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Light microscopy images showing pathological lesions found in acute tubular necrosis (Panels A-D) and acute interstitial nephritis (Panels E-F), 40x magnification. Panel (A) Hydropic degeneration of the kidney tubules. Panel (B) Vacuolization of the cytoplasm of the tubular epithelial cells. Panel (C) Cell detachment and the presence of detached cells in the lumen of the tubules. D Dilation of the tubules. E and F) Leukocytes infiltrating the interstitial area
