乳管
- 関
- latex tube、laticifer
WordNet
- a plant duct containing latex
- a continuous tube formed by a row of elongated cells lacking intervening end walls
- an enclosed conduit for a fluid
- a bodily passage or tube lined with epithelial cells and conveying a secretion or other substance; "the tear duct was obstructed"; "the alimentary canal"; "poison is released through a channel in the snakes fangs" (同)epithelial duct, canal, channel
PrepTutorEJDIC
- 送水管;(建物・船などの)通気管;(地下ケーブルなどの)ダクト / (体液を運ぶ)導管,(植物が水・空気を運ぶ)導管
Wikipedia preview
出典(authority):フリー百科事典『ウィキペディア(Wikipedia)』「2016/05/29 17:09:40」(JST)
[Wiki en表示]
Lactiferous duct |
The Breast: cross-section scheme of the mammary gland.
1. Chest wall
2. Pectoralis muscles
3. Lobules
4. Nipple
5. Areola
6. Milk duct
7. Fatty tissue
8. Skin
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Details |
Identifiers |
Latin |
ductus lactiferi, tubulus lactiferi |
Dorlands
/Elsevier |
d_29/12314912 |
TA |
A16.0.02.010 |
FMA |
58006 |
Anatomical terminology
[edit on Wikidata]
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Lactiferous ducts form a tree branched system connecting the lobules of the mammary gland to the tip of the nipple. They are also referred to as galactophores, galactophorous ducts, mammary ducts, mamillary ducts and milk ducts. They are the structures which carry milk toward the nipple in a lactating female.
Contents
- 1 Structure
- 2 Function
- 3 Clinical significance
- 4 See also
- 5 References
Structure
Lactiferous ducts are lined by a columnar epithelium supported by myoepithelial cells. When a woman is not lactating, the lactiferous duct is frequently blocked by a keratin plug. This plug prevents bacteria from entering the duct in non-lactating women. Prior to 2005, it was thought within the areola the lactiferous duct would dilate to form the lactiferous sinus in which milk supposedly accumulates between breastfeeding sessions. However new research suggests that lactiferous sinus does not exist.[1]
Function
The columnar epithelium plays a key role in balancing milk production, milk stasis and resorption. The cells of the columnar epithelium form tight junctions which are regulated by hormones and local factors like pressure and casein content. Prolactin and/or placental lactogen are required for tight junction closure while progesterone is the main hormone preventing closure before birth.[2][3]
Clinical significance
The majority of breast diseases either originate from lactiferous ducts or are closely related. The high susceptibility to benign and malignant diseases is in part a consequence of the cycling hormonal growth stimulation resulting in a high cell turnover and accumulation of defects and complicated hormonal equilibrium which is highly sensible to disturbance.[citation needed]
- most breast cancers arise from the ductal epithelium (see ductal carcinoma in situ)
- phyllodes tumor and intraductal papilloma of the breast
- mastalgia is frequently caused by an imbalance of breast secretion in the lobules and resorption in the ducts
- nonpuerperal mastitis is frequently caused by a similar mechanism in combination with an infection
- duct ectasia is similar and overlapping with the above mentioned
- subareolar abscess and squamous metaplasia of lactiferous ducts
- most forms of fibrocystic breast changes and cysts are thought to originate from lactiferous ducts
See also
References
- ^ Ramsay, D. T.; Kent, J. C.; Hartmann, R. A.; Hartmann, P. E. (2005). "Anatomy of the lactating human breast redefined with ultrasound imaging". Journal of Anatomy 206 (6): 525–534. doi:10.1111/j.1469-7580.2005.00417.x. PMC 1571528. PMID 15960763.
- ^ Nguyen, D. A.; Parlow, A. F.; Neville, M. C. (2001). "Hormonal regulation of tight junction closure in the mouse mammary epithelium during the transition from pregnancy to lactation". The Journal of endocrinology 170 (2): 347–356. doi:10.1677/joe.0.1700347. PMID 11479131.
- ^ Nguyen, D. A.; Neville, M. C. (1998). "Tight junction regulation in the mammary gland". Journal of Mammary Gland Biology and Neoplasia 3 (3): 233–246. doi:10.1023/A:1018707309361. PMID 10819511.
Anatomy of the breast
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Structure |
- Nipple
- Areola
- Mammary gland
- Lactiferous duct
- Mammary alveoli
- Mammary lobule
- Cooper's ligament
- Inframammary fold
- Intermammary cleft
- Retromammary space
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Other |
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UpToDate Contents
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English Journal
- Refraction-based 2D, 2.5D and 3D medical imaging: stepping forward to a clinical trial.
- Ando M, Bando H, Endo T, Ichihara S, Hashimoto E, Hyodo K, Kunisada T, Li G, Maksimenko A, Mori K, Shimao D, Sugiyama H, Yuasa T, Ueno E.SourceTokyo University of Science, Research Institute for Science and Technology, Noda, Chiba 278-8510, Japan. msm-ando@rs.noda.tus.ac.jp
- European journal of radiology.Eur J Radiol.2008 Dec;68(3 Suppl):S32-6. doi: 10.1016/j.ejrad.2008.04.033. Epub 2008 Jul 11.
- An attempt at refraction-based 2D, 2.5D and 3D X-ray imaging of articular cartilage and breast carcinoma is reported. We are developing very high contrast X-ray 2D imaging with XDFI (X-ray dark-field imaging), X-ray CT whose data are acquired by DEI (diffraction-enhanced imaging) and tomosynthesis d
- PMID 18620829
Japanese Journal
- 2D and 3D Visualization of Ductal Carcinoma in situ (DCIS) using X-Ray Refraction Contrast
- , , , , , , , , , , , , , , , , , ,
- bioimages 14, 1-8, 2006
- … A large area involving a distorted linear structure and ductus lactiferi has been visualized by 2D XDFI (X-ray dark-field imaging) and furthermore a rod measuring 3.6 mm in diameter and 4.7 mm in height excised from the tissue was observed by 3D X-ray CT. … As a result the ductus lactiferi and microcalcification in a 3D form were all clearly visible. …
- NAID 130004479911
- Attempt at Visualizing Breast Cancer with X-ray Dark Field Imaging
- Ando Masami,Yamasaki Katsuhito,Toyofuku Fukai,Sugiyama Hiroshi,Ohbayashi Chiho,Li Gang,Pan Lin,Jiang Xiaoming,Pattanasiriwisawa Wanwisa,Shimao Daisuke,Hashimoto Eiko,Kimura Tatsuro,Tsuneyoshi Masazumi,Ueno Ei,Tokumori Kenji,Maksimenko Anton,Higashida Yoshiharu,Hirano Masatsugu
- Jpn J Appl Phys 44(17), L528-L531, 2005-04-10
- … X-ray dark-field imaging (DFI) can clearly visualize breast cancer phantoms and cancer cell nests, stroma, fat tissue, ductus lactiferi, muscle, collagen fibers at stroma and calcification in a 2.8-mm-thick breast cancer pathological specimen. …
- NAID 150000013554
- Attempt at Visualizing Breast Cancer with X-ray Dark Field Imaging
- , , , , , , , , , , , , , , , , ,
- Japanese Journal of Applied Physics 44(16-19), L528-L531, 2005
- … X-ray dark-field imaging (DFI) can clearly visualize breast cancer phantoms and cancer cell nests, stroma, fat tissue, ductus lactiferi, muscle, collagen fibers at stroma and calcification in a 2.8-mm-thick breast cancer pathological specimen. …
- NAID 130004533030
Related Links
- lac·tif·er·ous ducts [TA] one of the ducts, numbering 15-20, which drain the lobes of the mammary gland; they open at the nipple. Synonym(s): ductus lactiferi [TA], canalicular ducts (1) , galactophore, galactophorous canals, galactophorous ducts ...
- Looking for online definition of ductus (et sinus) lactiferi [NA6] in the Medical Dictionary? ductus (et sinus) lactiferi [NA6] explanation free. What is ductus (et sinus) lactiferi [NA6]? Meaning of ductus (et sinus) lactiferi [NA6 ? ...
Related Pictures
![Milchgang (Ductus lactiferi)](https://1mg.info/0/6/0/2551.jpg)
![ductus lactiferi ausführungsgänge der](https://1mg.info/0/6/0/2552.jpg)
![Milchgang (Ductus lactiferi)](https://1mg.info/0/6/0/2553.jpg)
![TB Reproduktion Anatomie Mamma](https://1mg.info/0/6/0/2554.jpg)
![проток ductus lactiferi](https://1mg.info/0/6/0/2555.jpg)
★リンクテーブル★
[★]
- 英
- lactiferous duct, galactophorous duct, mammary duct
- ラ
- ductus lactiferi
- 関
- 乳房
[★]
乳管
- 関
- ductus lactiferi、latex tube
[★]
乳管
- 関
- ductus lactiferi、laticifer
[★]
- 関
- canal、conduit、ductal、ductus、meatus、pipe、tubal、tube、vas、vessel
[★]
管
- 関
- canal、duct、ductal、meatus、pipe、tubal、tube、vas