Petro-occipital fissure
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Petrooccipital synchondrosis
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The petro-occipital synchondrosis, also known as the petroclival synchondrosispetrooccipital fissure/suture,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
- anterior: foramen lacerum
- medial: basilar part of the occipital bone
- lateral: petrous temporal bone
- posterior: jugular foramen
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).
-<p>The <strong>petro-occipital synchondrosis</strong>, also known as the <strong>petroclival synchondrosis</strong>,<strong> </strong>is a <a href="/articles/cartilaginous-joints">primary cartilaginous joint</a> between the basilar part of the <a href="/articles/occipital-bone">occipital bone</a> and the <a href="/articles/petrous-part-of-temporal-bone">petrous temporal bone</a>. 'Fissure' and 'junction' are other terms used to describe this structure, however, <a href="/articles/synchondrosis">synchondrosis</a> is technically more correct. </p><h4>Gross anatomy</h4><p>It is a skull base landmark located in the anterior portion of the posterior fossa.</p><h5>Relations and boundaries</h5><ul>- +<p>The <strong>petro-occipital synchondrosis</strong>, also known as the <strong>petrooccipital fissure/suture</strong>,<strong> </strong>is a <a href="/articles/cartilaginous-joints">primary cartilaginous joint</a> between the basilar part of the <a href="/articles/occipital-bone">occipital bone</a> and the <a href="/articles/petrous-part-of-temporal-bone">petrous temporal bone</a>. 'Fissure' and 'junction' are other terms used to describe this structure, however, <a href="/articles/synchondrosis">synchondrosis</a> is technically more correct. </p><h4>Gross anatomy</h4><p>It is a skull base landmark located in the anterior portion of the posterior fossa.</p><h5>Relations and boundaries</h5><ul>
-</ul><h4>Related pathology</h4><p>The fissure is clinically important as it is often associated with skeletal myxoid chondrosarcomas of the skull base (~66% of cranial base <a title="Chondrosarcomas" href="/articles/chondrosarcoma">chondrosarcomas</a>).</p>- +</ul><h4>Related pathology</h4><p>The fissure is clinically important as it is often associated with skeletal myxoid chondrosarcomas of the skull base (~66% of cranial base <a href="/articles/chondrosarcoma">chondrosarcomas</a>).</p>
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