ArticleFrontiers in immunology2025
Case Report: Severe kidney involvement in a case of very early onset inflammatory bowel disease.
Article in Frontiers in immunology, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Background: Patients affected by very early onset inflammatory bowel disease (VEO-IBD) are frequently refractory to standard treatments. Despite the lack of randomized clinical trials, vedolizumab emerged as an effective and safe alternative treatment in VEO-IBD resistant to TNF antagonists. Here, we present a case of VEO-IBD with ulcerative colitis (UC) phenotype developing renal injury after vedolizumab administration. Case presentation: An 11-year-old female patient with VEO-UC was referred to our clinic for fever, nausea, and fatigue. She was treated with vedolizumab for 1 year due to steroid-dependent disease and failure of multiple therapies, including anti-TNF agents. At admission, she was in steroid-free clinical and endoscopic remission, with leukocytosis, increased inflammatory markers, and a rise in serum creatinine. Urine samples revealed persistent leukocyturia over the past 8-10 months with the absence of lower urinary tract symptoms and negative serial urine culture. MRI showed swollen-looking kidneys with bilateral irregular Diffusion-Weighted Imaging (DWI) signal restriction. Kidney biopsy revealed the presence of acute tubular damage with a mixed interstitial inflammatory infiltrate consistent with drug-induced acute tubulointerstitial nephritis (TIN). After prompt start of systemic glucocorticoid therapy and temporary discontinuation of vedolizumab, normalization of renal function and urinalysis was observed. Vedolizumab was restarted after 2 months, pre-medicated with steroids. The follow-up renal biopsy performed after 6 months showed a regression of the histological pattern, with chronic signs characterized by mild tubular atrophy and interstitial fibrosis. Conclusion: Vedolizumab-related acute TIN is a potentially severe complication, rarely described in adult patients. We report the first case of VEO-IBD with a probable vedolizumab-related acute TIN treated with corticosteroids, with a good response and maintenance of vedolizumab. Persisting sterile leukocyturia could represent an early sign.
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