A case report of atlanto-occipital assimilation

Ashwini S. Shetty, Raghu Jetti*, Srinivasa Rao Sirasanagandla, Venumadhav Nelluri

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)


Background: Congenital fusion of atlas to the basiocciput is defined as atlanto-occipital assimilation/occipitalization of atlas. Case report: During the norma basalis demonstration session of skull, we have noticed an assimilation/occipitalization of atlas vertebra. Atlas fusion may be complete or partial; assimilation of atlas is associated with neurovascular and skeletal anomalies. Conclusion: Atlanto-occipital fusion may reduce the dimensions of foramen magnum thereby leads to brain stem compression causing the consequent neurological complications. Present case may pose difficulty in performing cisternal puncture. This anomaly has high clinical significance as it mimics the Arnold Chiari malformation.

Original languageEnglish
Pages (from-to)169-171
Number of pages3
JournalBangladesh Journal of Medical Science
Issue number1
Publication statusPublished - 2018


  • Assimilation
  • Atlas
  • Clinical significance
  • Jugular foramen
  • Occipital bone
  • Septation

ASJC Scopus subject areas

  • General Medicine


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