Most cysts are benign.
Endometriomas are common.
cancer is not common. Overall, women
have a 1 in
80 lifetime risk of ovarian
cancer which is one tenth the risk of breast cancer.
Now that statistic is a lifetime risk. That is - when your take all 80 to 90 years
old ladies and look back over their lives. The risk is much lower, the younger you are. So at age 20 the risk of ovarian cancer is very, very small. At age 40 to 50
the risk is probably 1 in 1000. By age 80 , it is 1 in 80.