Hi Doctor, Level II Ultra Sound found a right choroid plexus cyst and enlarged right renal pelvis (4.1mm) at 19 weeks. At 23 weeks, we had a follow up sonogram and the cyst is shrinking measuring 2.5x2 mm. The right renal pelvis measured 3.8 mm and the left 3.3mm. In addition, a mild caliectasis was identified in the left kidney, but no evidence of hydronephrosis. Should I be concerned? I have not heard from my doctor. Is this something that can potentially correct itself. I was told that issues with both kidneys is a marker for down syndrome. Initially we were told about the enlarged kidney, but now there s the issue with the normal kidney. Thank you for your time and feedback.