Hello,
I came across you post.
I have been looking for feedback/information and I am able to talk about colloid cysts in the 3rd ventricle.
I had a unexpected reoccurrence and had mine removed for a second time at the beginning of March. You are young to have a colloid cyst. They are very rare with varying symptoms. The treatment is surgery and a likely good outcome. If you would like to know more I am happy to help. I may be able to answer some of the questions you have and understand a little what you are going through. Good luck in the meantime.