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Resumen La enfermedad antimembrana basal glomerular (EMBG) es un trastorno autoinmune caracterizado por la presencia de anticuerpos antimembrana basal glomerular (AMBG), hemorragia pulmonar, glomerulonefritis necrotizante y deposito lineal de inmunoglobulinas en inmunofluorescencia directa. La predisposicion genetica, entre otros factores, posee un papel importante en el desarrollo de la enfermedad. Estudios previos han demostrado que el antigeno leucocitario humano (HLA), HLA-DR15 y HLA- DR4, se asocian con mayor riesgo de presentarla, mientras que el HLA-DR1 y HLA-DR7 han demostrado ser factor de proteccion frente a su desarrollo. Describimos el primer caso de dos hermanos no gemelos con EMBG con tipaje HLA identico, con factor de riesgo HLA-DR4 y factor de proteccion HLA-DR7. Planteamos la importancia de analizar el tipaje de histocompatibilidad en hermanos de pacientes con EMBG, para determinar el grado de susceptibilidad genetica y plantear en ellos un seguimiento estrecho, con el objetivo de lograr un diagnostico y tratamiento precoces en caso de presentar la enfermedad.

Resumen: Introducción: Estudios previos han demostrado una elevada mortalidad de los pacientes en tratamiento con hemodiálisis, aunque en pocos de ellos se analiza la supervivencia de los que reciben exclusivamente este tratamiento. Nuestro objetivo fue analizar la mortalidad de los pacientes que recibieron tratamiento con hemodiálisis. Métodos: Se analizó la cohorte de pacientes que iniciaron tratamiento sustitutivo entre los años 2010 y 2012 en la comunidad de Castilla-La Mancha y permanecieron en tratamiento con hemodiálisis. Se estudiaron las variables edad, sexo, enfermedad renal primaria, acceso vascular, hemoglobina, índice de Charlson y albúmina sérica al comienzo del tratamiento y se realizó un seguimiento hasta final de 2017. Resultados: La mortalidad fue del 63,4% a los 5 años y del 76% al final del periodo de seguimiento, sin diferencias entre varones y mujeres, y se relacionó con una mayor edad, el comienzo urgente o en aquellos con enfermedad renal reagudizada, la utilización de catéteres o una albúmina inferior a 3,5 g/dl. Conclusiones: La mortalidad en los pacientes que permanecen en diálisis es muy elevada y se asocia a factores no modificables como la edad pero también a otros que podemos prevenir o tratar, como el tipo de acceso vascular o el estado de nutrición al comienzo del tratamiento. Abstract: Introduction: Previous reports have shown very high mortality among hemodialyisis patients. Our goal was to analyze the mortality of patients in the Renal Registry of Patients who remained exclusively on hemodialysis treatment. Methods: The cohort of patients who started treatment in the community of Castilla-La Mancha between 2010 and 2012 and remained on hemodialysis treatment was analysed until the end of 2017. Age, sex, primary kidney disease, vascular access, hemoglobin, Charlson index and serum albumin were included. Results: Mortality rate was 63.4% after 5 years and 76% at the end of the study, with no difference between males and females, and was linked to an older age, urgent onset or in those with acute deterioration of chronic kidney disease, the use of catheters or albumin less than 3.5 g/dl. Conclusions: Mortality in patients who remain on hemodialysis is very high and is associated with non-modifiable factors such as age but also others that we can prevent or treat such as type of vascular access or nutrition status at the beginning of treatment.

Background and Aims Impairment in the diastolic function is strongly associated with heart failure and cardiovascular disease in patients with end-stage renal disease (ESRD), with a high prevalence of 50-65% and unobvious early symptoms. Hence, it is of great importance to explore serum biomarkers for early assessment of diastolic disfunction in patients with ESRD, providing evidence for performing an early intervention. When myocardial cell membrane integrity becomes damaged, cardiac troponin is released into the circulation, inducing an elevation of serum cardiac troponin in asymptomatic patients on dialysis. We analyzed the relationship between high-sensitivity cardiac troponin I biomarker (hs-cTnI) and left ventricular diastolic dysfunction (LVDD) in a cohort of asymptomatic patients on haemodialysis at our center. Method Cross-sectional study. We include patients on haemodialysis in our center. Demographic variables (age, sex), associated comorbidity, hs-cTnI levels, and echocardiographic parameters were collected. Statistical analysis was performed with SPSS 25.0. Categorical variables are expressed as percentages and compared using Chi2 test. Quantitative variables are expressed as mean ± standard deviation, and T-student, Anova or U-mann Whitney was used to compare them. Logistic regression analysis was performed to determine independent predictors of LVDD. Statistical significance for a value of p Results 80 patients, with an average age of 67.44 ± 13 years. 57.5% were men. 86.3% had high blood pressure (HBP), 52.5% were diabetic, 75% dyslipidemic, and 51.2% had overweight/obese body mass index. 32.5% had previous history of ischemic heart disease, 41.3% had moderate/severe left ventricle hypertrophy (LVH), 8.8% left ventricular ejection fraction (LVEF) 20 (OR 4.11 95% CI 1.38-12.18 p = 0.011) are independent risk factors for LVDD. Conclusion hs-cTnI levels could be a biomarker of LVDD in asymptomatic patients on haemodialysis. New studies with a greater number of patients would increase the evidence for this claim, in order to carry out early intervention and treatment.

Background and Aims Clinical practice guidelines recommend an arteriovenous fistula (AVF) as the preferred vascular access for hemodialysis. Patency of the arteriovenous access is important for effective hemodialysis. However, maintaining the patency of the AVF remains a challenge. We determined those independent prognostic factors for the patency of the AVF at the time of its creation. Method Cross-sectional study; We include all AVFs performed at the HGUCR in the last 2 decades. Demographic variables (age, sex), etiology of CKD and associated comorbidity were collected. We determine the factors involved in the primary patency of AVFs. Statistical analysis with SPSS 25.0. Categorical variables are expressed as percentages and are compared using the Chi2 test. Quantitative variables are expressed as mean ± standard deviation and the Mann Whitney Student-T/U was used to compare them. Statistical significance for a value of p Results 622 AVFs performed in 482 patients were reviewed. 86.8% were autologous. The mean age was 65.4±14 years; 66.6% were male. The most frequent etiologies of CKD were diabetic nephropathy (30.2%), unknown (18%), and glomerulonephritis (16.6%). 91.2% had arterial hypertension (HBP) and diabetes mellitus (DM) 47.9%. 48.7% received antiplatelet therapy and 15.6% anticoagulation prior to the creation of the AVF. 27% presented primary failure. The univariate analysis showed statistical significance for the qualitative variables HTA (p=0.002), treatment with statins (p Conclusion In our study, HTA and antiplatelet therapy prior to the creation of the VA behave as protective factors for primary failure, with high phosphorus levels being an independent factor for primary failure of AVFs.

Background and Aims The renal biopsy (RB) has been performed in the General Hospital of Ciudad Real (HGUCR) since the year 1989. It allows kidney diseases to be diagnosed and treated and pronostics to be made. We will analyse the results of these 30 years as well as the evolution of the various parameters studied. Method Descriptive study of the RB carried out in the HGUCR between 1989 and 2019. Age, sex, clinical syndrome (CS) at the time of the RB, number of glomeruli and histological diagnosis will be analysed. The patients are divided into 3 groups according to age: children (65). We will establish three periods of 10 years: period A (1989-1998), period B (1999-2008) and period C (2009-2019). The categorical variables are expressed as percentages and the quantitative variables average ± standard deviation. Statistical analysis with SPSS 25.0. Results 898 RB have been performed, average number of glomeruli 16, 70% of the RB with more than 10 glomeruli. The average age of the patients was 53±19 years old, 58% male. The most frequent CS was acute kidney failure (AKF) (35%), followed by nephrotic syndrome (NS) (30.5%), asymptomatic urinary disorders (19%), chronic kidney disease (11%), nephritic syndrome (3.6%), haematuria (0.7%) and arterial hypertension (0.7%). The most common in children were asymptomatic urinary disorders (50%), in adults NS (34%) and in the elderly AKF (55.5%). The predominant primary glomerulonephritis (GN): IgA nephropathy (IgAN) (15%), followed by membranous nephropathy (MN) (12%) and focal segmental glomerulosclerosis (FSGS) (11%). The most frequent secondary GN: vasculitis (11%) and lupus nephropathy (10%). 164 RB were performed in period A, 370 in period B and 346 in period C. In all three periods the predominant sex was male and the average age increased: 48 years old in A, 51 years old in B and 56 years old in C. Together with the increase in age, the indication of RB changes: NS in the first two periods and AKF in period C. The most frequent pathology in period A: FSGS (17%), IgAN (16%) in period B and IgAN (15%) followed by vasculitis (11%) in period C. Conclusion In the HGUCR the most common biopsied kidney pathology is IgAN, followed by MN. There has been an increase in the age of the patients as well as an increase in AKF and vasculitis. The KB constitutes a highly useful diagnostic test that allows us to establish prognostics and appropriate treatments.

Background and Aims Consensus document of the Spanish Society of Nephrology and many Primary Care (PC) related societies for chronic kidney disease (CKD) detection and management provides to the PC doctor referral criteria (RC) to nephrology clinic. The aim of the study is to describe the referrals to our center nephrology clinic and evaluate the influencing factors for RC adequacy. Method Retrospective observational study. We included the referred patients to our nephrology clinic from October 2019 to May 2020. We recollected demographic variables, as well as comorbidity, renal function, RC adequacy and follow-up. Categorical variables are expressed as percentages and compared using Chi2 test. Quantitative variables are expressed as mean ± standard deviation and compared using t-student test. Cox regression was performed to determine independent predictors for RC adequacy. Statistical significance for a value of p< 0,05 or CI 95%. Statistical analysis was performed with SPSS 25.0. Results 238 patients, 55.5% male. Average age 63 ± 17 years, being 34% older than 75 years. 67.6% had at least 3 cardiovascular risk factors. 85.3% were referred from PC with 57.1% of them from a rural center. There was adequation to the RC on 55%. The most frequent RC was CKD progression (37.4%). Mean serum creatinine at the time of referring was 1.91 ± 0.59 mg/dl with a glomerular filtration rate 34 ± 11 ml/min/1.73m2 and 329.43 ± 992.01 mg/g or mg/24h of albuminuria. From the 45% of those who did not had RC adequacy 51.4% had CKD III stage and 21.5% had false refractory hypertension (controlled or under-treated). Mean time of follow-up was 5 ± 1.7 months. RC adequacy was related with being referred from PC (59.6% vs 28.6% p=0.001), smoking (65.9% vs 49% p=0.012), time of referring creatinine (1.54 ± 0.86 vs 1.18 ± 0.39 p=0.001) and albuminuria (43406 ± 1009.7 vs 136.13 ± 637.16 p=0.019) and end of follow-up albuminuria (265.84 ± 516.82 vs 81.67 ± 250.7 p=0.007). RC adequacy was associated with receiving follow-up on nephrology clinic (80.2% vs 19.8% p=0.001). Logistic regression showed that being referred from PC (OR 3.64 IC 95% 1.03-12.8 p=0.044) and a worse renal function at the referring (OR 2.49 IC 95% 1.19-5.24 p=0.015) were associated with RC adequacy. Conclusion The experience in our center shows that there is not an adequacy on the current RC from the Spanish Society of Nephrology in almost half of the patients. That proportion decreases when patients are referred from PC close to 40%. CKD progression is the main reason for referral with most of patients being elderly and with a high cardiovascular risk. The need for greater dissemination of RC can be inferred from the significant number of inappropriate referrals, encouraging us to propose their review.

Background and Aims Dialysis patients constitute a risk group for coronavirus infection due to their immunosuppressed condition, with the increased risk of morbidity and mortality that this entails. We analyzed the factors associated with mortality from coronavirus infection in a cohort of patients undergoing renal replacement therapy at our center. Method Transversal study. We included patients in renal replacement therapy (RRT) in our center. Demographic variables (age, sex), associated comorbidity, RRT technique, clinical and laboratory parameters were collected. Statistical analysis with SPSS 25.0. Categorical variables are expressed in percentages and are compared using the Chi2 test. The quantitative variables are expressed as mean ± standard deviation and compared using Student's T-test. Statistical significance p Results 38 patients, mean age 66 ± 18 years, 51.4% men. 92.1% had arterial hypertension, 39.5% diabetes mellitus (DM). 63.2% on hemodialysis, 2.6% peritoneal dialysis, 34.2% transplanted. 84.2% presented fever, 63.2% cough, 73.7% pneumonia, 34.2% dyspnea, 15.8% digestive symptoms. 21.1% leukopenia, 73.7% lymphopenia, money D 1509 ± 1351, CRP 12.45 ± 19.47, sodium 136 ± 5.5. 81.% were admitted to hospitalization, of which 2.6% required admission to the ICU. 44% died. Mortality was statistically significantly related to DM (56.3% vs 43.8% p = 0.05), and with the need for hospitalization (93.8 vs 6.3% p = 0.054). Conclusion In our experience, DM patients and those who required hospitalization had a higher risk of mortality.

Background and Aims The population with chronic kidney disease (CKD) presents an increased risk of infection by hepatitis B virus (HBV). Usually, the protective immunological response rate (considering HBV titer > 10 mIU/mL) is 90–95% after the 4th dose of vaccine; In CKD the immune response is lower and correlates with the degree of CKD. In dialysis, this response is variable, less than 50% with three-dose regimens and higher with four doses. Cardiovascular risk factors have been implicated in the response rate to vaccination. The objective of this work is to analyze the efficacy of the HBV vaccine in hemodialysis patients and to identify cardiovascular factors as predictors of response. Method Retrospective observational study. We evaluated the response to a 4-dose vaccination protocol (0-1-2-6 months), determining the levels of HBVA 3 months after the last dose. Demographic variables (age, sex), associated comorbidity, etiology of CKD, among others, were collected. Statistical analysis with SPSS 25.0. Categorical variables are expressed as percentages and have been compared using the Chi2 test. The quantitative variables are expressed as mean +/- standard deviation and the T-student was used to compare them. Statistical significance for a value of p Results 89 patients were included; 68.5% are male, with an average age of 65 years. 85.4% had arterial hypertension, and 39.3 were diabetic, the most frequent cause of CKD being renal vascular disease (20.8%), diabetic nephropathy (26.4%) and interstitial (9%). The immune response to HBV vaccination was 79.2%. When making statistical comparisons between the qualitative variables, we have not observed differences between serological response and DM or sex; We did find a trend towards significance when comparing the serological response with the variable HT and etiology of CKD (polycystic kidney disease), pNS. The comparison of means between quantitative variables when performing the Student's T-test did not show differences for any of the study variables. Conclusion In our center, HBV vaccination on dialysis achieves a response rate of 79.2%. HT may condition the immune response to vaccination in HD patients, although significance was not reached. Hereditary pathology has been the one that has shown the best serological response with respect to the rest of etiologies, perhaps associated with greater residual renal function.

Background and Aims Management of ANCA-Associated Vasculitis (AAV) is in constant update. The aim of the study is to describe our experience as a territorial reference center with this systemic disease and to analyze which factors have a significant influence on the development of end-stage renal disease (ESRD). Method Retrospective observational study. All the patients who developed AAV in our center between 2010 and 2019 were included. Demographic variables (age, sex), renal function, other vasculitis related symptoms, induction and maintenance therapy, response degree and follow-up were collected. Categorical variables are expressed as percentages and compared using Chi2 test. Quantitative variables are expressed as mean ± standard deviation and compared using Mann-Whitney U test. Cox regression was performed to determine independent predictors of ESRD. Kaplan-Meier was used to estimate ESRD-free survival. Statistical significance for a value of p< 0,05. Statistical analysis was performed with SPSS 25.0. Results 45 patients were analyzed, with an average age of 70 ± 11 years. 62.2% were men. Mean time of follow-up 36 ± 31.6 months. 37.8% presented c-ANCA autoantibodies and 57.8% p-ANCA. Mean baseline serum creatinine level was 5.51 ± 3.65 mg/dl and proteinuria 2.82 ± 2.48 g/24h. 77.8% received cyclophosphamide as induction immunosuppressive treatment whereas 13.3% rituximab. 50% received azathioprine, 36.1% mycophenolate and 13.9% rituximab as maintenance treatment. 37.8% patients underwent plasma exchange therapy and 44.4% hemodialysis. Complete remission was achieved by 13.3% of patients, while 57.8% partial remission. 28.9% had absence of remission. 28.9% achieved ESRD. ESRD was associated with undergoing hemodialysis (69.2% vs 30.8% p=0.033), to the type of response (complete 7.7% vs partial 23.1% vs no response 69.2%), baseline creatinine level (8.36 ± 5.44 vs 4.35 ± 1.64 mg/dl p=0.011), creatinine 6 months after induction treatment (4.3 ± 2.05 vs 2.04 ± 0.77 mg/dl p=0.001) and at the end of follow-up (6.33 ± 2.47 mg/dl vs 2.2 ± 1.29 mg/dl p=0.001) and also to baseline proteinuria (4.21 ± 3.12 vs 2.25 ± 1.96 p=0.003), proteinuria 6 months after induction treatment (1.4 ± 1.46 vs 0.58 ± 0.73 g/24h p=0.014) and at the end of follow-up (2.48 ± 1.9 vs 1.12 ± 1.64 p=0.001). Logistic regression only showed end of follow up serum creatinine level as an independent risk factor of ESRD (OR3.74 IC 95% 1.01-13.75 p=0.047). ESRD-free survival chance after 5 of follow-up was 67%. Conclusion Only serum creatinine level at the end of follow-up could be found as an associated factor with ESRD. Greater number of patients would be needed in order to obtain other factors leading to ESRD in patients with AAV.

Background and Aims Clinical practice guidelines recommend an arteriovenous fistula (AVF) as the preferred vascular access for hemodialysis and are associated with a lower incidence of morbidity and mortality. However, primary vascular access (AV) failure is not uncommon. Low-grade inflammation is present in ERCT. We identify the inflammatory parameters that influence the primary permeability of vascular access for hemodialysis. Method Cross-sectional study; We include all the AVs performed in the HGUCR. We evaluate the initial operation after the creation of the AV. Demographic variables (age, sex), aetiology of CKD and associated comorbidity were collected. Statistical analysis with SPSS 25.0. Categorical variables are expressed as percentages and are compared using the Chi2 Test. Quantitative variables are expressed as mean ± standard deviation and the t-student was used to compare them. We performed a multivariate analysis to determine those factors involved in the primary failure of the VA. Statistical significance for a value of p Results 600 VA performed on 466 patients were reviewed between October 2009 and December 2019. 492 autologous VA (86.8%) and 75 prosthetic VA (13.2%) were performed. The mean age of the patients was 65.3 ± 14.2 years and 66.2% were male. The most frequent etiology of CKD was diabetic nephropathy (29.9%), followed by non-affiliated (18%) and glomerulonephritis (16.5%). 90.8% of the patients had arterial hypertension (HT), diabetes mellitus (DM) 48%. 77.2% of AV presented primary permeability. In the univariate analysis using Chi2 and T student, statistical age (p = 0.017), HT (p = 0.002), statin treatment (p = 0.002), antiplatelet therapy (p = 0.001), low ferritin levels (p = 0.011) and PCR (p = 0.019). When performing a multivariate analysis, the high CRP figures (OR: 0.64 95% CI 0.42-0.98 p = 0.043) and ferritinemia (OR: 1.04 95% CI 1.01-1.06 p = 0.013) are predictive factors of primary AV failure. Conclusion In our study, high CRP decreases the probability of primary functioning of AVFs by 36% and elevated ferritin levels are predictors of primary failure after adjusting for age and sex in the multivariate model.

Background and Aims Elderly patients and comorbidity present more frequently deterioration of their cognitive and / or functional capacity, and consequently worse quality of life related to health and the need for help to perform their basic activities. It has been described in the literature that peritoneal dialysis (PD) is a protective factor in the patient's survival against hemodialysis (HD). Quality of life is an important parameter in patients undergoing renal replacement therapy, which influences the choice of dialysis modality. We analyzed and compared the degree of functional dependence of patients on PD versus HD. Method Descriptive and cross-sectional study. A total of 84 patients belonging to the General University Hospital of Ciudad Real were included. Demographic variables (age, sex), associated comorbidity, etiology of CKD, among others, were collected. To assess the degree of dependence, the Barthel index and Lawton and Brody were performed. Statistical analysis with SPSS 25.0. Categorical variables are expressed as percentages and have been compared using the Chi2 test. Quantitative variables are expressed as mean +/- standard deviation, and the T-student was used to compare them. Statistical significance for a value of p Results Of the 84 patients, 40.5% received PD and 59.5% HD. 60.7% were male and 39.3% female, with an average age of 60.90 years. 75% were hypertensive, 38.1% diabetic, 61.9% dyslipidemic, 27.4% obese and 61.9% had peripheral vasculopathy. The most frequent causes of CKD were diabetic nephropathy (22.6%), glomerular etiology (21.4%), unfiltered (20.2%) and nephroangiosclerosis (14.3%), among others. The degree of functional dependence according to the Barthel index was 63.1.9% for total independence, 29.8% mild dependence, 4.8% moderate dependence and 1.2% total dependence; and for the Lawton and Brody index, 42.9% total independence, 14.3% mild dependence, 27.4% moderate dependence, 11.9% severe dependence and 3.6% total dependence. When comparing the degree of functional dependence between both dialysis techniques, we observed that patients in PD had a lower degree of functional dependence compared to patients in HD, these differences being statistically significant (Lawton and Brody 73.5% in PD vs. 22% in HD, p Conclusion In our experience, the degree of functional dependence in patients in PD is lower compared to patients in HD with less comorbidity, being able to condition the choice of the technique of renal replacement therapy.

ResumenAntecedentesLos registros de biopsias renales permiten la recogida de datos histopatológicos que, puestos en su conjunto, ayudan a comprender enfermedades y su historia natural.ObjetivosAnalizar los datos del Registro de Glomerulonefritis de Castilla-La Mancha (GLOMANCHA) y la evolución de las diferentes enfermedades biopsiadas (1994-2008).MétodosSe recogieron las 6 enfermedades biopsiadas más prevalentes durante los 14 años (941 biopsias) en 5 hospitales de la comunidad autónoma. En 2008 se evaluó la situación vital y renal de los pacientes y se analizaron los factores asociados a dicha situación en cada enfermedad.ResultadosDe las 941 biopsias, el 59% fueron de varones con una edad media de 48±18 años. En el momento de la biopsia la mediana de filtrado glomerular (FG) era de 50,3 (25,5-76,3) ml/min/1,73 m2 y la de proteinuria de 3,4 (1,5-6,4) g al día. La enfermedad más frecuente fue la nefropatía lúpica, seguida de la glomeruloesclerosis focal y segmentaria, y de la membranosa. El mejor pronóstico renal durante el seguimiento (media 7,3±4,8 años) fue el de la nefropatía lúpica y la nefropatía por cambios mínimos; la glomeruloesclerosis focal y segmentaria y las glomerulonefritis rápidamente progresivas de tipo 3 tuvieron el peor pronóstico renal. Esta última, además, tuvo el peor pronóstico vital.ConclusionesGLOMANCHA demuestra el mal pronóstico de las glomerulonefritis rápidamente progresivas de tipo 3, a diferencia de la nefropatía por cambios mínimos y lúpica. La función renal es un predictor independiente de supervivencia renal y de mortalidad en nuestra población.AbstractBackgroundRenal biopsy registries allow histopathological data to be collected to improve knowledge of different pathologies and their natural history.AimTo analyse the data of the Castilla La Mancha Glomerulonephritis Registry (GLOMANCHA) and the evolution of the different biopsy-proven pathologies between 1994 and 2008.MethodsThe 6 most common biopsy-proven pathologies were collected during the 14 years of the study (941 biopsies) in the 5 participant centres of the autonomous community. In 2008, we assessed patient renal survival and mortality and we evaluated associated factors to each situation for each pathology.ResultsOf the 941 biopsies, 59% belonged to men, with a mean age of 48±18 years. At the time of the biopsy, the median glomerular filtration rate was 50.3 (25.5-76.3) ml/min/1,73 m2 and median proteinuria was 3.4 (1.5-6.4) grams per day. The most common pathology were lupus nephropathy, followed by focal segmental glomerulosclerosis and membranous nephropathy. Lupus nephropathy and minimal change disease achieved the best renal prognosis during follow-up (mean 7.3±4.8 years). Rapidly progressive glomerulonephritis type 3 and focal segmental glomerulosclerosis had the worst renal prognosis. In addition, rapidly progressive glomerulonephritis type 3 presented the worst vital prognosis.ConclusionsIn GLOMANCHA, we demonstrate the poor prognosis of rapidly progressive glomerulonephritis type 3, in contrast to minimal change disease or lupus nephropathy. Renal function is an independent predictor of renal survival and mortality in this study.

Resumen Antecedentes: Los registros de biopsias renales permiten la recogida de datos histopatológicos que, puestos en su conjunto, ayudan a comprender enfermedades y su historia natural. Objetivos: Analizar los datos del Registro de Glomerulonefritis de Castilla-La Mancha (GLOMANCHA) y la evolución de las diferentes enfermedades biopsiadas (1994-2008). Métodos: Se recogieron las 6 enfermedades biopsiadas más prevalentes durante los 14 años (941 biopsias) en 5 hospitales de la comunidad autónoma. En 2008 se evaluó la situación vital y renal de los pacientes y se analizaron los factores asociados a dicha situación en cada enfermedad. Resultados: De las 941 biopsias, el 59% fueron de varones con una edad media de 48 ± 18 años. En el momento de la biopsia la mediana de filtrado glomerular (FG) era de 50,3 (25,5-76,3) ml/min/1,73 m2 y la de proteinuria de 3,4 (1,5-6,4) g al día. La enfermedad más frecuente fue la nefropatía lúpica, seguida de la glomeruloesclerosis focal y segmentaria, y de la membranosa. El mejor pronóstico renal durante el seguimiento (media 7,3 ± 4,8 años) fue el de la nefropatía lúpica y la nefropatía por cambios mínimos; la glomeruloesclerosis focal y segmentaria y las glomerulonefritis rápidamente progresivas de tipo 3 tuvieron el peor pronóstico renal. Esta última, además, tuvo el peor pronóstico vital. Conclusiones: GLOMANCHA demuestra el mal pronóstico de las glomerulonefritis rápidamente progresivas de tipo 3, a diferencia de la nefropatía por cambios mínimos y lúpica. La función renal es un predictor independiente de supervivencia renal y de mortalidad en nuestra población. Abstract Background: Renal biopsy registries allow histopathological data to be collected to improve knowledge of different pathologies and their natural history. Aim: To analyse the data of the Castilla La Mancha Glomerulonephritis Registry (GLOMANCHA) and the evolution of the different biopsy-proven pathologies between 1994 and 2008. Methods: The 6 most common biopsy-proven pathologies were collected during the 14 years of the study (941 biopsies) in the 5 participant centres of the autonomous community. In 2008, we assessed patient renal survival and mortality and we evaluated associated factors to each situation for each pathology. Results: Of the 941 biopsies, 59% belonged to men, with a mean age of 48 ± 18 years. At the time of the biopsy, the median glomerular filtration rate was 50.3 (25.5-76.3) ml/min/1,73 m2 and median proteinuria was 3.4 (1.5-6.4) grams per day. The most common pathology were lupus nephropathy, followed by focal segmental glomerulosclerosis and membranous nephropathy. Lupus nephropathy and minimal change disease achieved the best renal prognosis during follow-up (mean 7.3 ± 4.8 years). Rapidly progressive glomerulonephritis type 3 and focal segmental glomerulosclerosis had the worst renal prognosis. In addition, rapidly progressive glomerulonephritis type 3 presented the worst vital prognosis. Conclusions: In GLOMANCHA, we demonstrate the poor prognosis of rapidly progressive glomerulonephritis type 3, in contrast to minimal change disease or lupus nephropathy. Renal function is an independent predictor of renal survival and mortality in this study.

Purpose The biocompatibility of dialyzers may influence the inflammatory state of hemodialysis patients. This study compares the effect of a high-flux polynephron membrane with other high-flux membranes, helixone and polyamide, on some inflammation biomarkers based on the analysis of circulating mononuclear cells (MC). Methods The study included 47 patients on hemodialysis with helixone and polyamide; 9 formed the control group, without changes in their dialyzers throughout the study, and 38 formed the intervention group, in which their dialyzers were replaced by polynephron. In both groups, blood samples were taken at the beginning of the study before and after hemodialysis session, and at the end of the study 4 months later. In each extraction, biochemical parameters were determined, and MC isolated using Ficoll gradient. Production of reactive oxygen species and the percentage of activated MC (CD14+CD16+) were measured by flow cytometry, and protein levels of heat-shock proteins (Hsp70/Hsp90) studied by Western blot. Results After 1 hemodialysis session with different membranes, no significant differences were observed in the different parameters considered. After 4 months of dialysis with polynephron, a significant reduction in the percentage of CD14+CD16+ and in the β2-microglobulin reduction ratio were found, with respect to helixone and polyamide, without changes in the other parameters analyzed. Conclusions The use of polynephron for 4 months reduces the percentage of CD14+CD16+ compared to helixone and polyamide, suggesting a better profile regarding activation of the inflammatory response. These findings could be explained by a better biocompatibility or an increased reduction of medium-sized toxic molecules.

BACKGROUND: Prediction of mortality in wait-listed patients for kidney transplantation (KT) has not been well elucidated. We assessed whether application of the Charlson comorbidity index (CCI) and other uremia-related comorbidities, not included in the CCI, were associated with mortality in these patients. METHODS: We included 3851 adult patients from the Andalusian Registry who were placed on the waiting list for KT during the study period (1984-2012). A total of 1975 patients received a successful KT and were censored at that point, whereas 1876 were on the waiting list at any time. Multivariate Cox proportional regression analysis and competing risk models, both of which included a propensity score for factors leading to KT, were constructed to examine death in wait-listed patients. RESULTS: Overall mortality on the waiting list was 24%, and cardiovascular disease was the leading cause of death (25%), followed by infections (19%) and malignant disorders (7%). By competing risk models, age older than 50 years (subhazard ratio [SHR] 1.4; 95% CI, 1.1-1.9), CCI score higher than 3 (SHR 2.8; 95% CI, 2.1-3.7), a central venous catheter (SHR 1.8; 95% CI, 1.4-2.2) and unemployed status (SHR 1.7; 95% CI, 1.3-2.2) at dialysis entry were significantly associated with mortality. When these factors were incorporated in a composite risk model, mortality risk increased significantly with increasing risk levels. CONCLUSION: A limited number of comorbidities, easily measurable at entry to dialysis, are associated with mortality in wait-listed patients. This simple clinical assessment may help prioritize high-risk wait-listed patients for receiving an age-matched deceased donor kidney.

Background: Lupus nephritis (LN) is a severe complication of systemic lupus erythematosus. Data from national registries based on renal biopsies are scarce. The aim of our study was to analyze the demographic characteristics, clinicopathological correlations, and risk factors associated with renal failure in patients with LN at the time of renal biopsy. Methods: We performed a cross-sectional observational study based on data from the Spanish Registry of Glomerulonephritis for the years 1994–2009. The outcome measure was the presence of renal failure (eGFR 2). We also recorded age, gender, proteinuria levels, hypertension, and histological class. Results: We collected 17,525 native renal biopsies, of which 1,648 biopsies showed LN lesions. In total, 609 patients (37%) showed renal failure at the time of renal biopsy. The univariate analysis showed that these patients were older, had higher levels of proteinuria, and a higher prevalence of hypertension than the group with eGFR ≥60 ml/min/ 1.73 m2. The histological class of LN was recorded for 566 patients, and multivariate logistic regression analysis showed that the independent risk factors for renal failure at the time of renal biopsy were age (OR 1.03; 95% CI 1.01–1.04), male gender (OR 1.94; 95% CI 1.12–3.10), hypertension (OR 3.18; 95% CI 2.16–4.67), proteinuria (OR 1.15; 95% CI 1.08–1.24), and histological classes III and IV (OR 1.82; 95% CI 1.16–2.87). Conclusions: Data from the Spanish Registry of Glomerulonephritis provide valuable information about risk factors for renal failure in patients with LN at the time of renal biopsy.

Renal biopsy registries allow histopathological data to be collected to improve knowledge of different pathologies and their natural history.To analyse the data of the Castilla La Mancha Glomerulonephritis Registry (GLOMANCHA) and the evolution of the different biopsy-proven pathologies between 1994 and 2008.The 6 most common biopsy-proven pathologies were collected during the 14 years of the study (941 biopsies) in the 5 participant centres of the autonomous community. In 2008, we assessed patient renal survival and mortality and we evaluated associated factors to each situation for each pathology.Of the 941 biopsies, 59% belonged to men, with a mean age of 48±18 years. At the time of the biopsy, the median glomerular filtration rate was 50.3 (25.5-76.3) ml/min/1,73 m(2) and median proteinuria was 3.4 (1.5-6.4) grams per day. The most common pathology were lupus nephropathy, followed by focal segmental glomerulosclerosis and membranous nephropathy. Lupus nephropathy and minimal change disease achieved the best renal prognosis during follow-up (mean 7.3±4.8 years). Rapidly progressive glomerulonephritis type 3 and focal segmental glomerulosclerosis had the worst renal prognosis. In addition, rapidly progressive glomerulonephritis type 3 presented the worst vital prognosis.In GLOMANCHA, we demonstrate the poor prognosis of rapidly progressive glomerulonephritis type 3, in contrast to minimal change disease or lupus nephropathy. Renal function is an independent predictor of renal survival and mortality in this study.

Spondylodiscitis is an infection of the vertebral body and adjacent intervertebral discs, whose most common means of spreading is the haematogenous route. It is a rare disease but its overall incidence is increasing, mainly due to increased bacteraemia in patients with intravascular devices, such as that used in patients on renal replacement therapy with haemodialysis. Its diagnosis is difficult due to non-specific symptoms and as such, for early and accurate diagnosis, MRI is necessary. The early empirical antibiotic treatment and the multidisciplinary approach may improve the prognosis of this potentially serious infection. We report a series of cases diagnosed with spondylodiscitis in our Nephrology Unit.