颅内少枝胶质细胞瘤CT特征性表现分析（附75例少枝胶质细胞瘤与81例星形细胞瘤CT表现的相互对照）

Analysis of CT Features of Intracranial Oligodendroglioma: A Comparison between 75 Cases of Oligodendroglioma and 81 Cases of Astrocytoma

目的：了解颅内少枝胶质细胞瘤的ＣＴ特征性表现。材料与方法：对７５例经病理证实的颅内少枝胶质细胞瘤的ＣＴ表现进行回顾性分析，并与８１例病理证实的星形细胞瘤相互对照。结果：提出了少枝胶质细胞瘤这一少见类型胶质瘤在ＣＴ上的相对特征性表现：（１）条索状或团块状钙化（６６．６％）；（２）等或稍高密度肿块（６０．０％）；（３）无或轻度强化（７７．３％）；（４）肿瘤周围无或轻度水肿（７７．３％）；（５）好发于大脑的周边部位且侵蚀颅骨（１３．４％），其中钙化为最具特征性表现。结论：根据这些相对特征性表现的综合。

Objective: To study the CT features of intracranial oligodendroglioma. Materials and Methods:The CT finding of 75 pathologically proven oligodendrogliomas were retrospectively analysed and compared with those of 81 pathologically proven astrocytomas. Results: To suggest that there are many relative CT features in oligodendrogliomas as a rare type of gliomas: (1) stripe and/or clump shaped calcification (66.7%); (2) isodense or slightly high dense mass (60.0%); (3) little or no contrast enhancement (77.3%); (4) little or no peritumoral edema (77.3%) and (5) peripheral involuement of cerebral white matter with skull erosion (13.4%), the calcification in all of features is the most characteristic.Conclusion: Based on a combination of these relative CT features, CT can allow prediction of the diagnosis of oligodendroglioma in most cases.