wow. this is literally the 4th or 5th post yet this week about this same thing. i hope that gives you some comfort about just how common finding these are becoming. i don't have any experience with them, but the general consensus seems to be that doctors are able to find them more due to the high quality of the u/s machines these days. good luck to you guys, and try to relax. i'm sure it will resolve itself.
I was going to say the same thing. Between this board and my BMB, I have seen a ton of these posts lately.
My DS1 also had a choroid plexus cyst on his brain at my A/S. Every OB handles it differently, my tech actually pointed it out but also stated that he had zero other markers and the fact that he was opening his hands ruled out anything being wrong. OB said he was going to be perfectly fine. These cysts are very common and without any other markers sometimes OBs won't even mention it to you, some mention it but don't require further action, and some do some more testing just in case, but really, your LO is going to be fine. I know it's hard not to worry.