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What is Xanthogranulomatous pyelonephritis associated stones are due to infection with? and explain in detail?
ANSWER: (A) ProteusREF: Tarascon Pocket Urologica by Pamela Ellsworth page 8"Xanthogranulomatous pyelonephritis is a chronic condition of the kidney resulting in diffuse renal destruction, a grossly enlarged and nonfunctioning kidney associated with nephrolithiasis. It is thought to start with obstruction (stone or sloughed papilla) followed by infection (most commonly Proteus)"