Quiste (Cyst) é un saco pechado. O quiste (cyst) pode conter aire, fluídos ou material semisólido. Unha colección de pus chámase absceso, que non é un quiste. O quiste pode ter que ser eliminado cirurxicamente, pero dependerá do seu tipo e localización.
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 ― Bultos asintomáticos que se producen de súpeto entre as articulacións. Se se confirma o diagnóstico de quiste ganglionar, o problema pode resolverse presionando con forza o nódulo para romper o quiste no interior.
Mucocele ― Aparece como un golpe suave nos beizos sen ningún síntoma.
