WordNet

join with a suture; "suture the wound after surgery"
a seam used in surgery (同)surgical seam
thread of catgut or silk or wire used by surgeons to stitch tissues together
an immovable joint (especially between the bones of the skull) (同)sutura, fibrous joint
surgical joining of two surfaces

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〈U〉(傷口などの)縫合 / 〈C〉縫合糸;(傷口などの)縫い目

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出典(authority):フリー百科事典『ウィキペディア（Wikipedia）』「2015/06/19 11:03:12」(JST)

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The lambdoid suture (or lambdoidal suture) is a dense, fibrous connective tissue joint on the posterior aspect of the skull that connects the parietal bones with the occipital bone. It is continuous with the occipitomastoid suture.

Its name comes from its lambda-like shape.

Clinical significance

At birth, the bones of the skull do not meet. If certain bones of the skull grow too fast, then craniosynostosis (premature closure of the sutures) may occur. This can result in skull deformities. If the lambdoid suture closes too soon on one side, the skull will appear twisted and asymmetrical, a condition called "plagiocephaly." Plagiocephaly refers to the shape and not the condition. The condition is craniosynostosis.

The lambdoidal suture articulates with the occipital bone and parietal bones.

Additional images

Animation. Lambdoid suture shown in red.
Parietal bones (above) and occipital bone (below).
Skull seen from behind. Showing λ-like shape of the lambdoid suture.
Lambdoid suture seen from above.
Lambdoid suture seen from inside.
Lambdoid suture, medial view. Indicated by yellow line.
Lambdoid suture with wormian bones, seen from behind.

References

"Sagittal suture." Stedman's Medical Dictionary, 27th ed. (2000).
Moore, Keith L., and T.V.N. Persaud. The Developing Human: Clinically Oriented Embryology, 7th ed. (2003).

External links

Anatomy figure: 22:01-03 at Human Anatomy Online, SUNY Downstate Medical Center (Posterior)
Anatomy figure: 22:03-02 at Human Anatomy Online, SUNY Downstate Medical Center (Lateral)
Anatomy diagram: 34256.000-2 at Roche Lexicon - illustrated navigator, Elsevier
Diagram at SUNY/Upstate

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. 頭蓋骨縫合早期癒合症の概要 overview of craniosynostosis
2. 小児における身体的診察：HEENT the pediatric physical examination heent
3. 縫合糸による皮膚創傷部の閉鎖 closure of skin wounds with sutures
4. 腹壁閉鎖の原則 principles of abdominal wall closure
5. 新生児の評価 assessment of the newborn infant

English Journal

New-Onset Craniosynostosis After Posterior Vault Distraction Osteogenesis.

Tahiri Y1, Paliga JT, Bartlett SP, Taylor JA.
The Journal of craniofacial surgery.J Craniofac Surg.2014 Dec 2. [Epub ahead of print]
The aims of this study were to document the incidence of new-onset craniosynostosis (NOC) after posterior vault distraction osteogenesis (PVDO), to determine risk factors for the development of NOC, and to deduce the cranial ramifications of NOC. An institutional review board-approved retrospective
PMID 25469894

Severe craniosynostosis with Noonan syndrome phenotype associated with SHOC2 mutation: clinical evidence of crosslink between FGFR and RAS signaling pathways.

Takenouchi T1, Sakamoto Y, Miwa T, Torii C, Kosaki R, Kishi K, Takahashi T, Kosaki K.
American journal of medical genetics. Part A.Am J Med Genet A.2014 Nov;164A(11):2869-72. doi: 10.1002/ajmg.a.36705. Epub 2014 Aug 13.
Dysregulation in the RAS signaling cascade results in a family of malformation syndromes called RASopathies. Meanwhile, alterations in FGFR signaling cascade are responsible for various syndromic forms of craniosynostosis. In general, the phenotypic spectra of RASopathies and craniosynostosis syndro
PMID 25123707

Occipital plagiocephaly: unilateral lambdoid synostosis versus positional plagiocephaly.

Linz C1, Collmann H2, Meyer-Marcotty P3, Böhm H1, Krauß J2, Müller-Richter UD1, Ernestus RI4, Wirbelauer J5, Kübler AC1, Schweitzer T3.
Archives of disease in childhood.Arch Dis Child.2014 Oct 1. pii: archdischild-2014-305944. doi: 10.1136/archdischild-2014-305944. [Epub ahead of print]
OBJECTIVE: We defined parameters that could differentiate between positional and synostotic plagiocephaly and defined a diagnostic chart for decision making.DESIGN: Prospective study.SETTING: We examined 411 children with non-syndromic skull abnormalities between January 2011 and December 2012.PARTI
PMID 25275089

Related Pictures

★リンクテーブル★

リンク元	「ラムダ縫合」「人字縫合」

「ラムダ縫合」

Lambdoid suture
	Lambdoid suture (shown in red line)
	Lambdoid suture (labeled at bottom right)
Details
Latin	sutura lambdoidea
Identifiers
Gray's	p.132
Dorlands; /Elsevier	12774079
TA	A03.1.02.004
FMA	52933
	Anatomical terms of bone