Cyst (medicine)

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A cyst or cyst ( ancient Greek κύστις kystis , German , bubble ' ) is one of an epithelial -lined pellicle cavity in the tissue of the body. If this closed tissue pocket is not covered by an epithelial membrane, but only by a connective tissue membrane, it is called a pseudocyst .

The cavity of a cyst can be filled with air ( lung cysts ), tissue fluid, urine ( kidney cysts ), blood, pus ( empyema ), mucus (in cystic fibrosis ), sebum ( atheroma ), pus / sebum ( pustules ) or parasites ( parasite cysts ) .

A cyst can be single or multiple chambers, whereby several small cysts close together can look like one large multiple chamber cyst.

Emergence

Cysts can be congenital or acquired. If the cyst is based on an impairment of drainage, it is called a retention cyst .

Congenital cysts arise from embryonic differentiation defects such as cystic kidneys , cystic lung . In these cases, the respective organ always has a large number of cysts (polycysts).

Acquired cysts result from injuries, infections, or parasite infestations. In these cases, the respective organ usually has only one or a few cysts. However, extensive parasite infestation can also lead to a large number of cysts (see: Polycystic Echinococcosis ).

distance

The surgical removal of a cyst is called a cystectomy , although this term is also used in medicine for the removal of the urinary bladder , even if it is an organ and not a cyst in the above sense.

List of cysts

Web links

Commons : Cysts  - Collection of pictures, videos and audio files
Wiktionary: cyst  - explanations of meanings, word origins, synonyms, translations