Background and objectives Morphological variations (MV) in the course of the internal carotid artery (ICA) are commonly identified. Their prevalence and relationship with ischemic stroke (IS) remain unclear. The present study attempted to estimate the prevalence and pattern of MV of ICA among Egyptian patients and to detect whether these MV associated with increased risk of IS or not. Methods Out of the recruited 550 acute ischemic stroke patients, 102 met the inclusion and exclusion criteria and were included in our study. Each patient was subjected to detailed history including risk factors and clinical assessment using the National Institute of Health Stroke Scale, mRS, and extracranial duplex ultrasound (US) assessment. Results Eleven patients out of 102 (10.8%) showed MV in their ICA course, 6 of them were women and 5 were men. These MV were unilateral in 90.9% (10/11) of cases and more in the left ICA (72.7%), while one case (9.1%) showed MV of both ICA. The commonest pattern of MV was tortuosity in 7 cases (63.6%) and kinking in 4 cases (36.4%). The history of previous IS and TIA was recorded in 9.1% of patients with MV in ICA for each group, while the history of IS was recorded in 13.2% of patients without MV and TIA in 4.3% patients without MV in ICA. There were no statistically significant differences between both groups. Conclusion The prevalence of MV in the present study is 10.8%. MV are more frequent in women and older patients and are not associated with an increased risk of ischemic stroke.

中文翻译：

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颈内动脉形态变异的患病率及其与脑血管缺血性卒中的关联（基于医院的研究）

背景和目的 颈内动脉 (ICA) 过程中的形态变异 (MV) 通常被识别。它们的患病率和与缺血性卒中 (IS) 的关系仍不清楚。本研究试图估计埃及患者 ICA MV 的患病率和模式，并检测这些 MV 是否与 IS 风险增加有关。方法 在招募的 550 名急性缺血性脑卒中患者中，102 名符合纳入和排除标准并被纳入我们的研究。每位患者都接受了详细的病史，包括风险因素和使用美国国立卫生研究院卒中量表、mRS 和颅外双工超声 (US) 评估的临床评估。结果 102例患者中有11例（10.8%）在ICA病程中出现MV，其中女性6例，男性5例。这些 MV 在 90.9% (10/11) 的病例中是单侧的，在左侧 ICA (72.7%) 中更多，而一个病例 (9.1%) 显示两个 ICA 的 MV。MV 最常见的模式是 7 例（63.6%）的曲折和 4 例（36.4%）的扭结。每组 ICA 中 9.1% 的 MV 患者记录了既往 IS 和 TIA 病史，而 ICA 中 13.2% 的无 MV 和 TIA 的无 MV 患者记录了 IS 病史。两组之间没有统计学上的显着差异。结论 本研究中 MV 的患病率为 10.8%。MV 在女性和老年患者中更常见，并且与增加的缺血性中风风险无关。6%) 和扭结 4 例 (36.4%)。每组 ICA 中 9.1% 的 MV 患者记录了既往 IS 和 TIA 病史，而 ICA 中 13.2% 的无 MV 和 TIA 的无 MV 患者记录了 IS 病史。两组之间没有统计学上的显着差异。结论 本研究中 MV 的患病率为 10.8%。MV 在女性和老年患者中更常见，并且与增加的缺血性中风风险无关。6%) 和扭结 4 例 (36.4%)。每组 ICA 中 9.1% 的 MV 患者记录了既往 IS 和 TIA 病史，而 ICA 中 13.2% 的无 MV 和 TIA 的无 MV 患者记录了 IS 病史。两组之间没有统计学上的显着差异。结论 本研究中 MV 的患病率为 10.8%。MV 在女性和老年患者中更常见，并且与增加的缺血性中风风险无关。结论 本研究中 MV 的患病率为 10.8%。MV 在女性和老年患者中更常见，并且与增加的缺血性中风风险无关。结论 本研究中 MV 的患病率为 10.8%。MV 在女性和老年患者中更常见，并且与增加的缺血性中风风险无关。