Objective Although recent reports have highlighted the benefits of multidisciplinary team care (MTC) for chronic kidney disease (CKD) in slowing the progress of renal insufficiency, its long-term effects have not been evaluated for patients with diabetes mellitus (DM). We compared the renal survival rate between MTC and conservative care (CC). Methods In this 5-year, single-center, prospective, observational study, we examined 24 patients (mean age 65.5±12.1 years old, men/women 18/6) with DM-induced CKD stage ! 3 in an MTC clinic. The control group included 24 random patients with DM (mean age 61.0±12.8 years old, men/ women 22/2) who received CC. MTC was provided by a nephrologist and medical staff, and CC was provided by a nephrologist. Results In total, 10 MTC and 20 CC patients experienced renal events (creatinine doubling, initiation of renal replacement therapy [RRT], or death due to end-stage CKD). During the 5-year observation period, there were significantly fewer renal events in the MTC group than in the CC group according to the cumulative incidence method (p=0.006). Compared to CC, MTC significantly reduced the need for urgent initiation of hemodialysis (relative risk reduction 0.79, 95% confidence interval [CI] 0.107-0.964). On a multivariate analysis, MTC (hazard ratio [HR], 0.434, 95% CI 0.200-0.939) and the slope of the estimated glomerular filtration rate during the first year (HR, 0.429 per 1 mL/min/m 2 /year, 95% CI 0.279-0.661) were negatively associated with renal events. Conclusion MTC for DM-induced CKD is an effective strategy for delaying RRT. Long-term MTC can demonstrate reno-protective effects.

Background Genus Desulfovibrio species is a sulphate-reducing anaerobic gram-negative rod that resides in the human oral cavity and intestinal tract. It was reported as the causative pathogen of bacteraemia and abdominal infections, but not renal cyst infection, and Desulfovibrio fairfieldensis has higher pathogenicity than other Desulfovibrio species. Case presentation A 63-year-old man was on haemodialysis for end-stage renal failure due to autosomal dominant polycystic kidney disease. On admission, he had a persistent high-grade fever, right lumbar back pain, and elevated C-reactive protein levels. His blood and urine cultures were negative. He received ciprofloxacin and meropenem; however, there was no clinical improvement. Contrast-enhanced computed tomography and plain magnetic resonance imaging revealed a haemorrhagic cyst at the upper pole of the right kidney. The lesion was drained. Although the drainage fluid culture was negative, D. fairfieldensis was detected in a renal cyst using a polymerase chain reaction. After the renal cyst drainage, he was treated with oral metronidazole and improved without any relapse. Conclusions To the best of our knowledge, this is the first reported case of a renal cyst infection with Desulfovibrio species. D. fairfieldensis is difficult to detect, and polymerase chain reaction tests can detect this bacterium and ensure better management for a successful recovery.

Background Peritoneal dialysis (PD) is associated with various complications, some of which may result in its discontinuation. Pleuroperitoneal communication (PPC) is commonly recognized by the presence of a diaphragmatic defect and pressure elevation in the abdominal cavity due to the dialysate. PPC is unpredictable and its presence prevents the continuation of PD. We present the clinical course and pathological findings of PPC in a PD patient after bacterial peritonitis and total gastrectomy for gastric neuroendocrine tumors. We provide a brief review of PD-related complications that develop due to a non-infectious pathology, including those related to catheter use and an elevated intra-abdominal pressure. Case presentation A 65-year-old Japanese man, who had been receiving PD treatment for 1 year, visited our hospital owing to a cloudy dialysate. Bacteria were detected in the dialysate. He had been previously diagnosed with gastric neuroendocrine tumors and gastrectomy had been planned. On admission, we started a 14-day antibiotic treatment for PD-related peritonitis. The patient showed a good clinical course. Gastrectomy was performed as planned, and the postoperative course was uneventful. During the perioperative period, PD was temporally changed to hemodialysis. Five weeks after the gastrectomy, PD treatment was resumed with gradual increase in the exchange volume. After returning to PD overnight, using an automated peritoneal dialysis machine, the patient complained of breathing difficulty and he gained weight. Right-sided pleural effusion was observed on a chest radiograph, and PPC was confirmed by scintigraphy when a mixture of technetium-99m and dialysate was seen entering the right hemithorax within 120 min. The patient did not consent to surgery for the PPC and he hoped to continue to receive PD treatment conservatively. We advised the patient to undergo dialysate exchange in a semi-seated position, and he was prohibited from lying down during the daytime. He continued PD treatment without signs of pleural effusion and over-volume. Conclusions This case of PPC occurring after bacterial peritonitis and total gastrectomy for gastric neuroendocrine tumors in a PD patient demonstrates the necessity of recognizing the PPC pathology in PD management and establishing methods for preventing PPC development after bacterial peritonitis or surgical procedures.

Renal involvement in eosinophilic granulomatosis with polyangiitis (EGPA) typically occurs in anti-neutrophil cytoplasmic autoantibody (ANCA)-positive cases presenting with rapidly progressive renal insufficiency and urinary abnormalities induced by primarily necrotizing crescentic glomerulonephritis (NCGN). Recently, ANCA-negative EGPA has also been reported to manifest with renal involvement, such as NCGN or non-NCGN, including membranous nephropathy (MN). Herein, we report a 70-year-old female who presented with purpura on the lower legs, upper limb numbness, renal dysfunction (eGFR, 20.5 ml/min/1.73 m2), and eosinophilia (eosinophils, 37,570/μl). MPO-and PR3-ANCA were negative, and urinalysis revealed urine protein (0.63 g/day) but without red blood cells in the urine sediment. Thus, she was diagnosed with ANCA-negative EGPA with rapidly progressive renal dysfunction. A renal biopsy revealed vasculitis in the interlobular arteries without NCGN, with the vasculitis being complicated by MN. Micrograph findings on fluorescence immunostaining contained both primary and secondary characteristics of MN (dominance of IgG subclass 4 more than subclass 1 vs. negativity of PLA2R and THSD7A). After treatment with prednisolone, her eosinophil counts normalized, and renal dysfunction improved. Furthermore, urine protein did not increase above 1.0 g/day during the clinical course. This is a rare case of ANCA-negative EGPA presenting with acute renal dysfunction without NCGN and subclinical MN with unknown etiology. It is important to recognize that EGPA pathology varies widely throughout the disease course, and the clinical course of subclinical MN should be carefully assessed in further follow-ups.

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