The spontaneous occlusion of brain arteriovenous malformations (bAVMs) is a rare event, particularly for unruptured ones. Associated factors include single-venous drainage and small nidus size. Most of the previously reported cases were ruptured bAVMs. We report the case of a middle-aged male patient with an unruptured, rolandic, left-sided bAVM associated with a 30-year history of refractory epilepsy. We documented the spontaneous thrombosis of the venous drainage of the AVM without any sign of bleeding. Finally, we underline the difference between ruptured-induced occlusion and truly spontaneous thrombosis of the bAVMs.

中文翻译：

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自发性脑动静脉畸形闭塞一例：影像学分析与临床争论

脑动静脉畸形（bAVM）的自发闭塞是一种罕见的事件，特别是对于未破裂的动静脉畸形。相关因素包括单静脉引流和病灶尺寸小。之前报道的大多数病例都是脑动静脉畸形破裂。我们报告了一名中年男性患者的病例，该患者患有未破裂的左侧脑动静脉畸形，并有 30 年难治性癫痫病史。我们记录了 AVM 静脉引流的自发血栓形成，没有任何出血迹象。最后，我们强调了 bAVM 破裂引起的闭塞和真正的自发血栓形成之间的区别。