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目的探讨岩尖疝并发空蝶鞍的MRI和CT表现及可能的发生机制。方法回顾性分析13例岩尖疝患者的MRI和CT表现,主要评价病灶最大横径、信号或密度、与岩尖及Meckel腔的关系以及是否合并空蝶鞍。结果 13例均合并不同程度的空蝶鞍。5例为单侧岩尖疝;余8例为双侧,其中5例病灶不对称,一侧较大;病灶均发生在Meckel腔的外侧壁,与Meckel腔相连,累及岩尖,使岩尖扩大变形。病灶内信号与脑脊液信号一致,T1WI和T2-FLAIR上呈低信号,T2WI呈高信号;CT表现为边界清楚,病灶内密度与脑脊液密度一致。结论岩尖疝和空蝶鞍有相似的病理基础,主要是由蛛网膜下腔疝入岩尖或蝶鞍所致。岩尖疝与空蝶鞍伴随,提示颅内脑脊液压力平衡的不稳定。
Objective To investigate the MRI and CT findings of the rock herniated herniated sellae and its possible mechanism. Methods The MRI and CT findings of 13 patients with rock herniation were retrospectively analyzed. The maximum transverse diameter, signal or density of the lesion, the relationship with the petrous apex and the Meckel cavity were evaluated. Results All 13 cases were associated with varying degrees of empty sella. 5 cases of unilateral rock tip hernia; the remaining 8 cases were bilateral, of which 5 cases of asymmetric lesions, one side larger; lesions occurred in the Meckel cavity lateral wall, connected with the Meckel cavity, involving the rock tip, the rock tip Expand the deformation. Lesions within the signal and cerebrospinal fluid signals, T1WI and T2-FLAIR was low signal, T2WI was high signal; CT showed a clear boundary, lesion density and cerebrospinal fluid density. Conclusions Rock tip hernia and empty sella have similar pathological basis, mainly caused by subarachnoid hernia into petrous apex or sellae. Rock tip hernia associated with empty saddle, suggesting that intracranial cerebrospinal fluid pressure balance instability.