本文报告一例眶顶板障内脑膜瘤,作者结合文献复习对异位脑膜瘤进行了讨论。性,40岁,主诉缓慢进行性左侧突眼10年。入院前一月头颅平片见左眼眶顶有羽毛状密度增高区.检查见左眼轻度突出(4mm)伴眼球向下移位。头颅平片及断层摄片示左眶顶羽毛状混浊区,并向前扩展达眶上缘,向后达前床突和蝶骨小翼,向内至筛骨—蝶骨平板。CT 扫描证实左额叶底部骨性肿瘤,注入造影剂后可显著增强。颈动脉造影示左大脑前动脉向上方移位,眼动脉向下移,伴有中度扩张,有些病理血管延伸至肿瘤该处。局部有均匀的肿瘤染色。选择性颈外动脉造影显示肿瘤染色更为明显,内颌动脉的筛动脉枝和脑膜中动脉的额枝供应。术前先作内颈动脉栓塞术,经额下硬膜外入路,完全切除肿瘤。眶板切除至足以使眼球突出完全回缩,将视神经管打开,以寻找可能存在的肿瘤 This article reports one case of a dome-shaped intramural meningioma. The authors discuss ectopic meningiomas in conjunction with literature review. Sex, 40, complained of a slow progression of left exophthalmos for 10 years. In the month before admission, the head of the skull showed a feather-like density increase in the left eye dome. The examination showed mild protrusion of the left eye (4 mm) with downward shift of the eyeball. Skull flat films and tomography films show the left dome-like feather-like haze, and extend forward to the upper edge of the fistula, reaching posteriorly to the anterior bed pedicle and sphenoid winglets, and inward to the ethmoid-sphenoidal plate. The CT scan confirmed the bone tumor at the bottom of the left frontal lobe, which was significantly enhanced after contrast agent injection. Carotid angiography showed that the left anterior cerebral artery was displaced upwards, and the ophthalmic artery was moved downwards with moderate dilation. Some pathological vessels extended to the tumor site. Locally uniform tumor staining. Selective external carotid artery angiography showed that the tumor staining was more obvious, and the frontal branch of the medial artery and the middle meningeal artery was supplied. Internal carotid artery embolization was performed before surgery, and the tumor was completely resected through the subfrontal epidural approach. The tarsal plate is cut enough to completely retract the eyeball, and the optic canal is opened to find possible tumors