Tsüst (Cyst) on suletud kotike. tsüst (cyst) võib sisaldada õhku, vedelikke või pooltahket materjali. Mädakogumit nimetatakse abstsessiks; see ei ole tsüst. Tsüst võib vajada kirurgilist eemaldamist, kuid see sõltub selle tüübist ja asukohast.
A cyst is a closed sac, having a distinct envelope and division compared with the nearby tissue. Hence, it is a cluster of cells that has grouped together to form a sac (like the manner in which water molecules group together to form a bubble); however, the distinguishing aspect of a cyst is that the cells forming the "shell" of such a sac are distinctly abnormal (in both appearance and behaviour) when compared with all surrounding cells for that given location. A cyst may contain air, fluids, or semi-solid material. A collection of pus is called an abscess, not a cyst. Once formed, a cyst may resolve on its own. When a cyst fails to resolve, it may need to be removed surgically, but that would depend upon its type and location.
Ganglion cyst ― Asümptomaatilised tükid, mis tekivad äkki liigeste vahel. Kui gangliontsüsti diagnoos leiab kinnitust, saab probleemi lahendada, vajutades tugevalt sõlme, et tsüst sees lõhkeks.
Mucocele ― Tundub, et huultel on pehme muhk ilma sümptomiteta.
