岩尖疝并发空蝶鞍的MRI和CT表现及可能的发生机制

发布时间：2018-01-24 04:10

本文关键词： 岩尖疝空蝶鞍磁共振成像　出处：《临床放射学杂志》2015年02期 　论文类型：期刊论文

【摘要】：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。
[Abstract]:Objective to investigate the MRI and CT findings and the possible mechanism of MRI and CT in 13 patients with petrous apex hernia complicated with empty Sella. Methods the MRI and CT findings of 13 patients with petrous apex hernia were analyzed retrospectively and the maximum transverse diameter of the lesions was evaluated. Signal or density, the relationship between signal or density and the apical and Meckel cavities, and whether or not empty Sella were involved. Results all 13 cases were associated with different degrees of sclerostomy. 5 cases were unilateral petroclival hernia. The other 8 cases were bilateral, of which 5 cases had asymmetric lesions and one side was larger. All lesions occurred in the lateral wall of the Meckel cavity, connected to the Meckel cavity, and involved the petrosal tip, resulting in the enlargement and deformation of the petrosal apex. The signal intensity in the lesion was consistent with that of cerebrospinal fluid (CSF). On T1WI and T2-flair, hypointensity and hyperintensity on T2WI were observed. Ct findings showed that the boundary was clear and the density of the lesion was consistent with that of cerebrospinal fluid. Conclusion the petroclival hernia and empty Sella have similar pathological basis. It is mainly caused by subarachnoid herniation into the petrous apex or Sella turcica, which suggests that the pressure balance of intracranial cerebrospinal fluid is unstable.
【作者单位】：广东省医学科学院广东省人民医院放射科;
【分类号】：R741;R445.1;R816.1
【正文快照】： 岩尖疝(petrous apex cephalocele,PAC)是指蛛网膜下腔通过Meckel腔后外侧壁疝入岩尖,其中为脑脊液填充,使岩尖扩大变形[1]。大部分PAC患者无明显临床症状,多为偶然发现[1],仅有少部分患者可因为三叉神经受压而引起三叉神经痛或脑脊液漏,部分症状严重者则需进一步外科手术治疗

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