Hiatus (anatomy)

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In anatomy, a hiatus is a natural fissure in a structure. Examples include:

Adductor hiatus
Aortic hiatus
Esophageal hiatus, the opening in the diaphragm through which the oesophagus passes from the thorax into the abdomen
Greater petrosal nerve hiatus
Maxillary hiatus
Sacral hiatus
Semilunar hiatus
Urogenital hiatus