Enclosed in a cyst.

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.

plural of cyst

simple past tense and past participle of cyst and decease

(pathology) A type of teratoma or tumour, usually benign. It is in the form of a cyst or sac, and contains skin and sometimes hair, nails, teeth or other tissue.

(pathology) A swelling on or around joints and tendons in the hand or foot.

(humorous) form of cease and desist: stop.

(medicine) A fluid-filled cyst near the vagina, caused by the blockage of a Bartholin's gland.

An ovarian cyst containing old brown blood, usually, but not always, associated with endometriosis.

Any collection of fluid, surrounded by a very thin wall, within an ovary; any ovarian follicle that is larger than about two centimeters is termed an ovarian cyst.