卵巣腫瘍
In the US, the incidence rate in women over 50 is approximately 33 per 100,000. The rate of ovarian cancer between 1993 and 2008 decreased in women of the 40–49 age cohort and in the 50–64 age cohort. Ovarian cancer is most commonly diagnosed after menopause, between the ages of 60 and 64. Ninety percent of ovarian cancer occurs in women over the age of 45 and 80% in women over 50. Older women are more likely to present with advanced ovarian cancer.