* * *a fluid-filled sac, one or more of which may develop in the ovary. Although most ovarian cysts are not malignant, they may reach a very large size, causing gross swelling of the abdomen and pressure on surrounding organs. The cyst may rotate on its stalk, thus cutting off its blood supply and causing severe abdominal pain and vomiting. In this case the cyst requires urgent surgical removal. Ovarian cysts that do become malignant may not be recognized until the tumour has advanced to a stage where treatment may be unsuccessful in eradicating the cancer. Screening programmes, based on ultrasound techniques, have been introduced in some areas to assist with the early detection of ovarian cysts and tumours.
* * *a cyst of the ovary proper.
Endovaginal image of ovary containing several abnormally large cysts, including one with a fluid-filled level (arrows) indicating internal hemorrhage.
Medical dictionary. 2011.
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