Ovarian cyst greater than 7 cm at any age warrants further imaging with MRI or surgical evaluation. I personally have never encountered an ovarian cyst measuring 19 cm, although the following case report sounds similar to your daughter's case:
Oh my goodness. I am sorry to hear that. I'm a mom of a 14 year old too. That has to be very terrifying. What did the doctor say? She does seem very young to have this diagnosis and a cyst of that size. Did she have surgery and a biopsy to remove? How is she doing? Hugs.
Hi there, I'm sorry to hear about your daughter's situation, she must be going through a lot of pain at such a young age. It is really difficult to bear the pain even if you have a small cut it must be really hard for her to cope up with her condition.
Have you discussed with her doctor, what will be best for her. I think surgery is the best option to remove the cyst and there are very low chances that cyst can return again.
As per my advice consulting with her doctor regarding the best option for the treatment to get rid of the lump asap. Btw what is the situation of your daughter recently? Is she doing well, has she gone through the surgery or has the doctor suggested to go with the medications only?