Assertion: xanthogranulomatous pyelonephritis | /r/HasProperty | rare variant of cp
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Source sentences:
text: Xanthogranulomatous pyelonephritis (XGP) is a rare variant of CP and may be associated with longstanding obstructive urinary tract disorders and Proteus infection .
text: Xanthogranulomatous pyelonephritis is a rare form of pyelonephritis that is almost always associated with chronic obstruction (eg, from staghorn calculus [75% of cases], other calculus, stricture, or tumor).
text: Xanthogranulomatous pyelonephritis is a rare type of pyelonephritis.