hiatus

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Related to hiatus semilunaris: Ethmoidal bulla, Frontonasal duct, Ostiomeatal Unit

hiatus

Anatomy
1. a natural opening or aperture; foramen
2. a less common word for vulva
Collins Discovery Encyclopedia, 1st edition © HarperCollins Publishers 2005

hiatus

[hī′ād·əs]
(anatomy)
A space or a passage through an organ.
(geology)
A gap in a rock sequence due to a lack of deposition of a bed or to erosion of beds.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
The sensitivity of diagnostic endoscopy for frontal recess, middle turbinate and bulla ethmoidalis was found as 91%, 84% and 76% respectively and for sphenoethmoidal recess hiatus semilunaris and middle turbinate as 80%, 53% and 67% respectively.
(1,2) The most consistent drainage pattern of the ethmoid bulla is a path from the posterior medial aspect of the bulla medially into the hiatus semilunaris superior.
The parameters used for correlation were- Deviated Nasal Septum, Inferior Turbinate Hypertrophy, Middle Turbinate abnormalities, Concha Bullosa, Agger Nasi cells, Haller cells, Frontal recess, Infundibulum, Hiatus semilunaris, Uncinate process attachment, Intrasinus mucosal disease of Maxillary, Ethmoids, Frontal and Sphenoid detailed history, clinical examination and routine investigations were done for the patients.
According to Yanagisawa et al, the ostium of the ethmoid bulla is often found in the hiatus semilunaris superior, but it can also be found in the anterior or lateral wall of the ethmoid bulla, the ethmoid infundibulum, the hiatus semilunaris inferior, and the retrobullar recess.