The investigation of hawthorn (Crataegus orientalis) plant's inhibition effect on angiotensin converting enzyme and in silico studies.

Hawthorn plant is used among people due to its cardiovascular, anti-inflammatory, and antihistamine properties. But no scientific study has been done about Crataegus orientalis (Mill.) M.Bieb. The presented study was planned to determine the effects of ethanol and n-hexane extracts of Crataegus orientalis leaves on human plasma ACE enzyme. In the study, the effect of plant extracts on ACE was studied by the spectrophotometric method. The chemical composition of the plant extracts was determined by HPLC-DAD analyses. In addition, molecular doking and ADME prediction studies were carried out. As a result, the obtained data showed that Crataegus orientalis could have an important place in the pharmaceutical industry and drug discovery studies, as it supports the traditional use of Crataegus orientalis as hypotensive. The results of the molecular docking studies revealed that the interactions of the selected compounds with the human ACE enzyme caused inhibition.

Modified histopathological classification with age-related glomerulosclerosis for predicting kidney survival in ANCA-associated glomerulonephritis.

BACKGROUND: The histopathological classification of ANCA-GN divides patients into four groups based on signs of glomerular injury. However, this classification did not consider age-related glomerulosclerosis. In this study, we aimed to compare the prediction of renal survival between Berden's ANCA-GN histopathological classification and ANCA-GN histopathological classification modified with age-related glomerulosclerosis. METHODS: Between January 2004 and December 2019, 65 patients diagnosed with ANCA-GN were enrolled. Demographic, laboratory, and histopathologic findings were retrospectively analyzed. Renal survival analyses were compared according to classical and modified ANCA-GN histopathological classifications. Multivariate Cox regression analysis for the factors affecting renal survival was performed. RESULTS: In Berden's ANCA-GN histopathological classification, 15 patients were in the focal group, 21 in the crescentic, 21 in the sclerotic, and 8 in the mixed group. The ANCA-GN histopathological classification model generated statistically significant predictions for renal survival (p = 0.022). When the histopathological classification was modified with age-related glomerulosclerosis, eight of the nine patients previously classified in the sclerotic group were classified in the mixed and one in the crescentic groups. Modification of histopathological classification with age-related glomerulosclerosis increases the statistical significance in renal survival analysis (p = 0.009). The multivariate Cox regression analysis showed that the disease-related global sclerotic glomeruli percentage and serum creatinine level were significant independent factors. CONCLUSION: Modification of Berden's ANCA-GN histopathological classification model with age-related glomerulosclerosis may increase the statistical significance of the histopathological classification model.

Hepatotoxicity associated with eculizumab in a patient with atypical hemolytic uremic syndrome / Hepatotoxicidad asociada con eculizumab en un paciente con síndrome urémico hemolítico atípico

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Prevalence of Fabry disease among Turkish dialysis patients: Data from hemodialysis centers in Bursa province.

BACKGROUND: Detection of potential Fabry disease patients before appearance of life-threatening findings is of great importance, particularly in high-risk populations. This study was designed to determine prevalence of Fabry disease among Turkish patients undergoing peritoneal dialysis and hemodialysis for chronic renal failure (CRF). METHODS: A total of 1,527 patients (mean (SD) age: 60.2 (14.2) years, 55.5% were males) on hemodialysis (n = 1,435) or peritoneal dialysis (n = 92) for CRF were included in this multicenter study conducted at 17 dialysis centers across Bursa province, Turkey. Prevalence of the disease was determined using combined enzymatic and genetic strategy with measuring the activity of α-galactosidase A (α-Gal A) and Sanger sequence analysis based genotyping in α-galactosidase A gene (GLA) in dried blood samples (DBS). RESULTS: Overall α-Gal A activity was determined to be below the reference value in 130 (8.5%) of 1,527 patients. GLA genotyping confirmed the diagnosis of Fabry disease in 5 (0.3%) patients with low α-Gal A activity. All Fabry-positive patients were males corresponding to a 0.6% prevalence of disease in this gender. CONCLUSION: In conclusion, our findings, which were based on the use of DBS for both enzymatic activity and genotyping analyses, revealed the diagnosis of Fabry disease in 5 males corresponding to overall 0.3% prevalence of disease in the cohort and 0.6% prevalence among males. Our results support the likelihood of unrecognized Fabry disease in a nonnegligible number of patients on dialysis and thus emphasize the value of screening studies in terms of detection of new cases and improved prognosis of the disease via early diagnosis and treatment.

The impact of diabetes mellitus on peritoneal dialysis: the Turkey Multicenter Clinic Study.

PURPOSE: It is well established that diabetic peritoneal dialysis (PD) patients have a higher mortality rate than the other PD population. This study was designed to determine the overall predictors of survival and compared mortality and morbidity between diabetic and non-diabetic Turkish PD patients. METHODS: We conducted a multicenter retrospective study with 915 PD patients [217 had diabetes mellitus (DM)]. Serum albumin, PTH, HbA1c, co-morbid diseases, dialysis adequacy (Kt/V), and peritoneal transport characteristics as well as peritonitis episodes and ultrafiltration failure during the follow-up period were recorded. RESULTS: DM patients were older and had more co-morbidities than non-DM patients. Peritonitis rates were higher in DM patients (one episode per 35.9 patient months) compared to non-DM patients (one episode per 41.5 patient months) (p < 0.001). On Kaplan-Meier analysis, patient survival was significantly lower in DM patients with the 2-, 3- and 5-year patient survival rates of 90.8%, 87.8% and 78.2% in non-diabetics and 80.9%, 70.4% and 61.2% in diabetics, respectively. On Cox regression analysis, DM (HR 1.5, p = 0.022), age (HR 1.03, p < 0.001), baseline serum albumin (HR 0.39, p < 0.001), heart failure (HR 0.038, p = 0.038), peripheral artery disease (HR 1.83, p = 0.025) and amputation (HR 4.1, p = 0.009) at baseline were significant predictors of overall mortality. CONCLUSIONS: Patient survival is lower in diabetic compared to non-diabetic patients on PD. Peritonitis rates were also higher in diabetic PD patients. DM, older age, albumin level and cardiovascular co-morbidities are predictors of mortality.

Ki-67 proliferation index in renal biopsy samples of patients with systemic lupus erythematosus and its correlation with clinical findings.

INTRODUCTION: Systemic lupus erythematosus is an autoimmune disease that may affect almost all organ systems. Renal involvement is the most significant prognostic factor. Renal biopsy findings play an important role in treatment decision. Ki-67 is a monoclonal antibody that is only found in proliferative cells. This study aimed to investigate the proliferative activity in renal biopsy specimens of patients with lupus nephritis using the Ki-67 monoclonal antibody, and to compare the proliferative index between different subgroups of patients. MATERIALS AND METHODS: Renal biopsy specimens of 29 patients with systemic lupus erythematosus were retrospectively evaluated. Type of lupus nephritis and activity and chronicity indexes were determined. Ki-67 immunostaining was performed. For each patient, 1000 cells were counted and the number of Ki-67 positive cells was determined. The Ki-67 activity index was compared between different subgroups of lupus nephritis and correlated with systemic lupus erythematosus disease activity index, serum creatinine, proteinuria, anticardiolipin antibodies, and complement levels. RESULTS: A positive correlation between Ki-67 proliferation index, serum creatinine levels, and systemic lupus erythematosus disease activity index were found. Although conventional activity indexes were low, in 3 of 9 patients with class II lupus nephritis, Ki-67 proliferation indexes were high, indicating proliferation. CONCLUSIONS: Ki-67 can be used as a proliferation marker in renal biopsy specimens for patients diagnosed with systemic lupus erythematosus.

Arm circumference: its importance for dialysis patients in the obesity era.

PURPOSE: The purposes of this study were to investigate the association between arm circumference and body mass index (BMI) and to discuss problems, mainly arm circumference and cuff size mismatch, that could affect the reliability of home blood pressure monitoring (HBPM) among peritoneal dialysis (PD) and hemodialysis (HD) patients. METHODS: 525 PD and 502 HD patients from 16 centers were included in the study. A two-part questionnaire was used to gather information from the participants. Arm circumferences were categorized into four groups according to the British Hypertension Society cuff size recommendations. RESULTS: Mean BMI and arm circumference of all participants were 25.0 kg/m(2) and 27.6 cm, respectively. There was a significant correlation between BMI and arm circumference. The mean BMI and arm circumference values were higher in PD patients than in HD patients. Requirement of a large-sized adult cuff was more common among PD patients compared to HD patients (14 % vs 8 %, p = 0.002). CONCLUSIONS: Since HBPM is a useful tool for clinicians to improve BP control, nephrologists should be aware of the problems related to HBPM in dialysis patients and take an active role to increase the reliability of HBPM.

The time course of gastric methotrexate intolerance in patients with rheumatoid arthritis and psoriatic arthritis.

OBJECTIVES: This study aimed to evaluate the incidence and the time course of methotrexate (MTX)-associated gastric intolerance in patients with rheumatoid arthritis and psoriatic arthritis. METHODS: Four hundred twenty subjects undergoing MTX treatment for rheumatoid arthritis (n = 346) and psoriatic arthritis (n = 74) were retrospectively assessed. The incidence and time course of gastric MTX intolerance resulting in treatment discontinuation were investigated. In addition, the relations between gastric intolerance and patient characteristics, including gender, age, diagnosis, and rheumatoid factor (RF) positivity, were examined. RESULTS: Overall, oral MTX discontinuation rate due to gastric intolerance was 28.6 %. The time to discontinuation for oral MTX was 8.1 ± 11.5 months on average, with more than half of the discontinuations occurring within the first three months of treatment. Discontinuation was not associated with gender, age, diagnosis, or RF positivity. More than half of the patients that switched to a parenteral treatment regimen (52.6 %, 20/38) could tolerate the agent. CONCLUSIONS: Gastric MTX intolerance usually develops within the first year of treatment and presents a major obstacle to long-term treatment retention in patients with rheumatologic disease. However, parenteral MTX appears to be a good alternative for patients intolerant of oral MTX.

Tumor necrosis factor-alpha antagonist therapy-induced psoriasis in Turkey: analysis of 514 patients.

OBJECTIVES: New adverse events are being reported with the increased use of anti-tumor necrosis factor (TNF) α therapy. We studied cases of anti-TNFα-induced psoriasis observed in our pool of 514 patients receiving anti-TNFα treatment in Turkey. METHODS: Three rheumatoid arthritis patients and 3 ankylosing spondylitis patients with anti-TNFα-induced psoriasis were included in the study. All patients were examined by a dermatologist, and 3 patients underwent skin biopsy. RESULTS: None of the 6 patients had preexisting psoriasis or a familial history of psoriasis. The earliest and latest occurrences of psoriatic lesions were at the 6th week and 44th month of anti-TNFα therapy, respectively. Psoriasis was severe and refractory in two patients (requiring systemic treatment), while it presented as mild in four patients. Anti-TNFα therapy was totally withdrawn in case 1. In case 2, the treatment was halted for 3 months then switched to another TNFα blocker, and case 3 was switched to another anti-TNFα treatment. The treatment was sustained in the other 3 patients (cases 4, 5, and 6). CONCLUSIONS: TNFα blockers are very effective agents in the treatment of psoriasis, but it is interesting that the same molecules can, paradoxically, induce psoriasis. The occurrence of anti-TNFα-induced psoriasis in six out of 514 patients suggests that the incidence of this adverse reaction is, in fact, as not low as presumed in the literature. In some cases, a severe course of psoriasis may limit the use of these agents.

Paraoxonase activity in glomerulonephritic patients.

BACKGROUND: Cardiovascular disease is the most common cause of morbidity and mortality in patients with chronic renal failure. Glomerulonephritic patients have an increased risk for cardiovascular disease, but its etiology is unclear. It is known that an increase in oxidizability of apolipoprotein B-containing lipoproteins has a key role in the initiation of atherosclerosis, and paraoxonase enzyme activity particularly has a preventive role against atherosclerosis. The aim of the present study was to evaluate the oxidizability of apolipoprotein B-containing lipoproteins, serum, and urinary paraoxonase/arylesterase activities in glomerulonephritis patients who had normal lipid parameters and creatinine levels. METHODS: Thirty-two patients with glomerulonephritis and 22 healthy controls were included in this study. A total of 32 patients (including nine with membranous GN, eight with immunoglobulin A nephropathy, eight with mesangial proliferative GN, five with focal-segmental glomerulosclerosis, one with diffuse proliferative GN, and one with minimal chance disease having biopsy proven GN) were enrolled into the study. We compared serum and urinary paraoxonase, arylesterase, serum lipids, urea, creatinine, hemoglobin, total protein and albumin values between groups. RESULTS: Serum urea, creatinine, total protein, albumin, uric acid, hemoglobin, and lipid parameters were similar in the glomerulonephritis and control groups (p > 0.05). PON1 activity was significantly lower in GN group than controls, but there was no statistically significant difference on arylesterase activity between groups. Oxidizability of apolipoprotein B-containing lipoproteins was significantly higher in GN group than controls. CONCLUSION: Our study shows that the findings of normal serum levels of creatinine, lipids, and proteins increased the oxidizability of apolipoprotein B-containing lipoproteins, and any decrease in PON1 activity in patients diagnosed with GN should be considered important. Hence, the immediate commencement of preventive as well as curative treatment in other to avoid the risk of cardiovascular and renal problems would be a correct approach.

Comparison of higher dose of losartan treatment with losartan plus carvedilol and losartan plus ramipril in patients with glomerulonephritis and proteinuria.

BACKGROUND: Proteinuria may cause a worsening of accompanying renal disease or even lead to glomerulosclerosis. There is no data about the effect of carvedilol on patients with proteinuric (>0.5 g/day) glomerulonephritis. This study aimed to compare the effects of carvedilol with ramipril and losartan in patients with proteinuric glomerulonephritis. METHODS: Twenty-one glomerulonephritis patients were followed for 12 months. Patients were divided into three groups. All patients were treated with losartan 50 mg once daily for two weeks. After two weeks (baseline), patients were given additional medications: 50 mg losartan, 5 mg ramipril, and 25 mg carvedilol were given additionally to the patients in groups 1, 2, and 3 respectively. RESULTS: Baseline mean proteinuria values of patients in groups 1, 2 and 3 were 1.6 +/- 1.1 g/day, 2.1 +/- 1.3 g/day, and 1.4 +/- 1.2 g/day, respectively. These values decreased to 0.5 +/- 0.7 g/day, 0.6 +/- 0.7 g/day, and 0.9 +/- 0.9 g/day, respectively, at the end of the 12th month. These results were statistically significant only in group 1 (p = 0.04). The rational variation of proteinuria between the first and 12th month of losartan, ramipril, and carvedilol were -61%, -62%, and -27%, respectively. The decreases in blood pressures between baseline and the first, sixth, and twelfth-month measurements were significant in all groups. CONCLUSIONS: Thee results showed that angiotensin-converting enzyme inhibitors (ACEIs) and angiotensin receptor blockers (AT1ras) provide marked decreases in proteinuria, making their use indisputable in patients with glomerulonephritis. Carvedilol was not found to be as effective as ACEIs and AT1ras in decreasing proteinuria and preserving renal function.

What is the optimal dwell time for maximizing ultrafiltration with icodextrin exchange in automated peritoneal dialysis patients?

BACKGROUND: Icodextrin is increasingly being used in automated peritoneal dialysis (APD) for the long dwell exchange to maintain adequate ultrafiltration (UF). However, the UF reported in the literature varies with different dwell times: from 200 to 500 mL with 12 - 15 hour dwells. In order to maximize UF, it is important to know the relationship between dwell time and UF when using icodextrin in APD patients. With this knowledge, decisions can be made with respect to dwell period, and adjustments to the dialysis prescription can be made accordingly. METHODS: We prospectively studied this relationship in 36 patients from Canada and Turkey. All patients did the icodextrin day exchange manually after disconnecting themselves from overnight cycler dialysis. Dwell period was increased by 1 hour every week, from 10 to 14 hours. Ultrafiltration was noted for each icodextrin exchange. Mean UF for each week (i.e., dwell period) was compared by repeated measures ANOVA. RESULTS: We found no difference in mean UF with increasing dwelt time: 351.73 +/- 250.59 mL at 10 hours versus 371.75 +/- 258.25 mL at 14 hours (p = 0.83). We also compared mean UF between different subgroups and found that males (p = 0.02 vs females) and high transporters (p = 0.04 vs low) had higher mean UF. Further analysis of maximal UF showed no correlation to age, sex, diabetic status, transport category, creatinine clearance, Kt/V, duration on peritoneal dialysis, or duration of icodextrin use. CONCLUSION: Icodextrin-related UF in APD patients is not related to demographic factors and does not increase significantly beyond 10 hours.

Laparoscopic findings of peritoneal dialysis catheter malfunction and management outcomes.

OBJECTIVE: Peritoneal dialysis catheter malfunction is a common complication forcing conversion to hemodialysis. The purpose of this study was to evaluate laparoscopic findings of catheter malfunction and to establish a relationship between those findings and the outcomes of procedures performed. DESIGN: Retrospective study. SETTING: A tertiary referral center. PATIENTS: 40 consecutive patients with stage 5 chronic kidney disease underwent 46 laparoscopic correction procedures for the treatment of peritoneal dialysis catheter malfunction between November 1994 and August 2004. MAIN OUTCOME MEASURES: Laparoscopic findings of catheter malfunction, procedures performed, catheter survival, and recurrent cases were evaluated. RESULTS: There were 28 tip migrations in 40 patients; 16 were without adhesions and 10 were associated with omental adhesions. Reposition and adhesiolysis were the most frequent procedures performed. Malfunction recurred in 12 patients and 5 of them underwent 6 secondary laparoscopic procedures. Estimated mean catheter survival was 19.9 +/-3.32 months (%95 confidence interval 13.43 - 26.46). CONCLUSIONS: The most frequent laparoscopic finding was catheter tip migration, with or without adhesions. Laparoscopic repositioning and adhesiolysis without omentectomy are simple and effective procedures that can prolong catheter survival, even in recurrent malfunctions.

Bone mineral density and its correlation with clinical and laboratory factors in chronic peritoneal dialysis patients.

The aim of this study was to assess the clinical and laboratory correlations of bone mineral density (BMD) measurements among a large population of patients on chronic peritoneal dialysis (PD). This cross-sectional, multicenter study was carried out in 292 PD patients with a mean age of 56 +/- 16 years and mean duration of PD 3.1 +/- 2.1 years. Altogether, 129 female and 163 male patients from 24 centers in Canada, Greece, and Turkey were included in the study. BMD findings, obtained by dual-energy X-ray absorptiometry (DEXA) and some other major clinical and laboratory indices of bone mineral deposition as well as uremic osteodystrophy were investigated. In the 292 patients included in the study, the mean lumbar spine T-score was -1.04 +/- 1.68, the lumbar spine Z-score was -0.31 +/- 1.68, the femoral neck T-score was -1.38 +/- 1.39, and the femoral neck Z score was -0.66 +/- 1.23. According to the WHO criteria based on lumbar spine T-scores, 19.2% of 292 patients were osteoporotic, 36.3% had osteopenia, and 44.4% had lumbar spine T-scores within the normal range. In the femoral neck area, the prevalence of osteoporosis was slightly higher (26%). The prevalence of osteoporosis was 23.3% in female patients and 16.6% in male patients with no statistically significant difference between the sexes. Agreements of lumbar spine and femoral neck T-scores for the diagnosis of osteoporosis were 66.7% and 27.3% and 83.3% for osteopenia and normal BMD values, respectively. Among the clinical and laboratory parameters we investigated in this study, the body mass index (BMI) (P < 0.001), daily urine output, and urea clearance time x dialysis time/volume (Kt/V) (P < 0.05) were statistically significantly positive and Ca x PO(4) had a negative correlation (P < 0.05) with the lumbar spine T scores. Femoral neck T scores were also positively correlated with BMI, daily urine output, and KT/V; and they were negatively correlated with age. Intact parathyroid hormone levels did not correlate with any of the BMD parameters. Femoral neck Z scores were correlated with BMI (P < 0.001), and ionized calcium (P < 0.05) positively and negatively with age, total alkaline phosphatase (P < 0.05), and Ca x P (P < 0.01). The overall prevalence of fractures since the initiation of PD was 10%. Our results indicated that, considering their DEXA-based BMD values, 55% of chronic PD patients have subnormal bone mass-19% within the osteoporotic range and 36% within the osteopenic range. Our findings also indicate that low body weight is the most important risk factor for osteoporosis in chronic PD patients. An insufficient dialysis dose (expressed as KT/V) and older age may also be important risk factors for osteoporosis of PD patients.

High prevalence of irritable bowel syndrome and upper gastrointestinal symptoms in patients with chronic renal failure.

BACKGROUND: Gastrointestinal symptoms and psychiatric disorders are common among patients with chronic renal failure since uremia affects all systems as well as the gastrointestinal tract. Irritable bowel syndrome (IBS) is a frequent functional disorder worldwide. We aimed to evaluate the frequency of IBS and upper gastrointestinal symptoms in patients with chronic renal failure (CRF). The relationships between IBS, sex and additional psychiatric disorders in the same patient group were determined and results were compared with controls. METHODS: Ninety-three hemodialysis (HD) and 35 peritoneal dialysis (PD) patients and 51 healthy volunteers were enrolled in this cross-sectional study. They completed the questionnaires that were later evaluated to determine the frequency of IBS in HD, PD and control groups; the frequency of depression and anxiety in these three groups and their relationship to sex. Symptoms of upper gastrointestinal system and their relation to sex were also investigated in all groups. RESULTS: In this study, we have demonstrated that prevalence of IBS in patients with chronic renal failure on hemodialysis or peritoneal dialysis is higher than the controls though the type of dialysis does not seem to influence the IBS prevalence itself. Epigastric pain was more prevalent in HD patients than PD patients. CONCLUSIONS: The present study suggests that though IBS is common in patients with CRF, it is generally underestimated. Type of dialysis does not seem to change the clinical picture much. Accompanying mood disorders must also be taken into consideration.

Serum levels of prostate-specific antigen and vitamin D in peritoneal dialysis patients.

Measuring the free:total ratio of prostate-specific antigen (f/t-PSA) can improve the specificity of single-serum PSA values, distinguishing between benign prostatic hyperplasia (BPH) and prostatic carcinoma (PCa) in men over the age of 50. Additionally, clinical trials have shown that dihydroxyvitamin D3 can slow the rate of PSA rise in PCa patients. However, little is known regarding the applicability of those findings in men undergoing chronic peritoneal dialysis (CPD). In the present study, we investigated the prevalence of increased serum PSA levels among CPD patients and correlated those values with serum levels of vitamin D [25-hydroxyvitamin D3 and 1,25-dihydroxyvitamin D3]. We undertook a cross-sectional study of 71 male CPD patients without a known history of prostate cancer from 24 centers in Canada, Greece, and Turkey. All of the patients were more than 50 years of age. In these patients, we measured serum concentrations of PSA, free PSA (f-PSA), total PSA (t-PSA), prostate alkaline phosphatase (PAP), 25-hydroxyvitamin D3, 1,25-dihydroxyvitamin D3, and intact parathyroid hormone (iPTH). We recorded serum PSA levels < 4 ng/mL in 62 patients (87.3%, group A) and levels > 4 ng/mL in 9 patients (12.7%, group B). The f/t-PSA ratio was < 0.25 in 16 patients (22.5%). Group B patients were older than those in group A (median: 73 years vs. 65 years, p < 0.01) and had a lower body weight (median: 66.5 kg vs. 76.7 kg, p < 0.05). We observed no statistically significant difference between the two groups for serum 1,25-dihydroxyvitamin D3 (median: 9.8 ng/mL vs. 10.1 ng/mL) or 25-hydroxyvitamin D3 (8 ng/mL vs. 8.2 ng/mL) levels. Also, we observed no correlation between vitamin D levels and f/t-PSA, but iPTH levels were significantly higher in group A (200.5 pg/mL vs. 61.2 pg/mL, p < 0.04). Also, serum PAP levels correlated significantly with PSA (r = 0.49, p = 0.01) and with f-PSA (r = 0.56, p = 0.000). Our results showed no clear relationship between vitamin D and serum levels of PSA or-of f/t-PSA in PD patients. However, further studies are needed to better define the uses of these PSA markers in PD patients because, in such patients, other relevant factors might be implicated in their predictive value.

The prevalence and clinical features of tuberculous peritonitis in CAPD patients in Turkey, report of ten cases from multi-centers.

OBJECTIVE: To determine the rate, risk factors and outcome of Tuberculous Peritonitis (TBP) in patients treated with continuous ambulatory peritoneal dialysis (CAPD) in our units. DESIGN: Retrospectively, we reviewed the medical data of all CAPD patients from 12 centers for TBP, covering the period between 1986 and December 2002. SETTING: All patients were from 12 renal clinics at tertiary-care university hospitals. RESULTS: Ten cases of TBP were identified among the CAPD patients in our centers. There were five male and five female patients with a mean age of 37.2 years. None of the patients had tuberculosis history, 6 patients had predominance of PNL. One patient had coincidental bacterial peritonitis. Two patients were successfully treated without the removal of the Tenckhoff catheter. CONCLUSION: TBP in CAPD patients is a very rare complication. In contrast to predominance of lymphocytes in nonuremic patients with tuberculous peritonitis, CAPD patients with tuberculous peritonitis may have predominance of PNL on examination of the peritoneal fluid. Since TBP has high morbidity and mortality, early diagnosis and treatment of disease are extremely important for improving outcome.

Behçet's disease and renal failure.

BACKGROUND: The aims of this study were (i) to investigate the prevalence of Behçet's disease (BD) among dialysis patients in Turkey, (ii) to report the clinical characteristics of patients with BD and end-stage renal disease (ESRD), (iii) to evaluate the effect of ESRD on course and activity of BD and (iv) to analyse the published data about BD and renal failure. METHODS: A questionnaire investigating BD among dialysis patients was submitted to 350 dialysis centres and we obtained the data for 20 596 patients from 331 dialysis centres. We submitted a second questionnaire regarding clinical characteristics of the patients with BD and ESRD. The PubMed and Web of Science databases were used for the analysis of BD and renal failure. RESULTS: Fourteen patients with BD were determined and the prevalence of BD was 0.07% among 20 596 dialysis patients in Turkey. None of the patients has had a new manifestation of BD after initiation of haemodialysis treatment. The analysis of previous data about renal BD demonstrated 67 patients with renal failure. CONCLUSIONS: The most common cause of renal failure in BD is amyloidosis. Routine urine analysis and measurement of serum creatinine and blood urea nitrogen levels are needed for early diagnosis. Vascular access-related problems are common and the activity of BD appears to decrease in patients with ESRD after initiation of haemodialysis.