【摘要】 目的　通过正常头颅CT图像 ,对枕内隆凸的发育、形态及其临床意义进行研究。方法　选择 30 0 0例正常颅脑CT图像 ,男女各 15 0 0例 ,分 9个年龄组 ,在骨窗上对枕内隆凸进行观察和测量。结果　枕内隆凸最早见于 4个月婴儿 ,随年龄增长而增高 ,枕内隆凸形态分为单峰型、平坦隆起型、梯型和不规则型 ,以单峰型最常见。枕大池蛛网膜囊肿时枕内隆凸可见大的孤形压迹。结论　正常人枕内隆凸高度差异大 ,形态多样 ,枕内隆凸大的弧形压迹是诊断枕大池蛛网膜囊肿的重要征象。更多还原

【Abstract】 Objective To study the development and shape of the occipital protuberance and its clinical significance with normal cranial CT scans.Methods 3000 cases of normal cranial CT images were selected.There were 1500 males and 1500 females,which were divided into nine age groups.The internal occipital protuberances were observed and measured on bone-window.Results The internal occipital protuberance was seen earlist at four-month-old-infant,and growth with age.The shape of the internal occipital protuberance was classified into four types:single-peak-type,plane-protusion-type,tropezoid-type and irregular-type.The single-peak-type was seen most commonly.Big semilunar depression of the internal occipital protuberance could be seen in patient with magna citern arachnoid cyst.Conclusion The height and shape of normal internal occipital protuberance have many diversities.Big semilunar depression of the internal protuberance is a important sign in diagnosis of magna cistern arachnoid cyst.更多还原