Cyst
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225292588
2008-07-12T22:44:56Z
Arcadian
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infobox
{{otheruses4|cysts in the body|the [[ICAO airport code]] '''CYST'''|St. Theresa Point Airport|hard-shelled resting stages of some small organisms|Microbial cyst}}
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A '''cyst''' is a closed sac having a distinct [[biological membrane|membrane]] and [[division]] on the nearby [[Biological tissue|tissue]]. They may contain [[air]], fluids, or semi-solid material. A collection of [[pus]] is called an [[abscess]], not a cyst. Once formed, the cyst could go away by itself or will have to be removed using surgery.
== Locations ==
* [[Arachnoid cyst]] (between the surface of the brain and the cranial base or on the arachnoid membrane)
* [[Baker's Cyst]] (behind the knee joint)
* [[Bartholin's cyst]]
* [[Breast cyst]]
* [[Chalazion|Chalazion cyst]] (eyelid)
* [[Cysticercosis|Cysticercal cyst]] (the larval stage of ''Taenia sp.'')
* [[Dentigerous Cyst]] (associated with the crowns of non-erupted teeth)
* [[Dermoid cyst]] (ovaries, testes, many other locations from head to tailbone)
* [[Epididymal Cyst]] (found in the vessels attached to the testes)
* [[Ganglion cyst]] (hand/foot joints and tendons)
* Glial Cyst (in the brain)
* [[Gartner's duct]] cyst (vaginal or vulvar cyst of embryological origin)
* [[Hydatid cyst]] (larval stage of ''Echinococcus granulosus'' ([[tapeworm]]))
* [[Odontogenic keratocyst|Keratocyst]] (in the jaws, these can appear solitary or associated with the Gorlin-Goltz or [[Nevoid basal cell carcinoma syndrome]]. The latest [[World Health Organization]] classification considers Keratocysts as tumors rather than cysts)
* [[Polycystic liver disease|Liver cystic disease]]
* [[Chalazion|Meibomian cyst]] (eyelid)
* [[Nabothian cyst]] (cervix)
* [[Ovarian cyst]] (ovaries, functional and pathological)
* [[Paratubal cyst]] (fallopian tube)
* [[Pilonidal cyst]] (skin infection near tailbone)
* [[Polycystic kidney disease|Renal cyst]] (kidneys)
* [[Polycystic ovary syndrome]]
* [[Radicular cyst]] (associated with the roots of non-vital teeth)
* [[Sebaceous cyst]] (sac below skin)
* [[Tarlov cyst]] (spine)
* [[Vocal fold cyst]]
===Cystic fibrosis===
Despite being described in 1938 as involving the [[microscopic]] appearance of cysts in the pancreas<ref name=Anderson1938>{{cite journal | author = Anderson, D.H. | year = 1938 | title = Cystic fibrosis of the pancreas and its relation to celiac disease | journal = Am J Dis Child | volume = 56 | pages = 344–399}}</ref> [[cystic fibrosis]] is an example of a [[genetic disorder]] whose name is related to fibrosis of the [[cystic duct]] and does not involve actual cysts.<ref>{{cite journal |author=Greenholz SK, Krishnadasan B, Marr C, Cannon R |title=Biliary obstruction in infants with cystic fibrosis requiring Kasai portoenterostomy |journal=J. Pediatr. Surg. |volume=32 |issue=2 |pages=175–9; discussion 179–80 |year=1997 |pmid=9044117|doi=10.1016/S0022-3468(97)90174-3}}</ref>
== Benign vs malignant ==
Many cysts in the body are [[benign]] ([[functional]]), the result of plugged ducts or other natural body outlets for secretions. However, a few are [[tumors]] or are produced within tumors, and are potentially [[cancer|malignant]]:
* [[Dermoid cyst]]
* [[Odontogenic keratocyst|Keratocyst]]
==Related structures==
A [[pseudocyst]] is collection without a distinct membrane.
A [[syrinx (medicine)|syrinx]] in the spinal cord or brainstem is sometimes inaccurately referred to as a cyst.
==References==
{{reflist}}
==External links==
* {{FPnotebook|DER78}}
* [http://www.medicinenet.com/script/main/art.asp?articlekey=55517 "Cyst Symptoms and Causes"] by Melissa Conrad Stöppler, MD and William C. Shiel, Jr., MD, FACP, FACR.
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{{Tumors}}
[[Category:Gross pathology]]
[[cs:Cysta (lékařství)]]
[[de:Zyste]]
[[es:Quiste]]
[[fr:Kyste]]
[[io:Kisto]]
[[it:Cisti (medicina)]]
[[he:ציסטה]]
[[hu:Ciszta]]
[[nl:Cyste]]
[[ja:嚢胞]]
[[no:Cyste]]
[[pl:Torbiel]]
[[ru:Киста]]
[[fi:Kysta]]
[[sv:Cysta]]
[[te:తిత్తి]]
[[th:ซีสต์]]
[[tr:Kist]]