross enhancement with uneven thickniss of their ring walls.To study the borderline between the neoplasm itself and the surrounding non-neoplastic tis-sue,37 cases have been collected which operative and pathological examination records are available for correlation study with NCT and CECT findings.It is thought that the tumor margin seen with naked eye does not correspond with that in CT scanning.

关 键 词：星形细胞瘤 CT 诊断 

分 类 号：R730.264[医药卫生—肿瘤]