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The petrous apex is the pyramid-shaped anteromedial part of the petrous part of the temporal bone. It is oriented obliquely in the skull base and articulates with the posterior aspect of the greater wing of the sphenoid and occipital bones.
The lateral boundary is the inner ear, medially the petro-occipital fissure, anteriorly the petrosphenoidal fissure and petrous part of the internal carotid artery in the carotid canal and posteriorly the posterior cranial fossa. Superiorly is the middle cranial fossa, Meckel cave and petrous ICA. Inferiorly is the jugular bulb and inferior petrosal sinus.
- pneumatization of the petrous apex
- petrous apex cephalocoele
- asymmetric fatty bone marrow of the petrous apex
- cholesterol granuloma
- petrous apicitis
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