Citation, DOI & article data
The third condyle, also known as condylus tertius or median occipital condyle, is a rare anatomic variant of the occipital condyles. It is a small separate ossicle at the anteromedial margin of the occipital condyle formed by the failure of the embryonic proatlas (4th occipital sclerotome) to unite with the condyle proper.
The third condyle is one of several occipital vertebrae variants. Other variants include:
This anatomical variant may mimic an occipital condyle fracture.
- 1. Offiah CE, Day E. The craniocervical junction: embryology, anatomy, biomechanics and imaging in blunt trauma. Insights into imaging. 8 (1): 29-47. doi:10.1007/s13244-016-0530-5 - Pubmed
- 2. M. B. eser, B. Baysal, B. Atalay, C. Önal, S. erdemli. Congenital Craniocervical Junction Anomalies Incidentally Detected in Routine CT and MR Evaluation: A Pictoral Essay. European Congress of Radiology - ECR 2018. 2018. https://epos.myesr.org/poster/esr/ecr2018/C-2555
- 3. Rao P. Median (Third) Occipital Condyle. Clin Anat. 2002;15(2):148-51. doi:10.1002/ca.1111 - Pubmed
- 4. La Marca F, Zubay G, Morrison T, Karahalios D. Cadaveric Study for Placement of Occipital Condyle Screws: Technique and Effects on Surrounding Anatomic Structures. SPI. 2008;9(4):347-53. doi:10.3171/spi.2008.9.10.347 - Pubmed