What is cyst?

A cyst is a closed sac with a distinct membrane and division compared with a neighboring cell. It is a collection of cells that have gathered to create a sac.

A cyst typically contains a gaseous, liquid, or semisolid substance and has a capsule-like outer wall (capsule).

Types

• Ganglion cyst: forms around a tendon, most commonly near the wrist.
• Baker's cyst: in the popliteal area behind the knee that contains joint fluid.
• Dermoid cyst: a benign ovarian tumour.
• Pilonidal cysts: develop in the soft tissue at the base of the lower back's tailbone (coccyx), immediately above the natal cleft (the cleavage between the buttocks)
• Nabothian cyst: a mucus-filled cyst on the surface of the uterine cervix 
• Bartholin's cyst: swelling of small glands around the vaginal opening