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A.D.A.M. Medical Encyclopedia [Internet]. Atlanta (GA): A.D.A.M.; 2013.

A.D.A.M. Medical Encyclopedia.

Ovarian cysts

Physiologic ovarian cysts; Functional ovarian cysts; Corpus luteum cysts; Follicular cysts

Last reviewed: March 11, 2014.

An ovarian cyst is a sac filled with fluid that forms on or inside an ovary.

This article is about cysts that form during your monthly menstrual cycle, called functional cysts. Functional cysts are not the same as cysts caused by cancer or other diseases.

Causes

Each month during your menstrual cycle, a follicle grows on your ovary. The follicle is where an egg is developing. Most months, an egg is released from this follicle, called ovulation. If the follicle fails to break open and release an egg, the fluid stays in the follicle and forms a cyst. This is called a follicular cyst.

Another type of cyst occurs after an egg has been released from a follicle. This is called a corpus luteum cyst. This type of cyst often contains a small amount of blood.

Ovarian cysts are more common the in childbearing years between puberty and menopause. The condition is less common after menopause.

Taking fertility drugs can cause a condition in which multiple large cysts are formed on the ovaries. This is called ovarian hyperstimulation syndrome. The cysts most often go away after a woman's period, or after a pregnancy.

Functional ovarian cysts are not the same as ovarian tumors, or cysts due to hormone-related conditions such as polycystic ovary syndrome.

Symptoms

Ovarian cysts often cause no symptoms.

An ovarian cyst is more likely to cause pain if it:

  • Becomes large
  • Bleeds
  • Breaks open
  • Interferes with the blood supply to the ovary
  • Is bumped during sexual intercourse
  • Is twisted or causes twisting (torsion) of the Fallopian tube

Symptoms of ovarian cysts can also include:

  • Bloating or swelling in the abdomen
  • Pain during bowel movements
  • Pain in the pelvis shortly before or after beginning a menstrual period
  • Pain with intercourse or pelvic pain during movement
  • Pelvic pain -- constant, dull aching
  • Sudden and severe pelvic pain, often with nausea and vomiting, may be a sign of torsion or twisting of the ovary on its blood supply, or rupture of a cyst with internal bleeding

Changes in menstrual periods are not common with follicular cysts, and are more common with corpus luteum cysts. Spotting or bleeding may occur with some cysts.

Exams and Tests

Your doctor or nurse may discover a cyst during a pelvic exam, or when you have an ultrasound test for another reason.

Ultrasound may be done to diagnose a cyst. Your doctor or nurse may want to check you again in 6 - 8 weeks to make sure it is gone.

Other imaging tests that may be done when needed include:

The following blood tests may be done:

Treatment

Functional ovarian cysts often do not need treatment. They often go away on their own within 8 - 12 weeks.

If you have frequent cysts, your doctor or nurse may prescribe birth control pills (oral contraceptives). These medicines may reduce the risk of new ovarian cysts. Birth control pills do not decrease the size of current cysts.

Surgery to remove the cyst or ovary may be needed to make sure that it is not ovarian cancer. Surgery is more likely to be needed for:

  • Complex ovarian cysts that do not go away
  • Cysts that are causing symptoms and do not go away
  • Simple ovarian cysts that are larger than 10 centimeters
  • Women who are near menopause or past menopause

Types of surgery for ovarian cysts include:

You may need other treatments if you have polycystic ovary syndrome or another disorder that can cause cysts.

Outlook (Prognosis)

Cysts in women who are still having periods are more likely to go away. A complex cyst in a woman who is past menopause has a higher risk of being cancer. Cancer is very unlikely with a simple cyst.

Possible Complications

Complications have to do with the condition causing the cysts. Complications can occur with cysts that:

  • Bleed
  • Break open
  • Show signs of changes that could be cancer
  • Twist

When to Contact a Medical Professional

Call your health care provider if:

  • You have symptoms of an ovarian cyst
  • You have severe pain
  • You have bleeding that is not normal for you

Also call your health care provider if you have had following on most days for at least 2 weeks:

  • Getting full quickly when eating
  • Losing your appetite
  • Losing weight without trying

Prevention

If you are not trying to get pregnant and you often get functional cysts, you can prevent them by taking hormone drugs (such as birth control pills). These medicines prevent follicles from growing.

References

  1. Katz VL. Benign gynecologic lesions. In: Lobo RA, Gershenson DM, Katz VL, eds. Comprehensive Gynecology. 6th ed. Philadelphia, Pa: Mosby Elsevier; 2012:chap 18.
  2. Bulun SE. The physiology and pathology of the femalereproductive axis. In: Melmed S, Polonsky KS, Larsen PR, Kronenberg HM, eds. Williams Textbook of Endocrinology. 12th ed. Philadelphia, Pa: Saunders Elsevier; 2011:chap 17.

Review Date: 3/11/2014.

Reviewed by: Susan Storck, MD, FACOG, Chief, Eastside Department of Obstetrics and Gynecology, Group Health Cooperative of Puget Sound, Bellevue, Washington; Clinical Teaching Faculty, Department of Obstetrics and Gynecology, University of Washington School of Medicine. Also reviewed by David Zieve, MD, MHA, Isla Ogilvie, PhD, and the A.D.A.M. Editorial team.

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The information provided herein should not be used during any medical emergency or for the diagnosis or treatment of any medical condition. A licensed medical professional should be consulted for diagnosis and treatment of any and all medical conditions. Call 911 for all medical emergencies. Links to other sites are provided for information only — they do not constitute endorsementscof those other sites. © 1997–2011 A.D.A.M., Inc. Any duplication or distribution of the information contained herein is strictly prohibited.

Copyright © 2013, A.D.A.M., Inc.

A.D.A.M., Inc. is accredited by URAC, also known as the American Accreditation HealthCare Commission (www.urac.org). URAC's accreditation program is an independent audit to verify that A.D.A.M. follows rigorous standards of quality and accountability. A.D.A.M. is among the first to achieve this important distinction for online health information and services. Learn more about A.D.A.M.'s editorial policy, editorial process and privacy policy. A.D.A.M. is also a founding member of Hi-Ethics and subscribes to the principles of the Health on the Net Foundation (www.hon.ch).

The information provided herein should not be used during any medical emergency or for the diagnosis or treatment of any medical condition. A licensed medical professional should be consulted for diagnosis and treatment of any and all medical conditions. Call 911 for all medical emergencies. Links to other sites are provided for information only — they do not constitute endorsementscof those other sites. © 1997–2011 A.D.A.M., Inc. Any duplication or distribution of the information contained herein is strictly prohibited.

Copyright © 2013, A.D.A.M., Inc.

What works?

  • Oral contraceptives to treat cysts of the ovaryOral contraceptives to treat cysts of the ovary
    Women of reproductive age usually release an egg about once a month. The ovary gets an egg from the inside of the ovary to its surface by creating a blister or fluid‐filled space around the developing egg. When the blister (or cyst) reaches the surface of the ovary, it bursts and releases the egg into the abdominal cavity. After this occurs, the blister can develop into another type of cyst, which makes a hormone (progesterone) that helps the pregnancy to grow. Most of these cysts come and go without problems. Sometimes, however, the cysts get large or painful; others may remain for months. Several decades ago, health care providers learned that women taking birth control pills had fewer cysts, since the pills usually kept an egg from being released. Based on this fact, many clinicians started treating these cysts with birth control pills to make them go away faster.
See all (10) ...

Figures

  • Female reproductive anatomy.
    Ovarian cysts.
    Uterus.
    Uterine anatomy.

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