alexa Tonsillectomy has beneficial effects on remission and progression of IgA nephropathy independent of steroid therapy.
Nephrology

Nephrology

Journal of Nephrology & Therapeutics

Author(s): Maeda I, Hayashi T, Sato KK, Shibata MO, Hamada M,

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Abstract BACKGROUND: Indication of tonsillectomy in IgA nephropathy is controversial. The purpose of this study was to examine the efficacy of tonsillectomy on remission and progression of IgA nephropathy. METHODS: We conducted a single-center 7-year historical cohort study in 200 patients with biopsy-proven IgA nephropathy. Study outcomes were clinical remission defined as disappearance of urine abnormalities at two consecutive visits, glomerular filtration rate (GFR) decline defined as 30\% GFR decrease from baseline and GFR slope during the follow-up. RESULTS: Seventy of the 200 patients received tonsillectomy. Tonsillectomy was associated with increased incidence of clinical remission (P+0.01, log-rank test) and decreased incidence of GFR decline (P=0.01, log-rank test). After adjustment for age and gender, hazard ratios in tonsillectomy were 3.90 (95\% confidence interval 2.46-6.18) for clinical remission and 0.14 (0.02-1.03) for GFR decline. After further adjustment for laboratory (baseline mean arterial pressure, GFR, 24-h proteinuria and hematuria score), histological (mesangial score, segmental sclerosis or adhesion, endocapillary proliferation and interstitial fibrosis) or treatment variables (steroid and renin-angiotensin system inhibitors), similar results were obtained in each model. Even after exclusion of 69 steroid-treated patients, results did not change. GFR slopes in tonsillectomy and non-tonsillectomy groups were 0.60±3.65 and -1.64±2.59 mL/min/1.73 m2/year, respectively. In the multiple regression model, tonsillectomy prevented GFR decline during the follow-up period (regression coefficient 2.00, P=0.01). CONCLUSION: Tonsillectomy was associated with a favorable renal outcome of IgA nephropathy in terms of clinical remission and delayed renal deterioration even in non-steroid-treated patients. This article was published in Nephrol Dial Transplant and referenced in Journal of Nephrology & Therapeutics

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