AskDefine | Define cyst

Dictionary Definition



1 a closed sac that develops abnormally in some body structure
2 a small anatomically normal sac or bladderlike structure (especially one containing fluid) [syn: vesicle]

User Contributed Dictionary



From cystis, from κύστησ



  1. A pouch or sac without opening, usually membranous and containing morbid matter, which develops in one of the natural cavities or in the substance of an organ.


sac which develops in the natural cavities of an organ

Old English


. Cognate with Old Saxon cust (Dutch kust), Old High German chust.






Extensive Definition

A cyst is a closed sac having a distinct membrane and division on the nearby 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.


Cystic fibrosis

Despite being described in 1938 as involving the microscopic appearance of cysts in the pancreas 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.

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:

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.


External links

cyst in Czech: Cysta (lékařství)
cyst in German: Zyste
cyst in Spanish: Quiste
cyst in French: Kyste
cyst in Ido: Kisto
cyst in Italian: Cisti (medicina)
cyst in Hebrew: ציסטה
cyst in Hungarian: Ciszta
cyst in Dutch: Cyste
cyst in Japanese: 嚢胞
cyst in Norwegian: Cyste
cyst in Polish: Torbiel
cyst in Russian: Киста
cyst in Finnish: Kysta
cyst in Swedish: Cysta
cyst in Telugu: తిత్తి
cyst in Thai: ซีสต์
cyst in Turkish: Kist

Synonyms, Antonyms and Related Words

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