MRI在鞍区肿瘤诊断中的应用价值

目的:探讨MRI在鞍区肿瘤诊断中的价值。方法:40例经手术和病理证实的鞍区肿瘤病人,对其MRI表现进行回顾性分析。结果:垂体瘤20例,颅咽管瘤8例,脑膜瘤6例,MRI表现具有特征性,术前诊断正确率较高。脊索瘤2例,星形细胞瘤1例,生殖细胞瘤1例,嗅神经母细胞瘤和浆细胞瘤各1例,MRI表现缺乏典型征象,往往难以诊断,其中3例误诊。结论:MRI检查,尤其是三维成像技术(横轴位、矢状位、冠状位)可显示鞍区肿瘤的内部结构、生长方式、侵犯范围及其与周围血管的关系,对鞍区肿瘤定位、定性诊断有重要价值。

Application value of MRI in confirming sellar and parasellar tumors

Objective:To explore the value of magnetic resonance imaging(MRI)in confirming the patients with tumors in sellar and parasellar area.Methods:MRI signs of 40 patients by surgically and pathologically confirmed sellar and parasellar area tumors were analyzed retrospectively.Results:Pituitary adenomas(n=20),craniopharyngiomas(n=8)and meningiomas(n=6)had characteristic signs and most of them were confirmed by MRI.But chordoma(n=2),astrocytoma(n=1),germinoma(n=1),esthesioneuroblastoma(n=1)and plasma-cell myeloma(n=1)were solidary lesions in sellar and parasellar area without any diagnostic signs and 3 cases were misdiagnosed.Conclusion:MRI,three dimensional images(axial,sagittal and coronal)in particular,can demonstrate inner characteristic,growth manner,infiltrating extend of tumors and the relationship between tumor and peri-tumor vessels.MRI has great value in the diagnosis of the sellar and parasellar neoplasms.