<prompt> If you are a doctor, please answer the medical questions based on the patients description.I have Just born baby 2 days, He went for Abdomen KUB scan! the result of scan: IMPRESSION DILATED CALYCEAL SYSTEM IN LEFT KIDNEY LIVER, GB, SPLEEN, PANCREAS, RIGHT KIDNEY BLADDER APPEAL NORMAL, My question is? How my baby get normal kidney function on left kidney?  <response>: Hi...an ultrasound scan doesnt tell you about the function of the kidney. You need a DMS scan for this. A 2 days baby having a dilated pelvicalyceal system means that it is an antenatal HY Chat Doctor. Many of these get better by themselves. If I were your pediatrician all I would do is a renal function testing in the blood and if it is normal I would do follow ultrasound scans once in 3 months to see if its getting better by itself. Regards - 