Abstract
Two cases of sarcoidosis with interstitial nephritis (lymphocytic and granulomatous) are described. In contrast to the majority of reported cases, patients simultaneously exhibited renal failure and multiple extrarenal manifestations, including bone marrow granulomas. Pretreatment gallium-67 gamma scan of the kidneys produced negative results. Patients were treated with steroids. Treatment resulted in a normal renal function after 1 year in the patient with lymphocytic interstitial nephritis. Renal function improved in the patient with granulomatous interstitial nephritis, and a second renal biopsy performed 13 months after diagnosis revealed granuloma disappearance and residual interstitial fibrosis. These cases provide evidence that interstitial nephritis in sarcoidosis may appear simultaneously with multiorgan involvement. The absence of gallium-67 renal intake does not guarantee that the disease is not active in the kidneys.
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