A case of acute kidney injury caused by granulomatous tubulointerstitial nephritis associated with sarcoidosis and concomitant presence of anti-glomerular basement membrane antibody.

We encountered a case of granulomatous tubulointerstitial nephritis in a patient with sarcoidosis, who was also found to show an elevated serum titer of anti-glomerular basement membrane (GBM) antibody. The serum creatinine level had been documented to be within normal range 8 months before the first visit. Gallium scintigraphy revealed bilateral kidney uptake, but no uptake in the pulmonary hilum.