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Figure 1: Chest radiographs taken (A) 2 weeks before evaluation showing pulmonary infiltrates in the lower regions of both lungs, and (B) during evaluation showing improvement in pulmonary infiltrates on the right side and worsening of infiltrates on the left side.
Figure 2: Chest radiograph taken 6 weeks after initial evaluation showing new pulmonary infiltrates in the right mid-lung zone and worsening infiltrates in the lower lung zones on both sides.
Figure 3: (A) A renal biopsy specimen stained with silver methenamine showing proliferating epithelial cells in a crescent form within the glomerulus (arrow), the characteristic morphology of rapidly progressive glomerulonephritis. (B) Immunofluorescent stain for IgG showing linear staining of the glomerular basement membrane, a sign of antiglomerular basement membrane antibodies.