Kisto (Cyst) estas fermita sako. kisto (cyst) povas enhavi aeron, fluidojn aŭ duonsolidan materialon. Kolekto de puso nomiĝas absceso, kiu ne estas kisto. La kisto eble devas esti forigita kirurgie, sed tio dependus de sia tipo kaj loko.
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 ― Senimptomaj buloj, kiuj okazas subite inter artikoj. Se la diagnozo de gangliokisto estas konfirmita, la problemo povas esti solvita premante la nodon forte por krevi la kiston interne.
Mucocele ― Ĝi aperas kiel mola bato sur la lipoj sen ajna simptomo.
