Hi, Anki!
I have a 5x10mm colloid cyst that I have also chosen to monitor, though my doctors have said they will remove it when I am ready. They found it last April and had another MRI in October. No growth, and still just mild hydrocephalus showing in my left ventricle. My symptoms are currently mild. It does make me nervous to wait, but I am more nervous about surgery.
I'm trying to get a referral to see the surgeons at UPMC in Pittsburg, PA. They do a special kind of endoscopic surgery that is less invasive than craniotomy and I am hoping I will be a good candidate for that. I wonder if anyone in Canada also does something similar, if that would be an option for your case. I know some cases require craniotomy in order to get all of the cyst removed.
How are you feeling?