The clivus is a shallow depression located at the skull base behind the dorsum sellae of the sphenoid bone. It is a concave surface that slopes backwards and is formed by the junction of the sphenoid body and the basilar part of the occipital bone. The clivus is situated anterior to the foramen magnum and medial to the foramen lacerum on either side. The pons sits directly on the clivus and the spheno-occipital synchondrosis is present here in the growing child. The basilar plexus is also found over it. The clivus is one of the most common sites of a chordoma, a rare slow-growing neoplasm.
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