In this newest page of my gallery of ultrasound images, I have added some pictures of nephrocalcinosis in neonate. Check: http://www.ultrasound-images.com/ped-abdomen.htm
The images are self explanatory and show a relatively common problem in neonates following long term (weeks or months) of parenteral therapy besides certain medications. On another page, I describe the same disease in adults (see: http://www.ultrasound-images.com/renal-calculi.htm ). But it is in neonates that the pathology is so clearly evident on sonography, the reason being the better visualization of the pediatric abdomen and also the extent of involvement of the kidneys. In fact, it is often difficult to distinguish nephrocalcinosis from renal calculi, so dense is the extent of calcification.