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目的 评估蝶枕软骨结合发育的高分辨率CT扫描所见。方法 分析年龄 3月～ 74岁的 2 69例蝶枕软骨结合高分辨率CT扫描所见 ,观察蝶枕软骨结合形态 ,骨化中心出现的时间、位置 ,蝶枕融合及其残迹和蝶窦的发育。结果 蝶枕软骨结合分未闭、部分闭合、完全闭合三类。 83例未闭的蝶枕软骨结合形状多样 ,5 7例可见切迹。软骨结合宽度的均数为 1.8mm ,与年龄呈负相关 (r =-0 .92 ,P <0 .0 0 1)。骨化中心出现的年龄 9～ 16岁 ,可分别位于软骨结合的上、中、下部或全长的中线处 ,其长度的均数为4.73mm ,密度类似骨皮质。部分闭合见于 11～ 16岁 ,完全闭合最早见于 14岁 ,17岁后完全闭合。蝶枕软骨结合骨化中心出现及其闭合年龄 ,女性较男性早 1～ 2岁。蝶窦最早见于 1岁。蝶枕软骨结合完全闭合的 186例中 ,可见不规则白线残迹的 91例 ,其中 13例蝶窦超越部分白线累及枕骨 ;蝶窦局限于蝶骨内的 96例 ,气化良好累及枕骨的 90例。结论 高分辨率CT能清晰显示蝶枕软骨结合的骨化过程 ,有助于颅底疾病的诊断及经蝶窦手术入路的选择
Objective To evaluate the findings of high-resolution CT scans of the sphenoid cartilage. Methods Totally 269 patients with spondylolisthesis combined with high-resolution CT scan from March to 74 years of age were analyzed. The morphology of spondylolisthesis, the time and location of ossification center, development. Results Septal cartilage with sub-part closed, partially closed, completely closed three categories. In 83 cases, the shape of the combined sessile vertebral cartilage was diverse, and the notch was found in 57 cases. The mean cartilage binding width was 1.8 mm, which was negatively correlated with age (r = -0.92, P <0.001). Ossification occurs at the age of 9 to 16 years old, respectively, located in the cartilage in the upper, middle and lower part or full-length at the midline, the average length of 4.73mm, density similar to the cortical bone. Partially closed at 11 to 16 years old, completely closed first seen at 14 years old, completely closed after 17 years of age. Occipital cartilage combined with ossification center and closing age, women than men as early as 1 to 2 years old. Sphenoid sinus first seen at 1 year old. Seventy-six cases with sphenochondral cartilage combined completely closed showed 91 cases of irregular white line remnant. Thirteen cases of sphenoid sinus involved the occipital bone in part of the white line; the sphenoid sinus was confined to 96 cases in the sphenoid bone, 90 cases. Conclusion High-resolution CT can clearly show the ossification process of the sphenoidoccipital cartilage, which is helpful for the diagnosis of skull base diseases and the choice of transnasal surgery