松果体区及鞍区生殖细胞瘤MRI诊断

目的：分析松果体区及鞍区生殖细胞瘤的MRI影像特点及鉴别诊断。方法：回顾性分析经手术和病理证实的鞍区、松果体区生殖细胞瘤10例;男9例,女1例;年龄5~63岁（平均18.8岁）。全部病例均行MR平扫和增强扫描。结果：位于松果体区4例,其中1例累及第四脑室;鞍区6例。生殖细胞瘤临床表现缺乏特异性,MR上T1加权为等或略低信号;T2加权为均匀或不均匀等或高信号肿块,增强扫描呈均匀或不均匀强化。结论：生殖细胞瘤临床和影像表现缺乏特异性,MR I是最有效的影像学检查方法。

MRI DIAGNOSES OF GERMINOMA IN SELLAR AND CONARIAL REGIONS

Objective：To analyse MRI characteristics of germinoma in sellar and conarial region.Materias and Methods：Ten patients with germinoma proved by operation and pathology were retrospectively reviewed.All patients（9 males and 1 female,whose age ranged from 5 years to 65 years） were examined by routine T1-weigted,T2-weigted scanning an contrast enhancement scanning.Results：The lesions were located in sellar region in 6 cases;located in conarial region in 4 cases,and involved the 4th ventricle in 1 case.Germinoma was observed slightly hypointensity or iso-intensity signal on T1WI,and heterogeneously hyperintensity or iso-intensity signal on T2WI.Furthermore,the masses showed homogeneous or heterogeneous enhancement after contrast-enhancement scaning.Conclusions：Germinoma was short of specificity in the clinical expression and imaging feature.MRI is the optimum technique to detect germinoma in the brain.