Кimmerle anomaly is a variant of the first cervical vertebra, which is an additional bone arch extending from the posterolateral part of the lateral mass of the atlas, above the groove of the vertebral artery to the posterior arch, as well as ossification of a part of the atlanto-occipital ligament. The calcified ligaments form a partial or complete bony arch, which is variously called " foramen arcuale», "ponticulus posticus» or «Kimmerle anomaly». The analysis of domestic and foreign literature sources showed that at present the incidence and clinical manifestations in patients with Kimmerle anomaly have not been sufficiently studied and require further study.
