- Semilunar hiatus
Infobox Anatomy
Name = PAGENAME
Latin = hiatus semilunaris
GraySubject = 223
GrayPage = 995
Caption = Lateral wall of nasal cavity; the three nasal conchæ have been removed. (Third caption from the top.)
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DorlandsPre = h_11
DorlandsSuf = 12422076
The hiatus semilunaris is a halfmoon-shaped groove in the lateral wall of the nasal cavity. It is bounded inferiorly and anteriorly by the sharp concave margin of theuncinate process of theethmoid bone , superiorly by theethmoidal bulla , and posteriorly by the ethmoidal process of theinferior nasal concha . Following the curve anteriorly leads into the infundibulum of thefrontonasal duct , which drains the frontal sinus.The
anterior ethmoidal cells open into the front part of the infundibulum; in slightly over 50% of subjects, this is directly continuous with the frontonasal duct from thefrontal air sinus . When the anterior end of the uncinate process fuses with the front part of the bulla, however, this continuity is interrupted and the frontonasal duct then drains directly into the anterior end of themiddle meatus .External links
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