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Aortic hiatus

The aortic hiatus is one the three major apertures through the diaphragm and lies at the level of T12. Strictly speaking, it is not a real aperture in the diaphragm, but a osseoaponeurotic opening between it and the vertebral column

The hiatus is situated sightly to the left of the midline and is bounded in front by the crura and behind by L1.

A number of structures pass through the aortic hiatus:


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Thoracic anatomy

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