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ovarian torsion
Ovarian torsion (OT) refers to the rotation of the ovary at its pedicle to such a degree as to occlude the ovarian artery and/or vein.
==Epidemiology==
Ovarian torsion accounts for about 3% of gynecologic emergencies. The incidence of ovarian torsion among women of all ages is 5.9 per 100,000 women, and the incidence among women of reproductive age (15−45 years) is 9.9 per 100,000 women.〔Y〕 In 70% of cases, it is diagnosed in women between 20 and 39 years of age. The risk is greater during pregnancy and in menopause. Risk factors include increased length of the ovarian ligaments, pathologically enlarged ovaries (more than 6 cm), ovarian masses or cysts, and enlarged corpus luteum in pregnancy.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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