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01.08.2011 | Original Article | Ausgabe 4/2011

Clinical and Experimental Nephrology 4/2011

Japan Renal Biopsy Registry: the first nationwide, web-based, and prospective registry system of renal biopsies in Japan

Zeitschrift:
Clinical and Experimental Nephrology > Ausgabe 4/2011
Autoren:
Hitoshi Sugiyama, Hitoshi Yokoyama, Hiroshi Sato, Takao Saito, Yukimasa Kohda, Shinichi Nishi, Kazuhiko Tsuruya, Hideyasu Kiyomoto, Hiroyuki Iida, Tamaki Sasaki, Makoto Higuchi, Motoshi Hattori, Kazumasa Oka, Shoji Kagami, Michio Nagata, Tetsuya Kawamura, Masataka Honda, Yuichiro Fukasawa, Atsushi Fukatsu, Kunio Morozumi, Norishige Yoshikawa, Yukio Yuzawa, Seiichi Matsuo, Yutaka Kiyohara, Kensuke Joh, Takashi Taguchi, Hirofumi Makino, Committee for Standardization of Renal Pathological Diagnosis and Working Group for Renal Biopsy Database, Japanese Society of Nephrology, Tokyo, Japan
Wichtige Hinweise

Electronic supplementary material

The online version of this article (doi:https://​doi.​org/​10.​1007/​s10157-011-0430-4) contains supplementary material, which is available to authorized users.

Abstract

Background

The Committee for the Standardization of Renal Pathological Diagnosis and the Working Group for Renal Biopsy Database of the Japanese Society of Nephrology started the first nationwide, web-based, and prospective registry system, the Japan Renal Biopsy Registry (J-RBR), to record the pathological, clinical, and laboratory data of renal biopsies in 2007.

Methods

The patient data including age, gender, laboratory data, and clinical and pathological diagnoses were recorded on the web page of the J-RBR, which utilizes the system of the Internet Data and Information Center for Medical Research in the University Hospital Medical Information Network. We analyzed the clinical and pathological diagnoses registered on the J-RBR in 2007 and 2008.

Results

Data were collected from 818 patients from 18 centers in 2007 and 1582 patients from 23 centers in 2008, including the affiliated hospitals. Renal biopsies were obtained from 726 native kidneys (88.8%) and 92 renal grafts (11.2%) in 2007, and 1400 native kidneys (88.5%) and 182 renal grafts (11.5%) in 2008. The most common clinical diagnosis was chronic nephritic syndrome (47.4%), followed by nephrotic syndrome (16.8%) and renal transplantation (11.2%) in 2007. A similar frequency of the clinical diagnoses was recognized in 2008. Of the native kidneys, the most frequent pathological diagnosis as classified by pathogenesis was immunoglobulin (Ig) A nephropathy (IgAN) both in 2007 (32.9%) and 2008 (30.2%). Among the primary glomerular diseases (except IgAN), membranous nephropathy (MN) was the most common disease both in 2007 (31.4%) and 2008 (25.7%).

Conclusions

In a cross-sectional study, the J-RBR has shown IgAN to be the most common disease in renal biopsies in 2007 and 2008, consistent with previous Japanese studies. MN predominated in the primary glomerular diseases (except for IgAN). The frequency of the disease and the clinical and demographic correlations should be investigated in further analyses by the J-RBR.

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