Hi,Thanks for your answer. I am 16 year old and i very upset about it:-(
I wish there was a simple answer for you, but you will need more tests and possibly surgery to remove the complex cyst. This ultrasound report is just one piece of research for you, and you will need more investigations and go over your history. Things like your age and symptoms are all part of the picture.
It may be just a benign thing, so don't panic yet. Just follow up with the doctors.