Wiktionary
interstitial nephritis
n. (context pathology English) a kidney disorder in which the interstitial spaces between the kidney tubules become inflamed
Wikipedia
Interstitial nephritis
'''Interstitial nephritis ''' (or tubulo-interstitial nephritis) is a form of nephritis affecting the interstitium of the kidneys surrounding the tubules. This disease can be either acute, meaning it occurs suddenly, or chronic, meaning it is ongoing and eventually ends in kidney failure.
Usage examples of "interstitial nephritis".
It has been used in the treatment of pneumonia, peritonitis, and other sthenic fevers, but is chiefly useful in chronic diseases, such as arterio-sclerosis and interstitial nephritis.