WordNet

put into a recess; "recess lights"
a small concavity (同)recession, niche, corner
an enclosure that is set back or indented (同)niche
make a recess in; "recess the piece of wood"
resembling an alcove

PrepTutorEJDIC

〈C〉〈U〉(通常の活動の一時的な)『休み』,休憩 / 〈U〉《米》(学校の)休み時間,休暇 / 〈C〉(本棚・戸棚などをはめ込むための)(部屋の)引っ込み / 〈C〉《しばしば複数形で》《文》奥まった所,隠れた所 / 〈部屋〉‘に'引っ込みを作る;〈戸棚など〉‘を'引っ込みにはめ込む / 休憩する,休会する

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出典(authority):フリー百科事典『ウィキペディア（Wikipedia）』「2017/04/30 02:42:12」(JST)

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On either side of the laryngeal orifice is a recess, termed the piriform sinus (also piriform recess, pyriform sinus, piriform fossa, or smuggler's fossa), which is bounded medially by the aryepiglottic fold, laterally by the thyroid cartilage and thyrohyoid 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.)

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.^[1] 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.^[2]

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 (especially 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

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

^ Moore, K.L., & Agur, A.M.R (2007). Essential Clinical Anatomy: Third Edition. Baltimore: Lippincott Williams & Wilkins. ISBN 978-0-7817-6274-8
^ AJCC Cancer Staging Handbook: From the AJCC Cancer Staging Manual, Sixth Edition. Ed. Frederick L. Greene, M.D. page 48.

External links

Anatomy photo:31:17-0105 at the SUNY Downstate Medical Center - "Pharynx: The Laryngopharynx"

UpToDate Contents

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2. 副甲状腺の外科解剖学 surgical anatomy of the parathyroid glands
3. 甲状腺の概要 overview of thyroiditis
4. 上部消化管内視鏡検査（食道胃十二指腸内視鏡検査）の概要 overview of upper gastrointestinal endoscopy esophagogastroduodenoscopy
5. 肩の運動器超音波 musculoskeletal ultrasound of the shoulder

English Journal

Maxillary V-4: Four implant treatment for maxillary atrophy with dental implants fixed apically at the vomer-nasal crest, lateral pyriform rim, and zygoma for immediate function. Report on 44 patients followed from 1 to 3 years.

Jensen OT1, Adams MW2, Butura C3, Galindo DF3.
The Journal of prosthetic dentistry.J Prosthet Dent.2015 Sep 3. pii: S0022-3913(15)00324-8. doi: 10.1016/j.prosdent.2014.11.018. [Epub ahead of print]
STATEMENT OF PROBLEM: The V-4 implant placement technique is important for restoring patients with maxillary atrophy, but little has been documented on the outcomes of these treatments.PURPOSE: The purpose of this study was to evaluate the outcome of immediate function after 1 year when implants wer
PMID 26344193

Alcohol consumption and the risk of cancer in Brazil: A study involving 203,506 cancer patients.

Menezes RF1, Bergmann A2, Aguiar SS1, Thuler LC3.
Alcohol (Fayetteville, N.Y.).Alcohol.2015 Aug 1. pii: S0741-8329(14)20067-X. doi: 10.1016/j.alcohol.2015.07.001. [Epub ahead of print]
This study aims to analyze the association between alcohol consumption and the risk of developing the most common types of cancer in the Brazilian population. It is a case-control study in which the most common types of cancer were considered as cases and non-melanoma skin cancers as controls. Data
PMID 26298519

Impact of nasogastric tubes on swallowing physiology in older, healthy subjects: A randomized controlled crossover trial.

Pryor LN1, Ward EC2, Cornwell PL3, O'Connor SN4, Finnis ME5, Chapman MJ6.
Clinical nutrition (Edinburgh, Scotland).Clin Nutr.2015 Aug;34(4):572-8. doi: 10.1016/j.clnu.2014.09.002. Epub 2014 Sep 6.
BACKGROUND & AIMS: The presence of a nasogastric tube (NGT) affects swallowing physiology but not function in healthy young adults. The swallowing mechanism changes with increasing age, therefore the impact of a NGT on swallowing in elderly individuals is likely to be different but is not yet kn
PMID 25245858

Japanese Journal

Fiberoptic laryngoscopy used to determine the origin of mediastinal emphysema: A case report

杉山剛,金井宏明,星合美奈子,中野佳央,原田清,杉田完爾
日本小児呼吸器疾患学会雑誌 19(2), 148-153, 2008
… in her oral cavity, and she did not have dyspnea.A computed tomography scan and a radiograph revealed diffuse cervical subcutaneous emphysema and mediastinal emphysema.On examining her mouth using a penlight, no wound could be detected.Perforation of the piriform recess, trachea, or esophagus requires prompt surgical intervention.On examination using a fliberoptic laryngoscopy, a wound with coagulated blood was observed at the pharyngeal posterior wall.But there was no perforation from trachea to carina.We began oxygen …
NAID 130001998986

FDG-PETにより原発巣が判明した原発不明癌例

上田成久,北村拓朗,宇高毅 [他],大淵豊明,塩盛輝夫,加藤明子,鈴木秀明
耳鼻咽喉科臨床 100(5), 385-389, 2007-05-01
… FDG-PET and PET/CT after surgery revealed demonstrated uptake in the right piriform recess of the hypopharynx. … The patient was eventually referred to our department, and underwent biopsy of the piriform recess via direct endoscopy. …
NAID 10020161142

臨床慢性閉塞性肺疾患に声帯麻痺を合併した嚥下障害例

小河孝夫,花満雅一,有方雅彦 [他],瀬野悟史,鈴木幹男,清水猛史
耳鼻咽喉科臨床 98(10), 797-801, 2005
… Expansion of the piriform recess by videofluorography suggested vagus nerve palsy. …
NAID 130001815981

Related Pictures

★リンクテーブル★

リンク元	「梨状陥凹」「梨状窪」
関連記事	「recess」「piriform」

「梨状陥凹」

Piriform sinus
	Piriform sinus, a part of hypopharynx
	The entrance to the larynx, viewed from behind, with Pyriform sinus labeled at bottom left.
Details
Identifiers
Latin	recessus piriformis, sinus piriformis
Dorlands; /Elsevier	r_05/12696766
TA	A05.3.01.024
FMA	55067
	Anatomical terminology [edit on Wikidata]