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Renal salvage, an achievable goal in patients with emphysematous pyelonephritis: Outcomes of an algorithmic renal preserving strategy.

ABSTRACT: Introduction:Emergency nephrectomy has been the time-honored treatment of choice for emphysematous pyelonephritis (EPN), a fatal gas-forming necrotizing infection. Recent years have seen a shift toward nonextirpative approach aimed to achieve higher rates of renal salvage, limiting the indications for nephrectomy to severe grades of the disease. This study aimed at analyzing the role of initial renal preserving measures algorithmically applied across grades of EPN. Materials and Methods:We prospectively analyzed the clinical data and outcome of 36 consecutive patients of EPN in 5 years' study period, treated by renal preserving measures, which include aggressive resuscitation, parenteral antibiotics, effective drainage of infected fluid/gas, and relieving the urinary tract obstruction. Huang-Tseng computed tomography-based classification system was used to categorize the patients as well as to employ suitable treatment modality. Results:The mean age of the patients was 57.5 ± 12 years with female preponderance (2:1). Diabetes mellitus (97%) was the most common associated factor. Escherichia coli was (72%) the most frequent causative organism found. Urinary tract obstruction was seen in 27 patients (75%) attributable to ureteric calculi, renal papillary necrosis, ureteric stricture, and fungal bezoar in the descending order of frequency. Only 2 (6%) out of 36 patients managed according to our hospital renal salvage protocol required salvage nephrectomy. The overall survival rate was 94%. Conclusion:Our hospital-based algorithmic renal preserving strategy not only improved the survival but also decreased the need for nephrectomy.

SUBMITTER: Adapala RR

PROVIDER: S-EPMC7292438 | biostudies-literature | 2020 Apr-Jun

REPOSITORIES: biostudies-literature

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Renal salvage, an achievable goal in patients with emphysematous pyelonephritis: Outcomes of an algorithmic renal preserving strategy.

Adapala Rajeshkumar Reddy RR Shetty Ranjit R Venugopal P P Prabhu G G L GGL Yalla Durgarao D Unnikrishnan B B

Urology annals 20200414 2

<h4>Introduction</h4>Emergency nephrectomy has been the time-honored treatment of choice for emphysematous pyelonephritis (EPN), a fatal gas-forming necrotizing infection. Recent years have seen a shift toward nonextirpative approach aimed to achieve higher rates of renal salvage, limiting the indications for nephrectomy to severe grades of the disease. This study aimed at analyzing the role of initial renal preserving measures algorithmically applied across grades of EPN.<h4>Materials and metho ...[more]

PMID: 32565654

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Project description:BackgroundImmunotherapy has historically been of interest in the management of metastatic renal cell cancer (mRCC) because of its relative chemoresistance and the reproducible but low incidence of spontaneous remission in metastatic disease. Recently, targeted immunotherapies in the form of checkpoint inhibitors have shown durable responses in approximately 20%-30% of patients with solid tumors, with a much more acceptable side-effect profile. Anti-programmed death receptor 1 (PD-1)/programmed death receptor ligand 1 antibodies rely on the presence of host T cells in the tumor microenvironment to be stimulated in order to activate an antitumor response. The presence of tumor antigens augments this stimulation. This has led to further research into combination therapy with anti-PD-1 inhibitors and radiotherapy, chemotherapy, or targeted therapy with the aim of increasing the response rate to these agents.Materials and methodsWe describe three cases of patients with mRCC treated with anti-PD-1 antibody therapy in combination with targeted therapy (bevacizumab), anti-cytotoxic T lymphocyte antigen 4 therapy (ipilimumab), or radiotherapy. We perform a comprehensive literature review on combination immunotherapy and the scope for the future.ResultsTwo patients had a complete clinical response within 3 months of commencing treatment. The third patient had a further significant response to radiotherapy outside the field of treatment after initial response to anti-PD-1 therapy, which lasted for over 12 months.ConclusionWe are now in the era of immunotherapy with promising results in select patients. However, the number of complete remissions with single agents are low. This report demonstrates the potential for combination therapy in mRCC to produce complete responses and improved survival rates. Whether these results equate to cure in a subset of patients requires longer follow-up. Further evaluation of dosing regimens, sequencing methods, and biomarkers to select patient population is required to advance this treatment strategy.Implications for practiceMultiple phase I-III studies exploring the benefit of combination immunotherapy are currently under way. Further research into predictive biomarkers to identify the cohort of patients who gain this benefit is pertinent. This case series demonstrates that the combination of immunotherapy with other treatments can lead to complete responses, even in patients with initially bulky disease. Combination therapy with immunotherapy seems to cause more durable responses in patients with metastatic renal cell cancer compared with monotherapy. Significantly longer follow-up is necessary to determine whether durable complete response confers a cure in a select group of patients.

Project description:IntroductionEmphysematous pyelonephritis (EPN) is a severe form of life-threatening renal infection. Conservative treatment represents the gold standard in the management of EPN, but nephrectomy remains appropriate in certain situations.ObjectiveThe aim of our study was to report our experience in the conservative management of emphysematous pyelonephritis and to identify the predictive factors of failure of conservative treatment.Patients and methodsThis is a retrospective study including all patients treated for emphysematous pyelonephritis in our department between January 2015 and December 2020. The first-line treatment was conservative based on antibiotic therapy and drainage in case of an obstructive cause. A nephrectomy was performed in case of failure of the conservative approach. Epidemiological, clinical, biological, therapeutic, and evolutionary data were collected from the patients' files. Statistical analysis was made using SPSS version 28.Results41 patients were included in our study. The mean age was 64.4 years old [28-91] with gender ratio of 0.46 (13H/28F). Diabetes mellitus was present in 75.6% of cases. The mean presentation delay was 3.28 days (Kaiser and Fournier, 2005; Kapoor et al., 2010; Aswathaman et al., 2008; Agha et al., 2020; Huang and Tseng, 2000; Falagas et al., 2007; Dutta et al., 2007; Dutta et al., 2007; Deoraj et al., 2018 Sep; Rahim et al., 2021 Mar; Maheshwari, 2021 Jul-Sep) [1-11]. In CT scan, 21 patients had class 1 EPN, 9 had class 2 EPN, 8 had class 3 EPN and 3 had class 4 EPN. The obstructive origin was found in 24 cases. Initially, 25 patients (60.9%) presented with severe sepsis and 7 patients (17.07%) developed a septic shock. Seven patients required nephrectomy with a mean delay of 2.12 days (Kapoor et al., 2010; Aswathaman et al., 2008; Agha et al., 2020; Huang and Tseng, 2000; Falagas et al., 2007) [2-6]. Five patients with septic shock refractory to conservative treatment and two patients whose evolution was marked by the occurrence of secondary septic shock. In the univariate analysis, thrombocytopenia, initially septic shock, and the need for hemodialysis were the predictive factors of failure of conservative management in patients with emphysematous pyelonephritis.ConclusionEmphysematous pyelonephritis is a serious condition with significant mortality. The optimal management is based on conservative treatment in most cases. However, patients requiring hemodialysis and with thrombocytopenia and initially septic shock should be considered candidates for emergency nephrectomy.

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Renal salvage, an achievable goal in patients with emphysematous pyelonephritis: Outcomes of an algorithmic renal preserving strategy.

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Renal salvage, an achievable goal in patients with emphysematous pyelonephritis: Outcomes of an algorithmic renal preserving strategy.

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