Anyone dealt with this ?

Had any been told their baby has small cyst in brain ? I was told it is very common and most of the time to disappear on their on . I'm so nervous . I had a quad screen test done and they tell me results on Monday. They said everything else is 100% normal and no red flags . So the test is to just cancel out any birth issues :/  I'm 19 weeks pregnant btw and that's when I got my anatomy ultrasound