PMC3914247_01
High-power haematoxylin- and eosin-stained renal biopsy before antituberculous treatment demonstrates the presence of a granuloma with caseating central necrosis (white arrow).
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fig1
Histopathology results, however, showed widespread caseating granulomata with Langerhan's cells (Figure 1) consistent with renal tuberculosis.
High-power haematoxylin- and eosin-stained renal biopsy after completion of antituberculous treatment shows tubulointerstitial fibrosis in the absence of caseating granulomas.
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fig2
This confirmed significant tubulointerstitial fibrosis in the absence of any caseating granulomas (Figure 2).