Ovarian cysts are fluid-filled sacs that develop ... However, some types of cysts like endometriomas, cystadenomas, and dermoid cysts can be malignant or borderline and tend to grow with age.

Occasionally, a cyst can cause the ovary to twist or it may leak into the abdominal cavity. In rare cases, an ovarian cyst may be cancerous (see Ovarian Cancer). Symptoms: Pain during intercourse ...

A pilonidal cyst, sometimes called pilonidal disease, is a fluid-filled sac that usually occurs on the tailbone at the top of the buttocks. It usually starts as an infection of a hair follicle in the ...

Ingrown hair cysts begin when a hair growing from the follicle curls downward and gets trapped under the skin (instead of growing straight out). Then, a sac-like cyst grows around the ingrown hair, ...