Assertion: chronic pyelonephritis | /r/HasProperty | caused
Facets:
value: usually
type: DEGREE
value: by relapsing ascending urinary tract infections
type: MANNER
Source sentences:
text: Chronic pyelonephritis is a chronic relapsing inflammatory destruction of renal tissue (chronic tubulo-interstitial nephritis) and is usually caused by relapsing ascending urinary tract infections (acute pyelonephritis).