Ultrasound images Xanthogranulomatous pyelonephritis (XGP)
This ultrasound images condition (which gets its name from the yellow colour of the kidney) is the result of renal obstruction by calculi in the pelvicalyceal system. Frequently, a staghorn calculus is responsible. The kidney becomes chronically infected and the calyces enlarge and become filled with infected debris. The cortex may be eroded and thin (Fig.ultrasound images below).
ultrasound images of Xanthogranulomatous pyelonephritis. Numerous stones have obstructed the PCS, which contains debris. The renal cortex is thin, and the architecture of the kidney is difficult to recognize On ultrasound, these appearances are similar toTB or to a pyonephrosis. The latter is usually accompanied by a more severe, acute pain and fever whereas XGP or TB has a lower-grade, chronic pain. CT may differentiate TB from XGP and is also more sensitive to extrarenal spread of disease.
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