Aih, I understand why you're worried, detail scan findings macam ni memang bikin hati tak tenang! Honestly, choroid plexus cysts are quite common in pregnancy scans and most disappear on their own by 24 weeks like your doc mentioned, so try not to stress too much. A few of my mum friends had similar findings and everything turned out fine when they did the follow-up scan, but I think best to discuss with your doctor at 24 weeks to confirm it's gone and put your mind at ease. In the meantime, take care of yourself and avoid Dr Google lah, it'll just make you more anxious!