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出典(authority):フリー百科事典『ウィキペディア（Wikipedia）』「2022/11/12 03:32:15」(JST)

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The semilunar hiatus or hiatus semilunaris, is a crescent-shaped groove in the lateral wall of the nasal cavity just inferior to the ethmoid bulla. It is the location of the openings of the maxillary sinuses. It is bounded inferiorly and anteriorly by the sharp concave margin of the uncinate process of the ethmoid bone, superiorly by the ethmoid bulla, and posteriorly by the middle nasal concha.

Sinus drainage

Following the curve anteriorly leads into the infundibulum of the frontonasal duct, which drains the frontal sinus.

The anterior ethmoidal cells of the ethmoidal sinus open into the front part of the infundibulum as well. In slightly over 50% of subjects, this is directly continuous with the frontonasal duct from the frontal 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 the middle meatus.

The ostium for the maxillary sinus opens posteriorly in this groove and is the largest ostium within the semilunar hiatus.

References

This article incorporates text in the public domain from page 995 of the 20th edition of Gray's Anatomy (1918)

External links

Anatomy figure: 33:04-05 at Human Anatomy Online, SUNY Downstate Medical Center

UpToDate Contents

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1. 鼻症状の原因：概要etiologies of nasal symptoms an overview [show details]
…are positioned in the midface, over the eyes, and drain through the frontal recess into the hiatus semilunaris in the ostiomeatal complex Acute inflammation of the frontal sinuses can cause the forehead …
2. 裂孔ヘルニアhiatus hernia [show details]
…tubular esophagus within the abdomen . Hiatus hernia refers to herniation of elements of the abdominal cavity through the esophageal hiatus of the diaphragm. Hiatus hernias are broadly divided into sliding …
3. 逆流性食道炎の病態生理pathophysiology of reflux esophagitis [show details]
…reflux esophagitis correlates with the size of hiatus hernia . There are several mechanisms underlying the development of GERD in patients with a hiatus hernia. Mechanisms include impairment of the crural …
4. component separation法（腹壁瘢痕ヘルニア修復法）の概要overview of component separation [show details]
…Rather, fibers of the IO aponeurosis branch into anterior and posterior lamellae at the linea semilunaris More medially (1 to 3 cm), fibers of the EO aponeurosis fuse with fibers of the anterior lamella …
5. 傍食道型食道裂孔ヘルニアへの外科的マネージメントsurgical management of paraesophageal hernia [show details]
…identified, and its relative position to the hiatus is assessed. With the lower esophagus adequately mobilized, if the esophagogastric junction remains at or above the hiatus, a shortened esophagus is diagnosed …

English Journal

The Anterior Ethmoidal "Genu": A Newly Appreciated Anatomic Landmark for Endoscopic Sinus Surgery.

Bolger WE, Stammberger H, Ishii M, Ponikau J, Solaiyappan M, Zinreich SJ.
Clinical anatomy (New York, N.Y.). 2019 May;32(4)534-540.
Human sinonasal anatomy varies widely between patients, challenging surgeons operating in the sinuses. Ethmoid sinus anatomy is so variable it has been referred to as a labyrinth. Accordingly, reliable, consistent anatomic landmarks aid surgeons operating in this region. The goal of this investigati
PMID 30719771

Localization of the Maxillary Ostium in Relation to the Reduction of Depressed Nasomaxillary Fractures.

Hwang K, Wu X, Kim H, Kang YH.
The Journal of craniofacial surgery. 2018 Jul;29(5)1358-1362.
The aim of this study was to elucidate the precise location of the maxillary ostium using computed tomography for the reduction of depressed nasomaxillary fractures.Computed tomography images (61 males, 42 females; age range, 3-97 years) were analyzed. Coronal sections were cut every 3 mm.The prim
PMID 29521750

Anatomic description of the middle meatus and classification of the hiatus semilunaris into five types based upon morphological characteristics.

Dahlstrom K, Olinger A.
Clinical anatomy (New York, N.Y.). 2014 Mar;27(2)176-81.
Anatomical variation of the lateral nasal wall, including the pathway from the frontal, ethmoidal, and maxillary sinuses may affect the communication between the paranasal sinuses and the nasal cavity. The middle meatus and hiatus semilunaris are areas where variations can occur which predispose pat
PMID 23836582

Japanese Journal

CT前額断像によるOsteomeatal unit（OMU：洞口鼻道系）と歯性上顎洞炎の関連

歯科放射線 47(2), 47-52, 2007
NAID 130004503190

小児慢性副鼻こう炎に対するせん刺洗浄療法　　ステロイド加抗生剤注入の効果について:ステロイド加抗生剤注入の効果について

耳鼻咽喉科展望 28(1), 11-17, 1985
NAID 130003794264

ヒト胎児の蝸牛窓の発生について

耳鼻と臨床 28(5Supplement3), 845-849, 1982
NAID 130004402716

「半月裂孔」

Semilunar hiatus
Semilunar hiatus
	Lateral wall of nasal cavity; the three nasal conchæ have been removed. (Third caption from the top.)
Details
Identifiers
Latin	hiatus semilunaris
TA98	A06.1.02.028; A02.1.07.018
TA2	739, 3153
FMA	77281 75057, 77281
	Anatomical terminology [edit on Wikidata]