The meningioma originated from the sellar diaphragm can extend toward intrasellar or suprasellar space. That can be misdiagnosed as pituitary adenoma by the CT and MRI. Microsurgical removal of the tumor totally is the treatment of choise.

• 鞍隔脑膜瘤为发生于鞍膈及其附近的肿瘤,肿瘤可向鞍内或鞍上生长,其临床表现为进行性视力下降,而内分泌功能障碍却很少见,计算机体层摄影(CT)及磁共振成像(MRI)检查见鞍内及鞍上有肿块阴影,易误诊为垂体腺瘤,显微外科治疗有益于肿瘤全切除。