Cyst behind uterus causing pain-21 years old. Family history of ovarian cancer.

[coty]

My daughter, also 21, has pelvic pain on her left side, lower back pain, nausea, pain and pressure when wiping, and painful sex. She's been on bc for 2 years however she grew a lemon size cyst behind her uterus. After getting a sonogram, Her Gyno says it's simple and prob their because she's ovulating. Wants her to stay on the pill and check again in three months. Why would she grow one if she is on bc? Why has it grown so big? Her grandma died of ovarian cancer. Should we get a second opinion? Worried.

[old_before_my_time]

Ovarian cysts are a normal part of the menstrual cycle but it's not unusual for them to hang around longer than normal and they can get rather large. A lemon-sized one isn't all that big and its good it's a simple cyst. Ultrasounds can usually give a fairly good indication if the cyst is concerning or not. But even complex ones are usually benign. Doing another u/s in 2 or 3 months is pretty standard. There is some controversy as to whether BC pills are helpful in preventing cysts or not.

With her family history of ovarian cancer (grandma), it's good to be vigilant for any symptoms of this often silent killer. If you are not comfortable with her doctor's care, you should seek a second opinion. A gynecologic oncologist would be your best bet.