Brain cyst

I went in for a routine growth scan today at 32+6 and they discovered a cyst on my baby’s brain. This seems odd to me because I generally see people discussing this finding after their anatomy scan. Has anyone experienced it this late in pregnancy? The doctor told me everything else was fine and not to be concerned, but still said we could do an MRI. It’s really hard to not be concerned right now and I’m having trouble finding any stories online of people who experienced the same thing.