摘要
目的 评价鞍区肿瘤的CT与MRI影像特征 ,探讨CT及MRI对该区肿瘤的诊断价值。方法 收集经手术与病理证实的鞍区肿瘤37例 ,其中颅咽管瘤10例、脑膜瘤7例、垂体瘤6例、脊索瘤5例、毛细胞型星形细胞瘤4例、表皮样囊肿3例、蛛网膜囊肿2例。全部病例均行CT与MRI检查 ,17例行CT平扫与增强检查 ,20例行MRI平扫与增强检查。结果 大部分肿瘤边界清楚 ,在CT图象上呈低、等密度或混杂密度 ,除表皮样囊肿、蛛网膜囊肿和垂体瘤外 ,其它肿瘤均显示形态不同的钙化。颅咽管瘤钙化大多呈环状、弧形或结节形 ,脑膜瘤钙化多呈砂粒状 ;脊索瘤钙化呈散在点、片状 ,伴有斜坡破坏呈碎屑样改变 ,毛细胞型星形细胞瘤钙化呈不规则形 ,大小不等。MRI检查 ,TIWI上肿瘤大多呈低、等信号或混杂信号 ,T2W1上呈均匀高信号或不均匀高低混杂信号。 结论 CT能准确显示肿瘤钙化和骨质破坏程度 ,MRI在显示病变范围方面优于CT。
Objective To analyze the CTand MRI features and their diagnostic value in sella regional tumor. Methods 37cases of regional tumor including craniopharyngioma(n=10),meningioma(n=7),pituitary adenoma(n=6),chordoma(n=5),astrocytoma(n=4),epidermoid cyst(n=3),and arachnoid cyst(n=2)proven surgically and pathologically were analyzed retrospectively.CTand MRI scan(17cases with post-contrast CT and20cases with post-contrast MRI scan additionally)were performed in all cases. Results Most of the tumors were well defined and showed hypodense or isodens or mixed dense in CTimages.Except that epidermoid cyst,arachnoid cyst and pituitary adenoma,tumors showed various calcified shape:The calcification of craniopharyngioma showed circular,curvilinear or nodular;the calcification of meningioma showed mottling;the calcification of chordoma showed scattered punctate or patchy,and the clivus destructed demonstrated residual fracture chip;the calcification of astrocytoma showed irregular shape and various size.MRI images showed hypointensity or isointensity or heterogeneous intensity in T 1 WI,images showed homogeneous hyperintensity or hetˉerogeneous intensity in T 2 W 1 . Conclusion CTcan showbone destruction and calcification of tumor clearly.MRI is superior to CTin demonstrating the dimension of the tumors.Both of them are useful in diagnosis of sella regional tumors.
出处
《浙江临床医学》
2004年第1期5-6,共2页
Zhejiang Clinical Medical Journal
