KATERYNA KON / SCIENCE PHOTO LIBRARY KATERYNA KON / SCIENCE PHOTO LIBRARY
Comparison of gross anatomy of acute and chronic pyelonephritis, illustration. There are small abscesses (yellow) on the surface of the kidney with acute pyelonephritis (left). The kidney with chronic pyelonephritis (right) has an irregular scarred cortical surface, dilated and blunted calyces (yellow), and a dilated ureter.
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