鞍区生殖细胞瘤的MR影像

MRI Findings of Germinomas in Sellar Region

目的 分析鞍区生殖细胞瘤的MR影像特点。方法 经手术及病理证实的鞍区生殖细胞瘤 38例 ,男 12例 ,女 2 6例 ,年龄 3～ 32岁。结果 根据位置不同将其分为三类 :I类 :肿瘤位于第三脑室内 ,包括从第三脑室底向上长入第三脑室 ,共 2 0例 ;II类 :仅位于第三脑室底 ,累及视交叉、漏斗、垂体柄、视神经和视束 ,共 15例 ;III类 :仅位于鞍内 ,共 3例。结论 MRI对I类和II类生殖细胞瘤的诊断有重要价值 ,MRI对III类不易作出诊断 ,必须结合临床。

Objective To study the MRI findings of germinomas in sellar region. Methods All cases were proved by operation and pathology. There were 12 males and 26 females. The patient age ranges 3～32 years. The main symptoms of all cases were diabetes insipidus, defective visiona and change of sexual charactor. Results Germinoma in sellar region were classified into 3 types according to its site: Type I was inside the third ventricle including those stemming from the bottom of the third ventricle, and 20 cases in all; Type II was only at the bottom of the third ventricle, and 15 cases in all. Type III was only in sella, and 3 cases in all. Conclusion MRI examination is of great value in diagnosis of type I and type II, bat MRI has difficulty in diagnosing type III. [