WordNet

relating to or located near the organ that produces tears (同)lachrymal
of or relating to tears (同)lachrymal
a structure resembling a bag in an animal

PrepTutorEJDIC

=lachrymal / 涙腺(るいせん)の近くにある
小袋,のう(動植物の内部にあり,特に液を含んだもの)

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出典(authority):フリー百科事典『ウィキペディア（Wikipedia）』「2016/01/15 11:23:49」(JST)

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The lacrimal sac or lachrymal sac^[1] is the upper dilated end of the nasolacrimal duct, and is lodged in a deep groove formed by the lacrimal bone and frontal process of the maxilla. It connects the lacrimal canaliculi, which drain tears from the eye's surface, and the nasolacrimal duct, which conveys this fluid into the nasal cavity.

Structure

It is oval in form and measures from 12 to 15 mm. in length; its upper end is closed and rounded; its lower is continued into the nasolacrimal duct.

Its superficial surface is covered by a fibrous expansion derived from the medial palpebral ligament, and its deep surface is crossed by the lacrimal part of the Orbicularis oculi, which is attached to the crest on the lacrimal bone.

Histology

Like the nasolacrimal duct, the sac is lined by stratified columnar epithelium with mucus-secreting goblet cells, with surrounding connective tissue. The Lacrimal Sac also drains the eye of any debris, bacteria, dirt, etc.

Function

This is mainly for high amounts of tears, in which the lacrimal sac pumps inward and outward driven by the orbicularis muscle during blinking.

Clinical significance

The lacrimal sac can be pictured by dacrocystography, which is injecting radiocontrast into it and performing X-ray imaging of it.

Additional images

Medial wall of left orbit.
Left orbicularis oculi, seen from behind.
The lacrimal apparatus. Right side. (Lacrimal sac visible at upper right.)
The tarsi and their ligaments. Right eye; front view. (Lacrimal sac visible at middle right.)

References

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

^ Dr. Johannes Sobotta (1909). Sobotta's Atlas and Textbook of Human Anatomy. Philadelphia.

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English Journal

Clinicopathological features of melanotic neuroectodermal tumor of infancy: Report of two cases.

Higashi K1, Ogawa T2, Onuma M3, Usubuchi H4, Imai Y5, Takata I1, Hidaka H1, Watanabe M4, Sasahara Y3, Koyama S6, Kure S3, Katori Y1.
Auris, nasus, larynx.Auris Nasus Larynx.2016 Aug;43(4):451-4. doi: 10.1016/j.anl.2015.10.010. Epub 2015 Nov 18.
Melanotic neuroectodermal tumor of infancy (MNTI) is an extremely rare, pigmented neoplastic entity of neural crest origin. Histological and immunohistochemical profiles indicate the presence of two components, small rounded neuroblast-like cellular areas and areas with large melanin-containing cell
PMID 26602435

A Multidisciplinary Orbit-Sparing Treatment Approach That Includes Proton Therapy for Epithelial Tumors of the Orbit and Ocular Adnexa.

Holliday EB1, Esmaeli B2, Pinckard J3, Garden AS1, Rosenthal DI1, Morrison WH1, Kies MS4, Gunn GB1, Fuller CD1, Phan J1, Beadle BM1, Zhu XR5, Zhang X5, Frank SJ6.
International journal of radiation oncology, biology, physics.Int J Radiat Oncol Biol Phys.2016 May 1;95(1):344-52. doi: 10.1016/j.ijrobp.2015.08.008. Epub 2015 Aug 7.
PURPOSE: Postoperative radiation is often indicated in the treatment of malignant epithelial tumors of the orbit and ocular adnexa. We present details of radiation technique and toxicity data after orbit-sparing surgery followed by adjuvant proton radiation therapy.METHODS AND MATERIALS: Twenty pati
PMID 26454680

Orbital Extension of Untreated Lacrimal Sac Melanoma Following Dacryocystorhinostomy.

Kavoussi SC1, Levin F, Servat JJ.
Ophthalmic plastic and reconstructive surgery.Ophthal Plast Reconstr Surg.2016 May-Jun;32(3):e76. doi: 10.1097/IOP.0000000000000539.
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Japanese Journal

涙嚢炎より発症した小児眼窩顔面骨膜下膿瘍例

加藤一郎,中山敦詞,岩田昇,藤澤利行,西村洋一,中田誠一,鈴木賢二
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NAID 10030933406

涙部腫瘤性疾患の頻度と画像診断の有用性についての検討 (特集第65回日本臨床眼科学会講演集(4))

児玉俊夫,野口毅,山西茂喜
臨床眼科 66(6), 819-826, 2012-06
NAID 40019358918

「涙嚢」

Lacrimal sac
	The lacrimal apparatusis shown through dissection on the left side.
	The lacrimal sac has been opened showing internal organization as well as the naso-lacrymal duct.
Details
Latin	saccus lacrimalis
Artery	angular artery
Identifiers
Gray's	p.1028
Dorlands; /Elsevier	s_01/12717293
TA	A15.2.07.068
FMA	20289
	Anatomical terminology