<unk>  is a term originally used to describe deposition of calcium salts in the renal parenchyma due to hyperparathyroidism. It is now more commonly used to describe diffuse, fine, renal parenchymal calcification on radiology. During its early stages,<unk>  is visible on x-ray, and appears as a fine granular mottling over the renal outlines. These outlines eventually come together to form a dense mass.
It is most commonly seen as an incidental finding with medullary sponge kidney on an abdominal x-ray.
However, it may be severe enough to cause (as well as be caused by) renal tubular acidosis or even end stage renal failure, due to disruption of the renal tissue by the deposited calcium.
Nephrocalcinosis
Chondrocalcinosis
Osteoporosis
Microcalcification
Carcinomatosis
Albinism
Nephropathy
Xerosis