Epidemiology, Diagnosis, Medical Care and Prognosis of Tubulointerstitial Nephritis: Results of a Multicenter Retrospective Cohort Study

Overview

Tubulointerstitial nephritis (TIN), diagnosed on kidney biopsy, represents a common cause of kidney failure. The etiologies are multiple but the diagnosis of the causative disease is sometimes difficult and the treatment is not completely codified. The research focuses on the characterization of TIN on the etiological, clinical, biological, therapeutic and prognostic levels in order to improve patient care. For this purpose, kidney biopsies performed for the diagnosis, kept in a biological collection within the biological resource platforms of the Necker-Enfants Malades hospital and the Georges Pompidou hospital will be centrally reviewed, blinded to the final diagnosis.

Tubulointerstitial nephritis (TIN) is defined as a diverse set of renal pathologies caused by a primary lesion of the interstitial compartment, which most often extends to the associated tubular structures. Renal histology establishes the diagnosis by objectifying different types of lesions associated to varying degrees depending on the etiology and clinical course. These lesions are: an interstitial inflammatory infiltrate whose nature is largely dependent on the etiopathogenic mechanisms of the lesion, diffuse or multifocal interstitial fibrosis, tubular epithelial lesions in the form of tubulitis and/or tubular atrophy. Research focuses on the characterization of TIN on the etiological, clinical, biological, therapeutic and prognostic levels in order to try to improve patient care. For this: * 1st step: native kidney biopsies performed to establish the diagnosis and kept in a biological collection within the biological resource platforms of the Necker-Enfants Malades hospital and the Georges Pompidou hospital will be centrally reviewed The review will be performed at the Pathology department of Necker hospital, blinded to the final diagnosis for selection of the biopsies that will be included in the study. Included biopsies will be those with tubulointerstitial nephritis retained as the main cause of renal dysfunction after etiological investigation * 2nd step: collection of clinical and biological data regarding the diagnosis, management and prognosis * 3rd step: statistical analysis of the data and consolidation of the results.

Conditions