BACKGROUND Intraventricular silicone oil is a relatively rare complication resulted from silicone oil tamponade to treat retinal detachment. It is occasionally reported in previous literature. To the best of our knowledge, the long-term longitudinal comparisons of silicone oil both in the brain and in the postoperative eyeball based on CT/MRI were lacking, and intraventricular silicone oil accumulation beside lesions has been reported rarely. CASE PRESENTATION A 63-year-old male patient underwent an intraocular tamponade with silicone oil in June 2009. Eight CT examinations and 2 MRI examinations were acquired between 2011 and 2018.The changes of silicone oil in the brain in CT/MRI as below: Silicone oil initially migration to bilateral lateral ventricular anterior horn was found in November 2011, it was aslo found at right side of suprasellar cisterna, and there was no change in location 6 h later; Silicone oil at the anterior horn of right lateral ventricle disappeared but remained at left lateral ventricle and right side of suprasellar cisterna in July 2014, and there was no change in location in a short-term reexamination. It was found at the middle of left lateral ventricle (adjacent to the real cause) in march 2018, but disappeared 3 months later, while remained at anterior horn of left lateral ventricular and right side of suprasellar cisterna all the time. There was no change in location in the next 2 follow-up (September and October in 2018). The CT values of silicone oil distributed throughout the brain were dynamically changed with time. CONCLUSION It is important to recognize intraventricular silicone oil in a particular location.More important is to discover "the real murderer", which is the main cause of symptoms in the vicinity of special location. Moreover, the migration of silicone oil between eyeball and brain may not be always in a single direction.

中文翻译：

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注意眼内压塞后脑室内硅油的特殊位置-基于CT / MRI的10年随访病例报告。

背景技术脑室内硅油是由硅油填塞剂治疗视网膜脱离而引起的相对罕见的并发症。在以前的文献中偶尔有报道。据我们所知，缺乏基于CT / MRI的大脑和术后眼球中硅油的长期纵向比较，而且很少报道病灶旁脑室内硅油的积聚。病例介绍一名63岁的男性患者于2009年6月接受了眼内填塞含硅油的填塞术。2011年至2018年进行了八次CT检查和2例MRI检查。硅油最初于2011年11月发现迁移至双侧侧室前角，在上层水槽的右侧也发现了它，并且在6小时后位置没有变化。2014年7月，右心室前角的硅油消失，但仍保留在左心室和鞍上池的右侧，短期复查的位置没有变化。它于2018年3月在左心室中部（与真正原因相邻）被发现，但在3个月后消失，而一直保留在左心室前角和鞍上池的右侧。在接下来的2次随访中（2018年9月和10月），位置没有变化。分布在整个大脑中的硅油的CT值随时间动态变化。结论识别特定位置的脑室内硅油很重要。更重要的是发现“真正的凶手”，这是特定位置附近症状的主要原因。此外，硅油在眼球和大脑之间的迁移可能并不总是朝一个方向。