摘要
目的 :探讨几种垂体囊性病变的影像学特点 ,提高术前影像诊断水平。方法 :30例经手术及病理证实的垂体囊性病灶 ,病理类型 :垂体微腺瘤囊变、垂体大腺瘤伴囊变、垂体脓肿、Rathke裂隙囊肿。 30例均行CT平扫及增强扫描。2 1例行MR平扫及增强。结果 :垂体大腺瘤囊变是最常见的垂体囊性占位 ,其囊变常位于垂体上部 ,若囊变较完全时 ,应用MR矢状位扫描能较好的观察病灶全貌 ,及囊壁后下部的残余瘤体。囊内液 液平面是垂体大腺瘤囊变出血较特征的改变。囊变的垂体腺瘤病理类型均为嫌色细胞型。垂体脓肿病灶密度变化较大 ,CT值 5～ 70HU ,病灶不强化是其特征。垂体脓肿与Rathke裂隙裂囊肿的鉴别点在病灶部位及与垂体的分界 ,前者累及垂体全部 ,后者位于前后叶之间 ,与垂体前后叶分界清楚。所有病灶均未见钙化。结论 :通过对重要征象的观察 ,能提高对垂体囊性病变术前影像诊断水平。
Objective:To investigate imaging characters of pituitary cystic lesions (PCL),and to improve CT and MRI diagnostic accuracy of PCL.Methods:30 cases with PCL confirmed by surgical operation and pathology were performed plain and enhanced CT scanning,and 21 of those patients added plain and enhanced MR imaging.The pathological morphology involved in cystic and hemorrhagic macroadenomas (n=10),cystic microadenomas (n=6),pituitary abscess (n=8) and Rathke′s cleft cysts(n=4).Results:Cystic and hemorrhagic macroadenomas were the most common cystic diseases of pituitary.The cyst was often found in the upper part of the lesion.Sagittal MR imaging could show clearly the whole contour of the lesion and residual tumor located in the posteroinferior part of the cystic wall.Fluid level in the cystic lesion was the feature of the cystic and hemorrhagic macroadenoma.Density of pituitary abscess varied from 5 to 70 HU and no enhancement was feature of the abscess.The differentioation between the pituitary abscess and Rathke′s cleft cyst was the location of the lesion and the borderline between the lesion and pituitary.The cleft cyst located between anterior lobe and pars distalis and the abscess involved the most part of pituitary.No calcification was seen in all PCL.Conclusion:CT and MRI diagnosis of cystic lesions of pituitary can be improved by observing its imaging features.
出处
《放射学实践》
2001年第4期250-252,共3页
Radiologic Practice
关键词
垂体囊性病变
磁共振成像
CT
诊断
Pituitary Cystic lesions Tomography,X ray computed Magnetic resonance imaging
