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      Renal outcomes and clinical course of nondiabetic renal diseases in patients with type 2 diabetes

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          Abstract

          Background/Aims

          In several recent studies, renal biopsies in patients with type 2 diabetes and renal disease have revealed a heterogeneous group of disease entities. Our aim was to study the prognosis and clinical course of nondiabetic renal disease (NDRD) and to determine risk factors for NDRD in patients with type 2 diabetes.

          Methods

          Renal biopsy reports of 110 patients with type 2 diabetes who were seen at Kyung Hee University Medical Center and Kyung Hee University Hospital at Gangdong, Seoul, Korea between January 2000 and December 2011 were retrospectively analyzed.

          Results

          Of 110 patients with type 2 diabetes, 41 (37.3%) had diabetic nephropathy (DN), 59 (53.6%) had NDRD, and 10 (9.1%) had NDRD superimposed on DN. Immunoglobulin A nephropathy (43.5%) was the most common NDRD. Patients with NDRD had a shorter duration of diabetes, lower frequency of diabetic retinopathy, and better renal outcomes, which might have resulted from the use of aggressive disease-specific treatments such as steroids and immunosuppressants in patients with NDRD.

          Conclusions

          Compared with DN, NDRD was associated with better renal outcomes in patients with type 2 diabetes, as evidenced by a higher cumulative renal survival rate and lower rate of end-stage renal disease (ESRD). Shorter duration of diabetes and absence of retinopathy were independent predictors of NDRD in patients with type 2 diabetes and renal involvement. Renal biopsy is recommended for patients with type 2 diabetes and risk factors for NDRD, to obtain an accurate diagnosis, prompt initiation of disease-specific treatment, and ultimately better renal outcomes with the avoidance of ESRD.

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          Changing prevalence of glomerular diseases in Korean adults: a review of 20 years of experience.

          Jae Chang, Dong Ki Kim, Hyun Kim … (2009)
          The prevalence of glomerular diseases differs according to geographic area, race, age and indications for a renal biopsy. This study was conducted to evaluate the distribution and changing patterns of renal diseases during the past 20 years in a large patient population in Korea. Patients aged 16 years or older who underwent a renal biopsy at Severance Hospital in the Yonsei University Health System from 1987 to 2006 were enrolled. All medical records were reviewed retrospectively. In total, 1818 patients (M:F = 1.02:1) were reviewed. Glomerulonephritis (GN) comprised 85.9% of the total biopsied cases. The most common primary GN was IgA nephropathy (IgAN) (28.3%), which was followed by minimal change disease (MCD) (15.5%), membranous nephropathy (MN) (12.3%), focal segmental glomerulosclerosis (FSGS) (5.6%) and membranoproliferative GN (MPGN) (4.0%). The most common secondary GN was lupus nephritis (8.7%). The most common idiopathic nephrotic syndrome was MCD (38.5%), which was followed by MN and IgAN. Among 128 (7.4%) patients who were HBsAg-positive, MN (30.5%) and MPGN (21.1%) were the most common GN. When the incidence rates between 1987-91 and 2002-06 were compared, IgAN increased from 25.6 to 34.5%, while MCD (from 23.2 to 7.0%) and MPGN (from 6.7 to 1.7%) decreased significantly (P < 0.01). IgAN was the most common primary GN, and MCD was the most common cause of nephrotic syndrome. In the 5-year quartile comparison, the relative frequency of IgAN increased, while the relative frequency of MCD and MPGN decreased significantly during the past 20 years.
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            Changing incidence of glomerular diseases in adults.

            Angelo Ucci, Frank J. Mulhern, H. O’Shea … (2000)
            Studies performed at large metropolitan medical centers have reported an increasing incidence of idiopathic focal segmental glomerulosclerosis (FSGS) in adults. To determine whether a similar trend occurs in small urban and rural communities and to determine the role of race in these observations, we reviewed the patient records of all adults who underwent renal biopsies at our institution over the 20-year period from 1974 to 1994. The patients were grouped for analysis in 5-year intervals, 1975 to 1979, 1980 to 1984, 1985 to 1989, and 1990 to 1994, for the following diagnoses: FSGS, membranous nephropathy (MN), minimal change nephropathy (MCN), membranoproliferative glomerulonephritis (MPGN), immunoglobulin A (IgA) nephropathy, chronic glomerulonephritis, diabetic nephropathy, hypertensive nephrosclerosis, and chronic interstitial nephritis. Patients with secondary causes for these lesions were excluded. The relative frequency of FSGS increased from 13.7% during 1975 to 1979 to 25% during 1990 to 1994 (P < 0.05). The relative frequency of MN decreased from 38.3% during 1975 to 1979 to 14.5% during 1990 to 1994 (P < 0.01). There were no changes in the frequencies of MCN, MPGN, IgA nephropathy, chronic glomerulonephritis, diabetic nephropathy, hypertensive nephrosclerosis, or chronic interstitial nephritis over the 20-year period. However, there was a significant increase in the percentage of blacks with FSGS, from 0% in 1975 to 1979 to 22.6% in 1990 to 1994, and an increased percentage of Hispanics with FSGS, from 0% in 1975 to 1979 to 21.3% in 1990 to 1994 (P < 0.05). The modest increase in whites with FSGS did not reach statistical significance. The incidence of MN in blacks and whites decreased over the 20-year period. In the last 5 years, 15 patients per year had FSGS compared with 7 patients per year with MN (P < 0.05). No changes in age or sex between groups or over time accounted for these results. We conclude that FSGS is now diagnosed twice as often as MN and is the most common idiopathic glomerular disease at our hospital. Reasons for this increase include the emergence of FSGS in both Hispanics and blacks, with a modest increase of FSGS in whites. The increase in FSGS in the three most common races in our community suggests that factors other than genetic, perhaps environmental, have a role in the pathogenesis of FSGS.
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              Prevalence of Nondiabetic Renal Disease in Diabetic Patients

              Tam Pham, John J Sim, Dean Kujubu … (2007)
              Background: Diabetic nephropathy is the leading cause of end-stage renal disease in the USA, yet most patients with type 2 diabetes mellitus are not formally evaluated with a renal biopsy. Our aim was to evaluate the prevalence of nondiabetic renal disease (NDRD) in patients with type 2 diabetes mellitus to determine common clinical indicators suggestive of NDRD. Methods: A retrospective analysis was performed on biopsy reports of patients who had undergone native renal biopsy between January 1, 1995, and December 31, 2005. Results: After exclusion of 57 patients, 233 patients with DM2 were included in our analysis. Mean age at the time of biopsy was 58.1 ± 13.7 years, and 53.0% of the study population were male. There were 124 cases (53.2%) with a pathologic diagnosis of NDRD, 64 (27.5%) with pure diabetic glomerulosclerosis (DGS) and 45 (19.3%) with concurrent NDRD and DGS (CD). Patients with NDRD tended to be younger than those with DGS and had significantly less associated diabetic retinopathy. Focal segmental glomerulosclerosis was the most common lesion found in patients with NDRD and accounted for 21.0% of all NDRD, followed by minimal-change disease (15.3%). IgA nephropathy (15.6%) and membranous glomerulonephritis (13.3%) were the most prevalent lesions found in patients with CD. Conclusions: The high prevalence of NDRD found in our population underscores the need for clinicians to consider renal biopsy in diabetic patients with an atypical clinical course, since additional disease-specific therapies may be helpful for this subset of the population.
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                Author and article information

                Journal
                Journal ID (nlm-ta): Korean J Intern Med
                Journal ID (iso-abbrev): Korean J. Intern. Med
                Journal ID (publisher-id): KJIM
                Title: The Korean Journal of Internal Medicine
                Publisher: The Korean Association of Internal Medicine
                ISSN (Print): 1226-3303
                ISSN (Electronic): 2005-6648
                Publication date (Print): September 2013
                Publication date (Electronic): 14 August 2013
                Volume: 28
                Issue: 5
                Pages: 565-572
                Affiliations
                Division of Nephrology, Department of Internal Medicine, Kyung Hee University School of Medicine, Seoul, Korea.
                Author notes
                Correspondence to Kyung Hwan Jeong, M.D. Division of Nephrology, Department of Internal Medicine, Kyung Hee University School of Medicine, 26 Kyungheedae-ro, Dongdaemun-gu, Seoul 130-701, Korea. Tel: +82-2-958-8200, Fax: +82-2-968-1848, khjeong@ 123456khu.ac.kr
                Article
                DOI: 10.3904/kjim.2013.28.5.565
                PMC ID: 3759762
                PubMed ID: 24009452
                SO-VID: f8299eb8-5e80-4292-8664-36bb7f77784c
                Copyright © Copyright © 2013 The Korean Association of Internal Medicine
                License:

                This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License ( http://creativecommons.org/licenses/by-nc/3.0/) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

                History
                Date received : 29 August 2012
                Date revision received : 24 September 2012
                Date accepted : 11 January 2013
                Categories
                Subject: Original Article

                ScienceOpen disciplines: Internal medicine
                Keywords: non-diabetic renal disease,diabetic nephropathies,diabetes mellitus, type 2
                Data availability:
                ScienceOpen disciplines: Internal medicine
                Keywords: non-diabetic renal disease, diabetic nephropathies, diabetes mellitus, type 2

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