Ovarian cysts

Injury	Disease	Nutrition	Poison

Symptoms	Surgery	Test	Special Topic

Female reproductive anatomy

Ovarian cysts

Definition:

Ovarian cysts are sacs filled with fluid or a semisolid material that develops on or within the ovary.

Alternative Names:
Physiologic ovarian cysts; Functional ovarian cysts
Causes, incidence, and risk factors:

Typically, ovarian cysts are functional (not disease related) and disappear on their own. During the days preceding ovulation, a follicle grows. At the time of expected ovulation, the follicle fails to rupture and release an egg.

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Instead of being reabsorbed, the fluid within the follicle persists and forms a cyst. Functional cysts usually disappear within 60 days without treatment and are relatively common. They occur most often during childbearing years (puberty to menopause), but may occur at any time. No known risk factors have been identified.

Functional ovarian cysts are not to be confused with other disease conditions involving ovarian cysts, specifically benign cysts of different types that must be treated to resolve, true ovarian tumors (including ovarian cancer), or hormonal conditions such as polycystic ovarian disease.