A functional ovarian cyst is a fluid-filled sac that forms on an ovary. A sac normally forms during ovulation to hold a maturing egg. Usually the sac goes away after the egg is released. But if an egg isn't released, or if the sac closes up after the egg is released, the sac can swell up with fluid.
During the normal monthly menstrual cycle, one of two types of functional cysts may form.
Functional ovarian cysts usually are harmless and don't cause symptoms. The larger the cyst is, the more likely it is to cause symptoms. Symptoms may include:
There are many other conditions that cause symptoms like those of a functional ovarian cyst. So it's important to have any unusual pelvic symptoms checked and to have a pelvic exam.
If you see your doctor for pelvic pain or bleeding, you'll be checked for problems that may be causing your symptoms. Your doctor will ask you about your symptoms and menstrual periods.
Your doctor may find an ovarian cyst during a pelvic exam. You may have a pelvic ultrasound to see if the cyst is filled with fluid.
Your doctor may recommend further testing in some cases, such as when the first ultrasound doesn't clearly show what kind of cyst or growth you have. Or other tests may be done if you have moderate to severe pain or vaginal bleeding.
Most functional ovarian cysts go away without treatment. When treatment is needed, the goals are to:
Home treatment with heat and pain medicine can often relieve symptoms.
Treatment with medicines or surgery may be used for a cyst that doesn't go away, looks odd on an ultrasound, or causes symptoms.
Your doctor may suggest that you try birth control pills for several months. They prevent ovulation. This can stop more cysts from forming.
Surgery to remove the cyst (cystectomy) through a small incision (laparoscopy) may be done. This is done if a painful cyst doesn't go away with treatment. If a cyst looks odd on an ultrasound or if you have other risk factors for ovarian cancer, your doctor may recommend surgery to remove the cyst through a larger belly incision (laparotomy).
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