These are small fluid filled sacs, found in the surface or inside the ovaries. These can also be considered as the growth (>2cm) of an ovarian follicle. It is the case with most of the women; and when present in body, it causes no discomfort, harm or pain. Most of them are functional, not being a part of any disease. Some examples of ovarian cysts are follicular cyst, corpus luteum cyst, hemorrhagic cyst and dermoid cyst. These cysts are often diagnosed by either ultrasound or CT scan. As this is benign type of cancer, it can be treated by knowing the stage and size of the cyst.