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. 2016 Aug;9(4):556-9.
doi: 10.1093/ckj/sfw041. Epub 2016 May 26.

Granulomatous interstitial nephritis and Crohn's disease

Affiliations

Granulomatous interstitial nephritis and Crohn's disease

Sjoerd A M E G Timmermans et al. Clin Kidney J. 2016 Aug.

Abstract

Granulomatous interstitial nephritis has been observed in <1% of native renal biopsies. Here, we describe two patients with granulomatous interstitial nephritis in relation to Crohn's disease. Circulating helper and cytotoxic T cells were highly activated, and both cell types predominated in the interstitial infiltrate, indicating a cellular autoimmune response. After immunosuppressive treatment, renal function either improved or stabilized in both patients. In conclusion, granulomatous interstitial nephritis is a genuine extraintestinal manifestation of Crohn's disease, the treatment of which should include immunosuppressive agents.

Keywords: Crohn's disease; T cells; calcineurin inhibitors; granulomatous interstitial nephritis; inflammatory bowel disease.

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Figures

Fig. 1.
Fig. 1.
Renal biopsy revealing granulomatous interstitial nephritis (A; haematoxylin and eosin, 200×). Immunohistochemistry staining revealing a predominant T cell infiltrate (B; CD3, 200×), consisting of both T-helper cells (C; CD4, 200×) and cytotoxic T cells (D; CD8, 200×). Of note, neither crystals nor polarized material was observed.

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