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The superior thoracic aperture, also known as the thoracic outlet, or thoracic inlet refers to the opening at the top of the thoracic cavity. It is also clinically referred to as the thoracic outlet, in the case of thoracic outlet syndrome
Apart from the diaphragm, the list of structures that pass through the inferior thoracic outlet is best described by considering the various diaphragmatic apertures: aortic hiatus (T12) (not a true aperture) esophageal hiatus (T10) vena caval foramen (T8)
