Cyst
From Wikipedia, the free encyclopedia
| Cyst | |
|---|---|
| Classification and external resources | |
| MedlinePlus | 003240 |
| MeSH | D003560 |
A 'cyst is a closed sac having a distinct membrane and division on the nearby tissue. It may contain air, fluids, or semi-solid material. A collection of pus is called an abscess, not a cyst. Once formed, a cyst could go away on its own or may have to be removed through surgery.
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[edit] Locations
- Acne cyst - Pseudocysts associated with cystic acne. Actually an inflammatory nodule with or without an associated epidermoid inclusion cyst.
- Arachnoid cyst (between the surface of the brain and the cranial base or on the arachnoid membrane)
- Baker's cyst or popliteal cyst (behind the knee joint)
- Bartholin's cyst
- Breast cyst
- Chalazion cyst (eyelid)
- Colloid cyst
- Crain's backs
- 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))
- 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)
- Liver cystic disease
- Meibomian cyst (eyelid)
- Mucoid cyst (ganglion cysts of the digits)
- Nabothian cyst (cervix)
- Ovarian cyst (ovaries, functional and pathological)
- Paratubal cyst (fallopian tube)
- Periapical cyst (The periapical cyst, otherwise known as radicular cyst, is the most common odontogenic cyst.)
- Peritoneal cyst (lining of the abdominal cavity)
- Pilar cyst (cyst of the scalp)
- Pilonidal cyst (skin infection near tailbone)
- Renal cyst (kidneys)
- Polycystic ovary syndrome
- Pineal gland cyst
- Radicular cyst (associated with the roots of non-vital teeth, also known as Periapical cyst)
- Testical cyst
- Sebaceous cyst (sac below skin)
- Tarlov cyst (spine)
- Trichilemmal cyst - Same as a pilar cyst. A familial cyst of the scalp.
- Vocal fold cyst
[edit] Cystic fibrosis
Despite being described in 1938 as involving the microscopic appearance of cysts in the pancreas[1], 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.[2]
[edit] 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 malignant:
[edit] Related structures
A pseudocyst is collection without a distinct membrane.
A syrinx in the spinal cord or brainstem is sometimes inaccurately referred to as a cyst.
[edit] References
- ^ Anderson, D.H. (1938). "Cystic fibrosis of the pancreas and its relation to celiac disease". Am J Dis Child 56: 344–399.
- ^ Greenholz SK, Krishnadasan B, Marr C, Cannon R (1997). "Biliary obstruction in infants with cystic fibrosis requiring Kasai portoenterostomy". J. Pediatr. Surg. 32 (2): 175–9; discussion 179–80. doi:. PMID 9044117.
[edit] External links
- "Cyst Symptoms and Causes" by Melissa Conrad Stöppler, MD and William C. Shiel, Jr., MD, FACP, FACR.
http://www.ovariancystruptured.com/ a Blog about Ovarian Cysts Rupturing and Prevention by Rebecca Mills
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