BACKGROUND Occipital nerve blocks are commonly used in the treatment of different types of refractory headaches. The procedure is considered safe, and serious complications have rarely been described. CASE PRESENTATION We report a serious complication of occipital nerve blockade secondary to the penetration of local anesthetic and non-steroidal anti-inflammatory drugs into the posterior fossa in a patient affected by type I Arnold Chiari malformation. CONCLUSIONS This case reminds that a proper injection technique is mandatory to avoid potentially severe complications when performing occipital nerve blocks.

中文翻译：

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枕神经阻滞后小脑综合征一例。

背景枕神经阻滞常用于治疗不同类型的顽固性头痛。该程序被认为是安全的，并且很少描述严重的并发症。病例介绍 我们报告了一名受 I 型 Arnold Chiari 畸形影响的患者的枕神经阻滞的严重并发症，继发于局麻药和非甾体抗炎药渗入后颅窝。结论 该病例提醒，在进行枕神经阻滞时，必须采用适当的注射技术以避免潜在的严重并发症。