【摘要】 本文报告２３例脑干肿瘤，均经ＭＲＩ检查和手术、病理证实。脑干肿瘤可分为延髓、桥脑和中脑肿瘤；按生长方向不同，各部位肿瘤又各分为若干个亚型。ＭＲＩ诊断脑干肿瘤，具有精确、安全、无痛苦，能直观显示肿瘤的部位和三维成像等优点，对定性诊断和确定手术入路有极大帮助。诊断脑干肿瘤时，需注意与桥小脑角肿瘤、小脑蚓部肿瘤、胃炎、脑干脑炎和脑干内血肿等鉴别。更多还原

【Abstract】 his paper reports 23 cases with brainstem tumor,which were diagnosed by MRIand verified by observations during operation and pathologic examination.Brainstem tumors can be divided into medulla oblongata tumor,pons tunior and midbrain tumor,eact of them may be subdivided into several subgroups according to different directionof tumor growth.For diagnosing brainstem tumor,MRI have such advantages as safety,painlessness,truthful visualization,accurate locating of tumor and formation of three-dimensional image,etc,and is extremely helpful to diagnose the nature of tumor andto select the surgical approach.The authors consider that brainstem tumors need to bedifferentiated from cerebellopontine angle tumors,cerebellar vermis tumors, gastritis’brainstem encephalitis,intrabrainstem hematoma and so o更多还原