piriform fossa

梨状陥凹

WordNet

1. largest carnivore of Madagascar; intermediate in some respects between cats and civets (同)fossa cat, Cryptoprocta ferox
2. monotypic genus of Madagascar civets closely related to palm civets (同)genus Fossa

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出典(authority):フリー百科事典『ウィキペディア（Wikipedia）』「2012/11/11 16:40:19」(JST)

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Piriform sinus
Piriform sinus, a part of hypopharynx
The entrance to the larynx, viewed from behind, with Pyriform sinus labeled at bottom left.
Latin	recessus piriformis, sinus piriformis
Gray's	subject #244 1142

On either side of the laryngeal orifice is a recess, termed the piriform sinus (also piriform recess, pyriform sinus, or piriform fossa), which is bounded medially by the aryepiglottic fold, laterally by the thyroid cartilage and hyothyroid membrane. The fossae are involved in speech.

The term "piriform," which means "pear-shaped," is also sometimes spelled "pyriform" (as in the diagram on this page.)

It is also known as smuggler's fossa!

Deep to the mucous membrane of the piriform fossa lie the recurrent laryngeal nerve as well as the internal laryngeal nerve, a branch of the superior laryngeal nerve. The internal laryngeal nerve supplies sensation to the area, and it may become damaged if the mucous membrane is inadvertently punctured.

The piriform sinus is a subsite of the hypopharynx. This distinction is important for head and neck cancer staging and treatment.

Clinical significance

It is a common place for food to become trapped; if foreign material becomes lodged in the piriform fossa of an infant, it may be retrieved nonsurgically. If the area is injured (e.g., by a fish bone), it can give the sensation of food stuck in the throat.

The persistency of the piriform sinus (specially on the left side) is a common cause of acute thyroiditis in children and adolescents. Local anesthesia can be given here because of the presence of internal laryngeal nerve underneath the mucous membrane.

References

External links

• SUNY Labs 31:17-0105 - "Pharynx: The Laryngopharynx"

This article was originally based on an entry from a public domain edition of Gray's Anatomy. As such, some of the information contained within it may be outdated.

UpToDate Contents

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English Journal

• Endoscopic chemocauterization for pyriform sinus fistulas in children.

• Yanagisawa S1, Oshio T1,2, Kato M1, Kano M1, Tsuji Y1, Morikawa Y1.
• Pediatrics international : official journal of the Japan Pediatric Society.Pediatr Int.2017 Apr 7. doi: 10.1111/ped.13294. [Epub ahead of print]
• PMID 28387991

• Vocal function after transoral videolaryngoscopic surgery (TOVS) for hypopharyngeal and supraglottic cancer.

• Tanaka S1, Tomifuji M1, Araki K1, Uno K1, Tanaka Y1, Mizokami D1, Suzuki H1, Miyagawa Y1, Taniai S1, Shiotani A1.
• Acta oto-laryngologica.Acta Otolaryngol.2017 Apr;137(4):403-410. doi: 10.1080/00016489.2016.1266509. Epub 2016 Dec 15.
• PMID 27976979

• Long-term outcomes of type I thyroplasty with silicone implantation: Assessment of excised laryngeal tissue from a patient with secondary hypopharyngeal carcinoma.

• Adachi K1, Umezaki T2, Nishijima T3, Yamamoto H3, Oda Y3.
• Auris, nasus, larynx.Auris Nasus Larynx.2017 Apr;44(2):245-248. doi: 10.1016/j.anl.2016.07.007. Epub 2016 Aug 17.
• PMID 27543073

Japanese Journal

• 左右の梨状窩の音響的相互作用(音声一般・生成,合成,生成,韻律,音声一般)

• 竹本 浩典,足立 整治,MOKHTARI Parham,北村 達也
• 電子情報通信学会技術研究報告. SP, 音声 110(297), 7-12, 2010-11-11
• 声道伝達関数における左右の梨状窩に由来する2つの零点の周波数は,どちらの梨状窩の共鳴周波数とも一致しない.これは左右の梨状窩の相互作用によって零点の周波数が決定されるからである.本稿では,この相互作用を検討するために,声道を単純な形状でモデル化し,時間領域差分法を用いて零点の周波数における音圧分布を計算した.その結果,低い周波数の零点では,左右の梨状窩が逆相で振動し,高い周波数の零点では同相で振動 …
• NAID 110008152484

• 喉頭温存・下咽頭喉頭部分切除術における切除範囲と再建法について

• 松浦 一登,浅田 行紀,加藤 健吾,山崎 宗治,西條 茂
• 頭頸部外科 = Journal of Japan Society for Head and Neck Surgery 19(2), 111-118, 2009-10-30
• 喉頭温存・下咽頭喉頭部分切除術で，適切な再建術選択の指針は確立されていない。そこで2004年4月より当科で本術式を行った23例を対象として，切除範囲と再建法について検討を行った。一側の披裂喉頭蓋襞と梨状陥凹に留まる切除なら一期縫縮が可能であった。一側の梨状陥凹を越えて後壁や輪状後部に達する切除や，一側の披裂喉頭蓋襞を越えて披裂上半分を含む切除では空腸パッチ再建が必要であった。T3・T4進行癌でも， …
• NAID 10026426799

Related Pictures

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★リンクテーブル★

リンク元	「梨状窩」「梨状陥凹」
関連記事	「piriform」

「梨状窩」

　　[★]

英

pyriform sinus, piriform fossa

Henry Gray (1825-1861). Anatomy of the Human Body. 1918.

「梨状陥凹」

　　[★]

英

piriform fossa (Z), piriform recess (Z)

• 図：Z.P-17,N.62(背面)

「piriform」

　　[★]

• 梨状の、梨型の

関

pyriform