When the sonographer pointed out that my bub had one kidney mildly enlarged it panicked me and to be honest still does. But my Obs said that in most cases these sonographers mention even the slightest things in their reports to avoid any legal action. They are usually over sensitive. Which is good in a way but it's horrible that it makes us girls worry though! think of it this way, if that is how closely they looked at your scans and that is all they had to say then you and bub are doing amazingly well!