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Novel-Catin, Etienne; Pelletier, Solenne; Fouque, Denis; Roux, Jean-Paul; Chapurlat, Roland; D'Haese, Patrick; Behets, Geert; Evenepoel, Peter; Nickolas, Thomas L.; Lafage-Proust, Marie-Hélène
Bone (New York, N.Y.), 09/2020, Letnik: 138Journal Article
Histomorphometric analysis of a transiliac bone biopsy is the gold standard for the diagnosis of renal osteodystrophy (ROD). This procedure is costly, invasive and usually performed with a trephine with an internal diameter of 7.5 mm. Our objective was to evaluate the accuracy of ROD diagnosis on halved histological bone sections to determine if they are comparable to the standard 7.5 mm samples. We included 68 bone biopsies performed in CKD patients for diagnostic purposes with a 7.5 mm diameter trephine. Quantitative histomorphometric analysis of the whole bone samples was performed including assessment of bone mineralization, turnover and volume. Each histological section (representing the whole 7.5 mm diameter biopsy) was then divided lengthwise in two hemisections (representing the 3.5 mm diameter biopsy). Histomorphometric analysis was repeated this time on the two hemibiopsies for each sample, blinded from initial results. Diagnoses were classified as osteitis fibrosa, adynamic bone disease, mixed uremic bone disease, osteomalacia or other. Correlations between the whole sample and the hemibiopsies for each parameter were studied. Concordance between the various bone parameters and final ROD diagnosis obtained from the whole section versus the two hemi sections was evaluated. Highly significant correlations were found between parameters measured on the whole section and the corresponding hemisections, with r coefficient of 0.98 for osteoid surface and thickness and bone formation rate, 0.97 for osteoclast surface, and 0.96 for bone volume (p < 0.001). Final diagnosis was in full accordance between the whole biopsy and the two corresponding hemi-biopsies in 91% of cases. Accurate diagnosis of ROD type was obtained by evaluation of bone surface areas of 3 mm diameter. These data suggest that small invasive bone biopsies might provide accurate ROD diagnostics while decreasing both invasiveness and cost of the procedure. •Renal osteodystrophy (ROD) is associated with increased cardiovascular and fracture risks.•A bone biopsy is the only tool for accurate diagnosis of ROD.•7 mm-wide bone biopsies are invasive and less and less available worldwide.•Halved bone samples (3 mm) yield accurate diagnosis compared to full samples (7.5 mm).•Smaller trephines should be evaluated for less invasive and cheaper ROD management.
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in: SICRIS
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