WordNet

comparative of little; "she walks less than she should"; "he works less these days"
used to form the comparative of some adjectives and adverbs; "less interesting"; "less expensive"; "less quickly" (同)to a lesser extent
(comparative of `little usually used with mass nouns) a quantifier meaning not as great in amount or degree; "of less importance"; "less time to spend with the family"; "a shower uses less water"; "less than three years old"
(nonstandard in some uses but often idiomatic with measure phrases) fewer; "less than three weeks"; "no less than 50 people attended"; "in 25 words or less"
(usually preceded by `no'
smaller in size or amount or value; "the lesser powers of Europe"; "the lesser anteater"
of less size or importance; "the lesser anteater"; "the lesser of two evils"
a structure resembling a bag in an animal
of or relating to or affecting the peritoneum; "peritoneal cancer"

PrepTutorEJDIC

(量が)(…より)『もっと少ない』,いっそう少ない;(大きさ・価値・程度などが)(…より)『もっと少ない』,さらに劣る,もっと低い《+『than』…》 / もっと少なく,…ほどでなく《+『than…』》 / 《形容詞・副詞の劣勢の意の比較級を作るのに用いて》…ほど…でない《+『than…』》 / さらに少ない数(量) / …だけ足りない,を引いた
『いっそう小さい(少ない,重要でない)』,より劣った
小袋,のう(動植物の内部にあり,特に液を含んだもの)

Wikipedia preview

出典(authority):フリー百科事典『ウィキペディア（Wikipedia）』「2015/09/02 14:36:00」(JST)

wiki en

The lesser sac, also known as the omental bursa, is the cavity in the abdomen that is formed by the lesser and greater omentum. Usually found in mammals, it is connected with the greater sac via the omental foramen (previously known as the Foramen of Winslow). In mammals, it is not uncommon for the lesser sac to contain considerable amounts of fat.

Anatomic margins

It is demarcated anteriorly by the quadrate lobe of the liver, the stomach, lesser omentum and gastrocolic ligament. Posteriorly it is marked by the pancreas. Its left lateral margin is made by the left kidney and adrenal gland. Its boundary on the right is made by the omental foramen and lesser omentum.^[1] If these structures rupture they may leak into the lesser sac. For the stomach, which lies anterior to the lesser sac, the rupture must be on the posterior side; if it were anteriorly located, the leak would collect in the greater sac.

The lesser sac is embryologically formed from an infolding of the greater omentum. The open end of the infolding, known as the omental foramen, is usually close to the stomach.

Additional images

Schematic figure of the bursa omentalis, etc. Human embryo of eight weeks.
Diagrams to illustrate the development of the greater omentum and transverse mesocolon.
Omental bursa

References

^ Shahani RB, Bijlani RS, Dalvi AN, Shah HK, Samsi AB. Massive upper gastrointestinal haemorrhage due to direct visceral erosion of splenic artery aneurysm. J Postgrad Med 1994;40:220–2. Full Text.

External links

"Lesser sac". Medcyclopaedia. GE. Archived from the original on 2012-02-05.
Anatomy photo:37:09-0100 at the SUNY Downstate Medical Center – "Abdominal Cavity: The Lesser Peritoneal Sac"
Anatomy image:8070 at the SUNY Downstate Medical Center

UpToDate Contents

全文を閲覧するには購読必要です。 To read the full text you will need to subscribe.

1. 卵巣癌、卵管癌、および腹膜癌：病期分類および初期外科的マネージメント cancer of the ovary fallopian tube and peritoneum staging and initial surgical management
2. 持続的腹膜透析における腹部ヘルニア abdominal hernias in continuous peritoneal dialysis
3. 部位不明妊娠の超音波検査 ultrasonography of pregnancy of unknown location
4. 膵液瘻：臨床的特徴および診断 pancreatic fistulas clinical manifestations and diagnosis
5. Overview of visceral artery aneurysm and pseudoaneurysm

English Journal

Epigenetic biomarkers in epithelial ovarian cancer.

Gloss BS, Samimi G.SourceCancer Research Program, Garvan Institute of Medical Research, Sydney, Australia.
Cancer letters.Cancer Lett.2014 Jan 28;342(2):257-63. doi: 10.1016/j.canlet.2011.12.036. Epub 2012 Jan 12.
Ovarian cancer is the most lethal gynecological malignancy and the 5th leading cause of cancer death in women. Women with ovarian cancer are typically diagnosed at late stage, when the cancer has spread into the peritoneal cavity and complete surgical removal is difficult. The 5-year survival time f
PMID 22245949

Composition of intraperitoneally implanted electrospun conduits modulates cellular elastic matrix generation.

Bashur CA, Ramamurthi A.SourceDepartment of Biomedical Engineering, Cleveland Clinic, Cleveland, OH 44195, USA.
Acta biomaterialia.Acta Biomater.2014 Jan;10(1):163-72. doi: 10.1016/j.actbio.2013.08.042. Epub 2013 Sep 7.
Improving elastic matrix generation is critical to developing functional tissue engineered vascular grafts. Therefore, this study pursued a strategy to grow autologous tissue in vivo by recruiting potentially more elastogenic cells to conduits implanted within the peritoneal cavity. The goal was to
PMID 24016842

Polysaccharide isolated from Agardhiella ramosissima: Chemical structure and anti-inflammation activity.

Batista JA, Dias EG, Brito TV, Prudêncio RS, Silva RO, Ribeiro RA, Souza MH, de Paula RC, Feitosa JP, Chaves LS, Melo MR, Freitas AL, Medeiros JV, Barbosa AL.SourceLAFFEX - Laboratory of Experimental Physiopharmacology, Biotechnology and Biodiversity Center Research (BIOTEC), Federal University of Piauí-CMRV, Parnaiba, Piauí, Brazil.
Carbohydrate polymers.Carbohydr Polym.2014 Jan;99:59-67. doi: 10.1016/j.carbpol.2013.08.071. Epub 2013 Aug 28.
The sulfated polysaccharide (PLS) fraction of Agardhiella ramosissima was characterized by microanalysis, infrared spectroscopy, NMR and gas-liquid-chromatography-mass-spectrometry. The main constituent of PLS was the ι carrageenan. The monosaccharide composition of the PLS showed galactose, 3,6-an
PMID 24274479