Petro-occipital synchondrosis

The petro-occipital synchondrosis, also known as the petroclival synchondrosis, is a primary cartilaginous joint between the basilar part of the occipital bone and the petrous temporal bone. 'Fissure' and 'junction' are other terms used to describe this structure, however, synchondrosis is technically more correct.  

Gross anatomy

It is a skull base landmark located in the anterior portion of the posterior fossa.

Relations and boundaries

Related pathology

The fissure is clinically important as it is often associated with skeletal myxoid chondrosarcomas of the skull base (~66% of cranial base chondrosarcomas).

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Article information

rID: 37128
Section: Anatomy
Synonyms or Alternate Spellings:
  • Petroclival fissure
  • Petro-occipital fissure
  • Petro-occipital complex
  • Petroclival synchondrosis

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