![](http://up.wiki.x.io/wikipedia/commons/thumb/9/9b/Nephrocalcinosis.jpg/280px-Nephrocalcinosis.jpg)
Significant bilateral nephrocalcinosis (calcification of the kidneys) on a frontal X-ray (radiopacities (white) in the right upper and left upper quadrant of the image), as seen in distal renal tubular acidosis.
Photo credit: public domain
Photo credit: public domain