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case_images: Pathologic examination of the renal biopsy specimen showing normocellular
  glomeruli (periodic acid-Schiff staining; 20x).
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case_images: The histopathologic examination of the biopsy specimen revealed normocellular glomeruli (Figure 1).
case_images: Histopathologic analysis of renal biopsy showing mononuclear inflammatory
  cells. The arterial wall abnormalities were absent (hematoxylin and eosin
  staining; 20x).
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case_images: An interstitial inflammatory infiltrate composed of mononuclear cells was present, with no pathologic alterations in the arteries (Figure 2).
case_images: Pathologic examination of the biopsy specimen showing interstitial
  inflammation and edema (hematoxylin and eosin staining; 20x).
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case_images: Patchy interstitial edema along with inflammation was also identified (Figure 3).
case_images: Histopathology of renal biopsy demonstrating interstitial edema with no
  mitotic figures and no tubular necrosis. No evidence of tubulitis or
  granulomas was present (trichrome staining; 20x).
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case_images: The biopsy findings ruled out the presence of mitotic figures and tubular necrosis, with no evidence of tubulitis or granulomas (Figure 4).
case_images: Pathologic examination showing eosinophils, suggestive of acute interstitial
  inflammation (hematoxylin and eosin staining; 20x).
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case_images: The presence of eosinophils was confirmed, which was suggestive of acute interstitial inflammation (Figure 5).