Ponticulus posticus

Last edit by Alaric Steinmetz on

Synonyms: Arcuate foramen, Kimmerle's anomaly

The term ponticulus posticus refers to an anatomical variant where a narrow bony bridge covers the atlas the groove for the vertebral artery.

Epidemiology

A ponticulus posticus is a common anatomical variant, found in approximately 3-15% of the population[^1] [^2] [^3].

Imaging

Ponticulus posticus
Lateral X-ray image of a patient with a ponticulus posticus. Image adapted from commons.wikimedia.org under the CC BY-SA 3.0 license.