[The frequency of vertebral artery sulcus ossification, grades III and IV, in patients with Kimmerle's anomaly: A systematic review and meta-analysis].

Objective: To conduct a systematic review and meta-analysis to determine the frequency of Kimmerle's anomaly (KA) in patients with grades III and IV vertebral artery (VA) sulcus ossification.

Material And Methods: We searched the PubMed and eLIBRARY.RU databases, identified 68 articles in English, and obtained data of 29.