An<unk>  is 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<unk> .  An<unk>  can be as small as a pea, or as large as a grapefruit.
Most<unk> s are functional in nature, and harmless (benign).  In the US<unk> s are found in nearly all premenopausal women, and in up to 14.8% of postmenopausal women.  The incidence of ovarian carcinoma is approximately 15 cases per 100,000 women per year.<unk> s affect women of all ages.  They occur most often, however, during a woman's childbearing years.
Some<unk> s cause problems, such as bleeding and pain.  Surgery may be required to remove those<unk> s.
Ovarian cyst
Ovarian Sarcoma
Ovarian fibroma
Epithelial ovarian tumors
Ovarian torsion
Ectopic pregnancy
Testicular cyst
Hysteria