Hi Darmeen,
First, I'd like to say congrats on your pregnancy!!!! I hope it goes well.
Second I wanted to say that Sophie had the exact same thing on my 21 week ultrasound! I was beside myself with worry. As you did, I researched the heck out of it when I got home. Sometimes too much information is NOT a good thing. I read that in the US doctors don't even tell mothers about these cysts since they usually turn out to be nothing.
Back to Sophie's story: My doctor told me it's nothing and not to worry (as if). She had the geneticists at Markham Stouffville Hospital look at the ultrasound before my followup appointment. They look for other markers of development in the ultrasound to see if there was cause to worry. In our case they said the baby was developing fine. Most likely it was just an area with fluid on her brain that would drain when she started growing. My doctor wouldn't even do another ultrasound to see if the fluid dispersed or not. That's how fine she was with it! I was still scared out of my mind! When Sophie was born at MSH, they did an ultrasound on her head on Day 2. There was no sign of the cyst or any other damage! I was sooooo thankful and relieved. Sophie is developing really well and the scare seldom enters my mind. If you have any questions just call me (I think you already have my number or email me). I'm sure your docto is doing the right thing. You and baby will do well.
Merry Christmas to you and Xavier too!
Randi
P.S. My research said mostly boys have this cyst but Sophie obviously isn't a boy!