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A Corpus luteum cyst is a type of ovarian cyst which may rupture about the time of menstruation, and take up to three months to disappear entirely. A corpus luteum cyst rarely occurs at age 50+, because eggs are no longer being produced in menopausal women. Corpus luteum cysts may contain blood and other fluids. The physical shape of a corpus luteum cyst may appear as an enlargement of the ovary itself, rather than a distinct mass -like growth on the surface of the ovary. ==Pathophysiology== This type of functional cyst occurs after an egg has been released from a follicle. The follicle then becomes a secretory gland that is known as the corpus luteum. The ruptured follicle begins producing large quantities of estrogen and progesterone in preparation for conception. If a pregnancy doesn't occur, the corpus luteum usually breaks down and disappears. It may, however, fill with fluid or blood, causing the corpus luteum to expand into a cyst, and stay in the ovary. Usually, this cyst is on only one side, and does not produce any symptoms.〔(【引用サイトリンク】title=Ovarian Cysts: What You Need to Know about an Ovarian Cyst and PCOS )〕〔(【引用サイトリンク】title=Corpus luteum cyst )〕 In women of reproductive age cysts with a diameter of less than 5 cm are common, clinically inconsequential, and almost always a physiological condition rather than a cancer or other disease condition.〔, citing * * * * 〕 In postmenopausal women the threshold for concern is 1 cm.〔 Although ovarian cancer is cystic, it does not arise from benign corpus luteum cysts.〔 Medical specialty professional organizations recommend no follow-up imaging for cysts which are clinical inconsequential.〔 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Corpus luteum cyst」の詳細全文を読む スポンサード リンク
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