Two years ago when I was 21 I had two dermoid cysts removed. The one on my left ovary was 10 cm and I had to have the entire ovary removed. The one on the right ovary was only 4.5 cm and I have most of that ovary left. Recently I've begun having the same symptoms I had before. Stomach pain is the main one. I had apparently had my larger cyst since I was about 17 and didn't know until I had an exam after I was married. My question is, how often do they return? I am having an internal ultrasound tomorrow to see how things looks. Luckily I was able to have a child still, even after the removal of one ovary (I also have many other reproductive issues). Any information would be great. Thanks.