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Suresh D, Rastogi P, Bal A, Lad D, Naseem S, Jain A, Khadwal AR, Malhotra P. Bridging the gap: understanding contemporary autopsies in acute leukemia by comparing ante-mortem and post-mortem profiles. Leuk Lymphoma 2024:1-16. [PMID: 38949830 DOI: 10.1080/10428194.2024.2372408] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2024] [Accepted: 06/20/2024] [Indexed: 07/02/2024]
Abstract
This study investigates acute myeloid leukemia/lymphoblastic leukemia (AML/ALL) through a 14-year analysis (2009-2022) of 46 autopsied cases (age >12 years). B-ALL was the dominant subtype (34.8%). Liver and spleen were the common sites of active leukemia (63% cases). Symptoms like dyspnea and altered sensorium associated significantly with heart (p = .031) and brain leukostasis (p = .006). Measurable residual disease (MRD) negativity correlated with disease-free status outside the bone marrow, while MRD-positive cases displayed leukemic infiltrates. Infections were identified in 23 autopsied cases, notably linked to post-induction and post-transplant fatalities. Surprisingly, 18 of these 23 cases had unexpected infections mainly fungal (13 cases) with Aspergillus species as the most common. Diagnostic discrepancies were identified in 48% of cases. Malignant infiltration (46%) and infections (25%) were the leading causes of death. This research sheds light on leukemia in extra-medullary tissues, uncovers novel clinical-pathological associations, and highlights overlooked therapy side effects, offering insights for future case management.
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Affiliation(s)
- Deepthi Suresh
- Department of Pathology, Postgraduate Institute of Medical Education and Research, Chandigarh, India
| | - Pulkit Rastogi
- Department of Haematology, Postgraduate Institute of Medical Education and Research, Chandigarh, India
| | - Amanjit Bal
- Department of Histopathology, Postgraduate Institute of Medical Education and Research, Chandigarh, India
| | - Deepesh Lad
- Department of Clinical Hematology and Medical Oncology, Postgraduate Institute of Medical Education and Research, Chandigarh, India
| | - Shano Naseem
- Department of Haematology, Postgraduate Institute of Medical Education and Research, Chandigarh, India
| | - Arihant Jain
- Department of Clinical Hematology and Medical Oncology, Postgraduate Institute of Medical Education and Research, Chandigarh, India
| | - Alka Rani Khadwal
- Department of Clinical Hematology and Medical Oncology, Postgraduate Institute of Medical Education and Research, Chandigarh, India
| | - Pankaj Malhotra
- Department of Clinical Hematology and Medical Oncology, Postgraduate Institute of Medical Education and Research, Chandigarh, India
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2
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Zhou W, Qi C, Zhang M, Hou X, Ni Z. Tubular basement membrane deposits after allogeneic hematopoietic stem cell transplantation. BMC Nephrol 2023; 24:242. [PMID: 37596523 PMCID: PMC10436382 DOI: 10.1186/s12882-023-03296-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2023] [Accepted: 08/11/2023] [Indexed: 08/20/2023] Open
Abstract
BACKGROUND Extraglomerular immune complex deposition is rare and only a few membranous nephropathy cases with tubular basement membrane deposits have been reported following allogeneic hematopoietic stem cell transplantation. CASE PRESENTATION We reported a 56-year-old man with increased serum creatinine after allogeneic hematopoietic stem cell transplantation who underwent a renal biopsy. Tubular interstitial nephritis was identified on light microscope. The unique histologic features were diffuse tubular basement membrane immune complex deposition detected by both immunofluorescence and electron microscopy, while the glomerular involvement was inconspicuous. The differential diagnosis from other forms of tubular basement membrane deposition is discussed. CONCLUSION Diffuse granular tubular basement membrane immune complex deposition with minimal glomerular involvement is also a manifestation of renal complication in hematopoietic stem cell transplantation recipient. However, the exact mechanism and target antigen remains unknown.
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Affiliation(s)
- Wenyan Zhou
- Department of Nephrology, Molecular Cell Lab for Kidney Disease, Shanghai Peritoneal Dialysis Research Center, Uremia Diagnosis and Treatment Center, Ren Ji Hospital, Shanghai Jiao Tong University School of Medicine, 160 Pujian Road, Shanghai, 200127, China
| | - Chaojun Qi
- Department of Nephrology, Molecular Cell Lab for Kidney Disease, Shanghai Peritoneal Dialysis Research Center, Uremia Diagnosis and Treatment Center, Ren Ji Hospital, Shanghai Jiao Tong University School of Medicine, 160 Pujian Road, Shanghai, 200127, China
| | - Minfang Zhang
- Department of Nephrology, Molecular Cell Lab for Kidney Disease, Shanghai Peritoneal Dialysis Research Center, Uremia Diagnosis and Treatment Center, Ren Ji Hospital, Shanghai Jiao Tong University School of Medicine, 160 Pujian Road, Shanghai, 200127, China.
| | - Xiaotao Hou
- Guangzhou KingMed Center for Clinical Laboratory, Guangzhou International Biotech Island, Building 3 Standard Property Unit 3, No.10 Luoxuan 3Rd Road, Guangdong, 510005, China
| | - Zhaohui Ni
- Department of Nephrology, Molecular Cell Lab for Kidney Disease, Shanghai Peritoneal Dialysis Research Center, Uremia Diagnosis and Treatment Center, Ren Ji Hospital, Shanghai Jiao Tong University School of Medicine, 160 Pujian Road, Shanghai, 200127, China
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3
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Roy G, Iordachescu I, Royal V, Lamarche C, Ahmad I, Nadeau-Fredette AC, Laurin LP. Kidney Biopsy Findings Among Allogenic Hematopoietic Stem Cell Transplant Recipients With Kidney Injury: A Case Series. Kidney Med 2023; 5:100674. [PMID: 37492111 PMCID: PMC10363560 DOI: 10.1016/j.xkme.2023.100674] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/27/2023] Open
Abstract
Rationale and Objective The incidence of kidney disease is high in patients after allogeneic hematopoietic cell transplantation (aHCT). Although rarely performed, kidney biopsy may be useful to make a precise diagnosis because several mechanisms and risk factors can be involved, and to adjust the treatment accordingly. This case series aimed to report the spectrum of biopsy findings from patients with kidney injury after aHCT. Study Design Single-center retrospective case series. Setting and Participants All individuals who underwent a native kidney biopsy, among all adult patients who received aHCT in a tertiary hospital in Montreal (Canada) from January 1, 2010, to December 31, 2020, were identified, and the clinical data were extracted from their medical records. Results A total of 17 patients were included. Indications for biopsy included acute kidney injury (n=6), chronic kidney disease (n=5), nephrotic syndrome (n=4), and subnephrotic proteinuria (n=2). Pathologic findings from the kidney biopsy were heterogenous: 10 patients showed evidence of thrombotic microangiopathy (TMA), 5 of acute tubular injury, and 4 of membranous nephropathy. Cases of acute interstitial nephritis, BK virus nephropathy, immune complex nephropathy, focal and segmental glomerulosclerosis, minimal change disease, and karyomegalic-like interstitial nephritis were also described. Limitations There was no systematic kidney biopsy performed for all patients with kidney injury after aHCT. Only a small proportion of patients with kidney damage underwent biopsy, making the results less generalizable. Conclusions Kidney biopsy is useful in patients with kidney disease after aHCT to make a precise diagnosis and tailor therapy accordingly. This series is one of the few published studies describing pathologic findings of biopsies performed after aHCT in the context of acute kidney injury and chronic kidney disease. TMA was widely present on biopsy even when there was no clinical suspicion of such a diagnosis, suggesting that the current clinical criteria for a diagnosis of TMA are not sensitive enough for kidney-limited TMA.
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Affiliation(s)
- Guillaume Roy
- Division of Nephrology, Hôpital Maisonneuve-Rosemont, Montreal, Quebec, Canada
| | - Ilinca Iordachescu
- Division of Nephrology, Hôpital Maisonneuve-Rosemont, Montreal, Quebec, Canada
| | - Virginie Royal
- Department of Pathology, Hôpital Maisonneuve-Rosemont, Montreal, Quebec, Canada
- Department of Pathology and Cellular Biology, University of Montreal, Montreal, Quebec, Canada
| | - Caroline Lamarche
- Division of Nephrology, Hôpital Maisonneuve-Rosemont, Montreal, Quebec, Canada
- Department of Medicine, University of Montreal, Montreal, Quebec, Canada
| | - Imran Ahmad
- Division of Hematology, Hôpital Maisonneuve-Rosemont, Montreal, Quebec, Canada
- Department of Medicine, University of Montreal, Montreal, Quebec, Canada
| | - Annie-Claire Nadeau-Fredette
- Division of Nephrology, Hôpital Maisonneuve-Rosemont, Montreal, Quebec, Canada
- Department of Medicine, University of Montreal, Montreal, Quebec, Canada
| | - Louis-Philippe Laurin
- Division of Nephrology, Hôpital Maisonneuve-Rosemont, Montreal, Quebec, Canada
- Department of Medicine, University of Montreal, Montreal, Quebec, Canada
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4
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John EE, Roy S, Devasia AJ, Karuppusami R, Jose N, Mani SSR, Eapen JJ, Yusuf S, Thomas A, Valson AT, David VG, Mathews V, Biju George, Varughese S, Alexander S. Patterns of Renal Dysfunction and Profile of Kidney Biopsies in Hematopoietic Stem Cell Transplant Recipients. GLOMERULAR DISEASES 2023; 3:98-115. [PMID: 37064012 PMCID: PMC10098275 DOI: 10.1159/000529699] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/14/2022] [Accepted: 02/09/2023] [Indexed: 03/16/2023]
Abstract
Introduction Post hematopoietic stem cell transplant (HSCT), kidney can be subjected to injury by various causes. Of these, graft versus host disease (GvHD) affecting the kidney is an under-recognized entity with no clear guidelines on its diagnosis, clinicopathological manifestations, and outcomes. Material and Methods Out of 2,930 patients who underwent HSCT at our center between 2005 and 2020, kidney biopsy was performed in 19 allogenic and 5 autologous recipients. Results The mean age of the cohort at transplant was 33.2 ± 7 years, and 15 (62%) were males. Median time to kidney biopsy from HSCT was 14 (IQR, 9-30) months. Aplastic anemia was the most common underlying hematological disease (54.2%). All 19 allogenic recipients were classified based on clinicopathological manifestations into either thrombotic microangiopathy (TMA, 12/19 [63%]) or nephrotic syndrome (NS, 7/19 [37%]) pattern. Glomerular tuft "mesangiolysis" was the dominant pattern of injury noted in 9/12 cases of TMA pattern. There was a predominance of acute microangiopathic changes restricted primarily to the glomerular compartment. Of the 7 patients with NS pattern, membranous nephropathy was seen in 4 (57%) and minimal change disease in 3 (43%) patients. Thirty-nine percent (7/18) stained positive for C4d which was predominantly glomerular. Allogenic recipients who did not receive immunosuppression (IS) for renal disease had a lower eGFR at biopsy, a longer latency between withdrawal of GvHD prophylaxis and biopsy, and were significantly at a higher risk of kidney failure (IS: 2/11, 18.1% vs. no IS: 2/6, 33.3%, p = 0.04). "Associated extra-renal GvHD" occurred in 11/19 (57.9%) allogenic recipients. Patients with "associated extra-renal GvHD" had significantly more deaths (6/11, 60% vs. 0, p = 0.02) but comparable renal outcomes. Conclusion Renal GvHD can present with or without "associated extra-renal GvHD" after a prolonged period of withdrawal of GvHD prophylaxis, requiring careful diagnostic vigilance and consideration of IS.
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Affiliation(s)
| | - Sanjeet Roy
- Department of Pathology, Christian Medical College, Vellore, India
| | - Anup J. Devasia
- Department of Hematology, Christian Medical College, Vellore, India
| | - Reka Karuppusami
- Department of Biostatistics, Christian Medical College, Vellore, India
| | - Nisha Jose
- Department of Nephrology, Christian Medical College, Vellore, India
| | | | | | - Sabina Yusuf
- Department of Nephrology, Christian Medical College, Vellore, India
| | - Athul Thomas
- Department of Nephrology, Christian Medical College, Vellore, India
| | - Anna T. Valson
- Department of Nephrology, Christian Medical College, Vellore, India
| | | | - Vikram Mathews
- Department of Hematology, Christian Medical College, Vellore, India
| | - Biju George
- Department of Hematology, Christian Medical College, Vellore, India
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Raina R, Abu-Arja R, Sethi S, Dua R, Chakraborty R, Dibb JT, Basu RK, Bissler J, Felix MB, Brophy P, Bunchman T, Alhasan K, Haffner D, Kim YH, Licht C, McCulloch M, Menon S, Onder AM, Khooblall P, Khooblall A, Polishchuk V, Rangarajan H, Sultana A, Kashtan C. Acute kidney injury in pediatric hematopoietic cell transplantation: critical appraisal and consensus. Pediatr Nephrol 2022; 37:1179-1203. [PMID: 35224659 DOI: 10.1007/s00467-022-05448-x] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/13/2021] [Revised: 12/22/2021] [Accepted: 12/23/2021] [Indexed: 12/15/2022]
Abstract
Hematopoietic cell transplantation (HCT) is a common therapy for the treatment of neoplastic and metabolic disorders, hematological diseases, and fatal immunological deficiencies. HCT can be subcategorized as autologous or allogeneic, with each modality being associated with their own benefits, risks, and post-transplant complications. One of the most common complications includes acute kidney injury (AKI). However, diagnosing HCT patients with AKI early on remains quite difficult. Therefore, this evidence-based guideline, compiled by the Pediatric Continuous Renal Replacement Therapy (PCRRT) working group, presents the various factors that contribute to AKI and recommendations regarding optimization of therapy with minimal complications in HCT patients.
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Affiliation(s)
- Rupesh Raina
- Akron Nephrology Associates/Cleveland Clinic Akron General Medical Center, Akron, OH, USA.
- Department of Nephrology, Akron Children's Hospital, Akron, OH, USA.
| | - Rolla Abu-Arja
- Division of Hematology, Oncology, Blood and Bone Marrow Transplant, Nationwide Children's Hospital, Columbus, OH, USA
- Department of Pediatrics, The Ohio State University College of Medicine, Columbus, OH, USA
| | - Sidharth Sethi
- Pediatric Nephrology, Kidney Institute, Medanta, The Medicity Hospital, Gurgaon, Haryana, India
| | - Richa Dua
- Monmouth Medical Center, Long Branch, NJ, USA
| | - Ronith Chakraborty
- Akron Nephrology Associates/Cleveland Clinic Akron General Medical Center, Akron, OH, USA
| | - James T Dibb
- Department of Internal Medicine, Summa Health System - Akron Campus, Akron, OH, USA
| | - Rajit K Basu
- Children's Healthcare of Atlanta, Division of Critical Care Medicine, Department of Pediatrics, Emory University School of Medicine, Atlanta, GA, USA
| | - John Bissler
- Department of Pediatrics, University of Tennessee Health Science Center and Le Bonheur Children's Hospital, Memphis, TN, USA
| | - Melvin Bonilla Felix
- Department of Pediatrics, University of Puerto Rico, Medical Sciences Campus, San Juan, Puerto Rico
| | - Patrick Brophy
- Department of Pediatrics, University of Rochester School of Medicine, Rochester, NY, USA
| | - Timothy Bunchman
- Pediatric Nephrology & Transplantation, Children's Hospital of Richmond at VCU, Richmond, VA, USA
| | - Khalid Alhasan
- Department of Pediatrics, College of Medicine, King Saud University, Riyadh, Saudi Arabia
| | - Dieter Haffner
- Department of Pediatric Kidney, Liver and Metabolic Diseases, Hannover Medical School, Hannover, Germany
| | - Yap Hui Kim
- Department of Pediatrics, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore
- Khoo Teck Puat-National University Children's Medical Institute, National University Hospital, Singapore, Singapore
| | - Christopher Licht
- Division of Nephrology, The Hospital for Sick Children, University of Toronto, Toronto, ON, Canada
| | - Mignon McCulloch
- Red Cross War Memorial Children's Hospital, University of Cape Town, Cape Town, South Africa
| | - Shina Menon
- Division of Pediatric Nephrology, Department of Pediatrics, Seattle Children's Hospital, University of Washington School of Medicine, Seattle, WA, USA
| | - Ali Mirza Onder
- Division of Pediatric Nephrology, Le Bonheur Children's Hospital, University of Tennessee, School of Medicine, Memphis, TN, USA
- Division of Pediatric Nephrology, Batson Children's Hospital of Mississippi, University of Mississippi Medical Center, Jackson, MS, USA
| | - Prajit Khooblall
- Department of Medicine, Northeast Ohio Medical University, Rootstown, OH, USA
| | - Amrit Khooblall
- Akron Nephrology Associates/Cleveland Clinic Akron General Medical Center, Akron, OH, USA
| | - Veronika Polishchuk
- Division of Hematology, Oncology, Blood and Bone Marrow Transplant, Nationwide Children's Hospital, Columbus, OH, USA
- Department of Pediatrics, The Ohio State University College of Medicine, Columbus, OH, USA
| | - Hemalatha Rangarajan
- Division of Hematology, Oncology, Blood and Bone Marrow Transplant, Nationwide Children's Hospital, Columbus, OH, USA
- Department of Pediatrics, The Ohio State University College of Medicine, Columbus, OH, USA
| | - Azmeri Sultana
- Department of Pediatric Nephrology, MR Khan Hospital & Institute of Child Health, Mirpur-2, Dhaka, Bangladesh
| | - Clifford Kashtan
- Department of Pediatrics, Division of Pediatric Nephrology, University of Minnesota Medical School, Minneapolis, MN, USA
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6
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Transplant-associated thrombotic microangiopathy: theoretical considerations and a practical approach to an unrefined diagnosis. Bone Marrow Transplant 2021; 56:1805-1817. [PMID: 33875812 PMCID: PMC8338557 DOI: 10.1038/s41409-021-01283-0] [Citation(s) in RCA: 41] [Impact Index Per Article: 13.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2020] [Revised: 03/08/2021] [Accepted: 03/24/2021] [Indexed: 02/07/2023]
Abstract
Transplant-associated thrombotic microangiopathy (TA-TMA) is an increasingly recognized complication of hematopoietic stem cell transplant (HSCT) with high morbidity and mortality. The triad of endothelial cell activation, complement dysregulation, and microvascular hemolytic anemia has the potential to cause end organ dysfunction, multiple organ dysfunction syndrome and death, but clinical features mimic other disorders following HSCT, delaying diagnosis. Recent advances have implicated complement as a major contributor and the therapeutic potential of complement inhibition has been explored. Eculizumab has emerged as an effective therapy and narsoplimab (OMS721) has been granted priority review by the FDA. Large studies performed mostly in pediatric patients suggest that earlier recognition and treatment may lead to improved outcomes. Here we present a clinically focused summary of recently published literature and propose a diagnostic and treatment algorithm.
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Pedersen SJV, Monagel DA, Mammen C, Lewis VA, Guilcher GMT, Bruce AA. Stable renal function in children and adolescents with sickle cell disease after nonmyeloablative hematopoietic stem cell transplantation. Pediatr Blood Cancer 2020; 67:e28568. [PMID: 32672896 DOI: 10.1002/pbc.28568] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/15/2019] [Revised: 06/22/2020] [Accepted: 06/23/2020] [Indexed: 12/11/2022]
Abstract
BACKGROUND Sickle cell disease (SCD) is associated with renal complications starting as early as infancy. Allogeneic hematopoietic stem cell transplant (HSCT) treatments using newer nonmyeloablative (NMA) conditioning regimens show promising results in treating SCD in the pediatric population, but renal outcome parameters after transplantation have not been described. AIM To describe baseline renal parameters as well as short- and long-term renal outcomes in pediatric patients with SCD who underwent NMA-HSCT. METHODS A retrospective chart review of pediatric patients who received NMA-HSCT in Alberta, Canada. Short-term renal outcomes evaluated were: (1) acute kidney injury (AKI), (2) fluid overload (FO), and (3) hypertension. Long-term outcomes evaluated were: (1) estimated glomerular filtration rate (eGFR) development and at last follow-up with hyperfiltration defined as eGFR ≥ 150 mL/min/1.73 m2 , (2) proteinuria, and (3) hypertension. RESULTS The mean follow-up time was 128.6 weeks (standard deviations, 69.3). No posttransplant AKI events or FO were observed. eGFR remained > 90 mL/min/1.73 m2 at last follow-up in all patients, whereas hyperfiltration was present in eight (44.4%) and four (22.2%) patients pre- and post-HSCT, respectively, which are significantly different (P < 0.0001). Consequently, median GFR was significantly higher pre-HSCT compared with 24 months HSCT (P < 0.009). Long-term hypertension post-HSCT was present in six patients (33.3%). CONCLUSION This study describes stable kidney function in children with SCD after NMA-HSCT without evidence of AKI or FO episodes. Rates of hyperfiltration decreased post-HSCT, which signifies that NMA-HSCT could potentially preserve long-term renal function in this population at risk of progressive chronic kidney disease. Further prospective studies are needed to confirm these novel findings.
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Affiliation(s)
- Sasia J V Pedersen
- Department of Pediatrics, Division of Immunology, Hematology/Oncology and Palliative Care, Stollery Children's Hospital, Edmonton, AB, Canada
| | - Dania A Monagel
- Departments of Oncology and Pediatrics, Alberta Children's Hospital, University of Calgary, Calgary, AB, Canada
| | - Cherry Mammen
- Department of Pediatrics, Division of Nephrology, British Columbia Children's Hospital, Vancouver, BC, Canada
| | - Victor A Lewis
- Departments of Oncology and Pediatrics, Alberta Children's Hospital, University of Calgary, Calgary, AB, Canada
| | - Gregory M T Guilcher
- Departments of Oncology and Pediatrics, Alberta Children's Hospital, University of Calgary, Calgary, AB, Canada
| | - Aisha A Bruce
- Department of Pediatrics, Division of Immunology, Hematology/Oncology and Palliative Care, Stollery Children's Hospital, Edmonton, AB, Canada
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8
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Gray PE, McCarthy H, Siggs OM, Saleem MA, O' Brien T, Frith K, Ziegler JB, Kitching AR, Fogo AB, Hudson BG, Pedchenko V. Molecular Analysis of Goodpasture's Disease Following Hematopoietic Stem Cell Transplant in a Pediatric Patient, Recalls the Conformeropathy of Wild-Type Anti-GBM Disease. Front Immunol 2019; 10:2659. [PMID: 31798588 PMCID: PMC6868084 DOI: 10.3389/fimmu.2019.02659] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2019] [Accepted: 10/28/2019] [Indexed: 11/28/2022] Open
Abstract
Background: Goodpasture's disease (GP) is mediated by autoantibodies that bind the glomerular and alveolar basement membrane, causing rapidly progressive glomerulonephritis with or without pulmonary hemorrhage. The autoantibodies bind neoepitopes formed upon disruption of the quaternary structure of α345NC1 hexamer, a critical structural domain of α345 collagen IV scaffolds. Hexamer disruption leads to a conformational changes that transitions α3 and α5NC1 subunits into immunogens, however, the trigger remains unknown. This contrasts with another anti-GBM disease, Alports' post-transplant nephritis (APTN), where the pathogenic alloantibody binds directly to native NC1 hexamer. The current report includes the first study of antigenic specificity and allo-incompatability in anti-GBM disease occurring after allogeneic haematopoietic stem cell transplant (HSCT). Results: The anti-GBM antibodies were found to be directed predominantly against the EA epitope of the α3 NC1 monomer of collagen IV and developed rapidly in patient serum reaching peak level within 5 weeks. Autoantibody binding to native α345NC1 hexamer was minimal; however, binding was greatly increased upon dissociation of the native hexamer. There were no polymorphic genetic differences between donor and recipient collagen IV genes which would be predicted to cause a significant NC1 conformational change or to provide a target for antibody binding. Both patient and donor possessed the Goodpasture's susceptibility HLA-allele DRB1*1501. Conclusions: The current report includes the first in-depth study of allo-incompatability and antigenic specificity in anti-GBM disease occurring after allogeneic haematopoietic stem cell transplant (HSCT). No polymorphic genetic differences were identified between donor and recipient collagen IV genes which would be predicted to provide a target for antibody binding. Furthermore, autoantibody binding to native α345NC1 hexamer was minimal, increasing greatly upon dissociation of the native hexamer, resembling wild-type GP diseases and marking this as the first example of a post-HSCT conformeropathy.
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Affiliation(s)
- Paul E Gray
- Department of Immunology and Infectious Diseases, Sydney Children's Hospital, Sydney, NSW, Australia.,Faculty of Medicine, School of Women's and Children's Health, University of New South Wales, Sydney, NSW, Australia
| | - Hugh McCarthy
- Department of Nephrology, Sydney Children's Hospital, Sydney, NSW, Australia
| | - Owen M Siggs
- Immunology Division, Garvan Institute of Medical Research, Darlinghurst, NSW, Australia
| | - Moin A Saleem
- Faculty of Health Sciences, Bristol Medical School, University of Bristol, Bristol, United Kingdom
| | - Tracy O' Brien
- Faculty of Medicine, School of Women's and Children's Health, University of New South Wales, Sydney, NSW, Australia.,Kid's Cancer Centre, Sydney Children's Hospital, Sydney, NSW, Australia
| | - Katie Frith
- Department of Immunology and Infectious Diseases, Sydney Children's Hospital, Sydney, NSW, Australia
| | - John B Ziegler
- Department of Immunology and Infectious Diseases, Sydney Children's Hospital, Sydney, NSW, Australia.,Faculty of Medicine, School of Women's and Children's Health, University of New South Wales, Sydney, NSW, Australia
| | - A Richard Kitching
- Faculty of Medicine, Nursing & Health Sciences, Centre for Inflammatory Diseases, Monash University, Clayton, VIC, Australia
| | - Agnes B Fogo
- Department of Pediatrics, Vanderbilt University School of Medicine, Nashville, TN, United States.,Department of Pathology, Microbiology and Immunology, Vanderbilt University School of Medicine, Nashville, TN, United States.,Division of Nephrology, Department of Medicine, Vanderbilt University Medical Center, Nashville, TN, United States
| | - Billy G Hudson
- Department of Pathology, Microbiology and Immunology, Vanderbilt University School of Medicine, Nashville, TN, United States.,Division of Nephrology, Department of Medicine, Vanderbilt University Medical Center, Nashville, TN, United States.,Department of Biochemistry, Vanderbilt University School of Medicine, Nashville, TN, United States
| | - Vadim Pedchenko
- Division of Nephrology, Department of Medicine, Vanderbilt University Medical Center, Nashville, TN, United States
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9
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Drachenberg CB, Papadimitriou JC, Chandra P, Haririan A, Mendley S, Weir MR, Rubin MF. Epidemiology and Pathophysiology of Glomerular C4d Staining in Native Kidney Biopsies. Kidney Int Rep 2019; 4:1555-1567. [PMID: 31890997 PMCID: PMC6933466 DOI: 10.1016/j.ekir.2019.07.015] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2019] [Revised: 07/12/2019] [Accepted: 07/15/2019] [Indexed: 12/22/2022] Open
Abstract
Introduction Routine C4d staining in renal transplantation has stimulated its use in kidney biopsies with glomerulonephritis (GN). Methodical description on staining patterns in the native kidney is not available. Methods We retrospectively evaluated C4d staining in formalin-fixed paraffin-embedded sections from 519 native kidney biopsies (bx) with and without glomerular disease. Results Strong C4d staining was consistently present in immune-complex GN, including lupus nephritis (LN) (n = 68), membranous GN (n = 24), membranoproliferative glomerulonephritis (MPGN) pattern (n = 22), fibrillary GN (n = 3), and proliferative GN with monoclonal IgG (n = 3). C4d stained all cases of postinfectious GN (n = 7) amyloidosis (n = 20) and C1q GN (n = 3). In contrast, IgA nephropathy (IgAN) (n = 34), was negative in 62% of bx, with the rest staining variably. The E1 Oxford classification score correlated with capillary wall C4d staining (P = 0.05). C4d marked the glomerular and arteriolar lesions in thrombotic microangiopathy (TMA; n = 16), the glomerular sclerotic segments in focal segmental glomerulosclerosis (FSGS; n = 77), and marked areas of necrosis in crescentic GN (n = 21). In diabetic glomerulopathy (n = 70), C4d marked advanced insudative lesions but was negative otherwise. C4d weakly stained the mesangium, or was negative in normal biopsies (n = 13), minimal change disease (MCD; n = 21), thin basement membrane disease (n = 20), Alport (n = 3), IgM nephropathy (n = 2), C3 glomerulopathy (n = 5), acute interstitial nephritis (n = 12), acute tubular necrosis (n = 22), ischemic glomerulopathy/nephrosclerosis (n = 23), and other miscellaneous processes (n = 14). Staining in tubular basement membranes and peritubular capillaries was most common in lupus. Conclusion Based on reliable staining in lupus and membranous GN, C4d staining is potentially useful as a screening and diagnostic tool, if only paraffin-embedded tissue is available. Knowledge of C4d staining patterns in normal and pathological tissues enhances its diagnostic value.
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Affiliation(s)
- Cinthia B. Drachenberg
- Department of Pathology, University of Maryland School of Medicine, Baltimore, Maryland, USA
- Correspondence: Cinthia B. Drachenberg, Department of Pathology, Electron Microscopy Laboratory, University of Maryland Hospital, 22 South Greene Street, NBW49, Baltimore, Maryland 21201, USA.
| | - John C. Papadimitriou
- Department of Pathology, University of Maryland School of Medicine, Baltimore, Maryland, USA
| | - Preeti Chandra
- Department of Medicine, Division of Nephrology, University of Maryland School of Medicine, Baltimore, Maryland, USA
| | - Abdolreza Haririan
- Department of Medicine, Division of Nephrology, University of Maryland School of Medicine, Baltimore, Maryland, USA
| | - Susan Mendley
- Department of Pediatrics, Division of Nephrology, University of Maryland School of Medicine, Baltimore, Maryland, USA
| | - Matthew R. Weir
- Department of Medicine, Division of Nephrology, University of Maryland School of Medicine, Baltimore, Maryland, USA
| | - Mario F. Rubin
- Department of Medicine, Division of Nephrology, University of Maryland School of Medicine, Baltimore, Maryland, USA
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10
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Perrone ME, Chang A, Henriksen KJ. Medical renal diseases are frequent but often unrecognized in adult autopsies. Mod Pathol 2018; 31:365-373. [PMID: 28984299 DOI: 10.1038/modpathol.2017.122] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2017] [Revised: 07/27/2017] [Accepted: 08/01/2017] [Indexed: 02/02/2023]
Abstract
Kidney diseases affect many hospitalized patients and contribute to morbidity and mortality. Therefore, kidney disease should be prevalent, but the frequency and spectrum of medical renal pathology in autopsy specimens has not been well documented. We sought to determine the spectrum of medical renal pathology in adult autopsy specimens and the frequency of overlooked diagnoses. We reviewed the hematoxylin- and eosin-stained kidney sections from 140 adult autopsies performed at a large teaching hospital over a 2-year period. Fifty-eight cases (41%) had findings warranting further analysis, including alterations in glomerular matrix and/or cellularity, atypical or pigmented casts, thrombi, tubulointerstitial or vascular inflammation, or deposition of amorphous material. After additional studies and clinical correlation, the pathologic changes in 43 cases (31%) were categorized as follows: diabetic nephropathy, bile cast nephropathy, thrombotic microangiopathy, infection-related glomerulonephritis, focal necrotizing/crescentic glomerulonephritis, oxalate nephropathy, light-chain cast nephropathy, amyloidosis, urate nephropathy, hemosiderosis, antineutrophil cytoplasmic antibody-associated vasculitis, polyoma virus nephropathy, atheroembolic disease, and nephrocalcinosis. These diagnoses were not reported in 26 (60%) cases during the initial autopsy evaluation. This study demonstrates that medical renal diseases are common in autopsy cases, but significant diagnoses can be easily overlooked. Autopsy kidney specimens are a rich source of renal pathology and their evaluation should be emphasized in anatomic pathology residency training. Ultimately, our understanding of how kidney disease contributes to morbidity and mortality will benefit from accurate recognition of renal pathology in autopsy specimens.
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Affiliation(s)
- Marie E Perrone
- Department of Pathology, The University of Washington, Seattle, WA, USA
| | - Anthony Chang
- Department of Pathology, The University of Chicago, Chicago, IL, USA
| | - Kammi J Henriksen
- Department of Pathology, The University of Chicago, Chicago, IL, USA
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11
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Al-Hussaini H, Kilarkaje N. Trans-resveratrol mitigates type 1 diabetes-induced oxidative DNA damage and accumulation of advanced glycation end products in glomeruli and tubules of rat kidneys. Toxicol Appl Pharmacol 2017; 339:97-109. [PMID: 29229234 DOI: 10.1016/j.taap.2017.11.025] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2017] [Revised: 11/17/2017] [Accepted: 11/28/2017] [Indexed: 12/15/2022]
Abstract
Hyperglycemia induces the formation of advanced glycation end products (AGEs) and their receptors (RAGEs), which alter several intracellular signaling mechanisms leading to the onset and progression of diabetic nephropathy. The present study focused on, i) modulatory effects of trans-resveratrol (3,5,4'-trihydroxy-trans-stilbene) on structural changes, AGE (NƐ-carboxymethyl-lysine), RAGE, oxidative stress and DNA damage, and apoptosis, and ii) localization of fibrotic changes, AGE, RAGE, 8-oxo-dG and 4-hydroxynonenal (4-HNE) in diabetic rat kidneys. Resveratrol (5mg/kg; po, administered during last 45days of 90-day-long hyperglycemic period) administration to streptozotocin-induced type 1 diabetic male Wistar rats reduced renal hypertrophy and structural changes (tubular atrophy, mesangial expansion or shrinkage, diffuse glomerulonephritis, and fibrosis), AGE accumulation, oxidative stress and DNA damage (8-oxo-dG), 4-HNE, caspase-3, and cleaved-caspase-3, but not the RAGE expression. The AGE accumulated in the mesangium, vascular endothelium, and proximal convoluted tubules and less intensely in distal convoluted tubules of diabetic rat kidneys. The RAGE expression increased in the convoluted tubules and collecting ducts of diabetic rat kidneys, but not in the mesangium. Diabetes increased the expression of 8-oxo-dG in nuclei and cytoplasm of renal cells, and 4-HNE in glomeruli, convoluted tubules, the loops of Henle and collecting ducts. Hyperglycemia-induced AGE-RAGE axis and oxidative stress in turn induced apoptosis in diabetic kidneys. Resveratrol mitigated all diabetic effects except the RAGE expression. In conclusion, Resveratrol significantly alleviates diabetes-induced glycation, oxidative damage, and apoptosis to inhibit the progression of diabetic nephropathy. Resveratrol supplementation may be useful to hinder the onset and progression of diabetic kidney diseases.
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Affiliation(s)
- Heba Al-Hussaini
- Department of Anatomy, Faculty of Medicine, Kuwait University, Kuwait
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12
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Girsberger M, Halter JP, Hopfer H, Dickenmann M, Menter T. Kidney Pathology after Hematologic Cell Transplantation-A Single-Center Observation Study of Indication Biopsies and Autopsies. Biol Blood Marrow Transplant 2017; 24:571-580. [PMID: 29155318 DOI: 10.1016/j.bbmt.2017.11.008] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2017] [Accepted: 11/08/2017] [Indexed: 12/11/2022]
Abstract
Hematopoietic cell transplantation (HCT) is an increasingly used treatment for hematologic malignancies as well as for nonmalignant diseases. Kidney impairment remains an important early and late post-transplantation complication. Although numerous histopathological changes have been reported, the pathophysiology remains incompletely understood. Furthermore, correlations between clinical findings and morphological changes have not been well studied. Between 2000 and 2016, 17 recipients of allogeneic (n = 12) or autologous (n = 5) HCT underwent kidney biopsy for either proteinuria or deterioration of kidney function at our center. The most common biopsy findings were therapy-related changes with thrombotic microangiopathy (n = 5), calcineurin inhibitor toxicity (n = 4), and membranous glomerulonephritis (n = 3), representing the majority of cases in this category. In addition, kidney findings from 137 autopsies performed between 1995 and March 2017 were analyzed. The most common changes were acute kidney injury (n = 55), most likely due to the patients' premortal deteriorated state, and thrombotic microangiopathy (n = 14). Several cases demonstrated involvement by either infectious agents (n = 6) or tumors (n = 9). Distinct kidney diseases, such as glomerulonephritis, were rare (3% of cases). Uncommon and yet rarely described diagnoses for this patient cohort were IgG4-related tubulointerstitial nephritis and fibrillary nephritis. This study provides a comprehensive overview of the histomorphological findings in kidney biopsy specimens from HCT recipients. Along with treatment-related complications, one putative correlate of chronic GVHD of the kidney could be documented: membranous glomerulonephritis. In contrast, no morphological correlate of acute GVHD of the kidney was identified. Findings at the time of autopsy varied greatly, spanning a wider range than those of indication biopsies.
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Affiliation(s)
- Michael Girsberger
- Clinic for Transplantation Immunology and Nephrology, University Hospital of Basel, Basel, Switzerland
| | - Jörg P Halter
- Department of Hematology, University Hospital of Basel, Basel, Switzerland
| | - Helmut Hopfer
- Institute of Medical Genetics and Pathology, University Hospital of Basel, Basel, Switzerland
| | - Michael Dickenmann
- Clinic for Transplantation Immunology and Nephrology, University Hospital of Basel, Basel, Switzerland
| | - Thomas Menter
- Institute of Medical Genetics and Pathology, University Hospital of Basel, Basel, Switzerland.
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13
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Masuzawa N, Nishimura A, Kitani T, Tamagaki K, Sugitani M, Nagoshi H, Kuroda J, Konishi E. A Case of the nephrotic syndrome in bone marrow transplantation recipient, histologically showing overlapped glomerular lesions of thrombotic microangiopathy and membranous nephropathy. Pathol Int 2017; 67:620-625. [PMID: 28940837 DOI: 10.1111/pin.12589] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2017] [Accepted: 08/24/2017] [Indexed: 11/30/2022]
Abstract
Nephrotic syndrome (NS) rarely occurs in post-hematopoietic stem cell transplantation (HSCT) recipients but represents the renal manifestation of graft-versus-host disease (GVHD). Membranous nephropathy (MN) accounts for almost two thirds of post-HSCT NS and is caused by immune complex deposition. Renal thrombotic microangiopathy (TMA) without fulfillment of clinical criteria for TMA has been underreported because of reduced opportunity for histological examination. However, renal TMA has recently been reported in association with GVHD and humoral immunological reactions. Although both MN and TMA after HSCT are associated with GVHD and immunological abnormalities, these diseases are exceptionally coexistent in renal biopsy specimens. We herein describe a case of post-HSCT NS, histologically showing overlapped lesions of TMA and MN. Renal biopsy specimen after presentation of NS revealed early stage MN and TMA with evidence of chronicity. TMA was thought to have preceded MN, and renal biopsy at the phase of pre-nephrotic proteinuria might reveal earlier histological changes of isolated renal TMA. Detection of subclinical renal TMA earlier by spontaneous renal biopsy can help prevent progression of renal injury or overlapping of other renal pathologies. We also demonstrated Th2 predominant intraglomerular infiltration of lymphocytes by immunohistochemistry.
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Affiliation(s)
- Naoko Masuzawa
- Division of Surgical Pathology, Department of Pathology, Kyoto Prefectural University of Medicine, Kyoto, Japan.,Department of Diagnostic Pathology, Otsu City Hospital, Shiga, Japan
| | - Ayako Nishimura
- Division of Surgical Pathology, Department of Pathology, Kyoto Prefectural University of Medicine, Kyoto, Japan
| | - Takashi Kitani
- Division of Cardiovascular Medicine and Nephrology, Department of Medicine, Kyoto Prefectural University of Medicine, Kyoto, Japan
| | - Keiichi Tamagaki
- Division of Cardiovascular Medicine and Nephrology, Department of Medicine, Kyoto Prefectural University of Medicine, Kyoto, Japan
| | - Mio Sugitani
- Division of Hematology and Oncology, Department of Medicine, Kyoto Prefectural University of Medicine, Kyoto, Japan
| | - Hisao Nagoshi
- Division of Hematology and Oncology, Department of Medicine, Kyoto Prefectural University of Medicine, Kyoto, Japan
| | - Junya Kuroda
- Division of Hematology and Oncology, Department of Medicine, Kyoto Prefectural University of Medicine, Kyoto, Japan
| | - Eiichi Konishi
- Division of Surgical Pathology, Department of Pathology, Kyoto Prefectural University of Medicine, Kyoto, Japan
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14
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Mirza AS, Verma S, Fu L, Bassil C. Thrombotic Microangiopathy With Granulomatosis Interstitial Nephritis in an Allogenic Bone Marrow Transplant Patient: A Case Report and Review of the Literature. J Hematol 2017; 6:52-58. [PMID: 32300393 PMCID: PMC7155822 DOI: 10.14740/jh326e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2017] [Accepted: 04/27/2017] [Indexed: 11/24/2022] Open
Abstract
Transplant-associated thrombotic microangiopathy (TA-TMA) is a rare complication of hematopoietic stem cell transplantation (HSCT) with variable presentations. TA-TMA has often been described as a diagnosis of exclusion but a renal biopsy is rarely pursued to confirm the diagnosis, an essential step for our patient with renally limited TMA. We report a case report from the onconephrology clinic and review the literature associated with TA-TMA as it relates to diagnosis and treatment. A 45-year-old woman with acute myeloid leukemia and stage 3 chronic kidney disease underwent a matched unrelated donor allogenic HSCT. Postoperatively, she developed gastrointestinal graft versus host disease (GvHD) and was treated with tacrolimus, sirolimus, budesonide, and beclomethasone. Following discharge, she developed uncontrolled hypertension and required losartan, amlodipine, carvedilol, clonidine patch, and hydralazine as needed. On day 180 post-transplant, she developed lower extremity edema and acute kidney injury (AKI) with creatinine increasing to 2 mg/dL. On day 480 post-transplant, she developed worsening thrombocytopenia, anemia, new hematuria, left flank pain, and worsening renal function with creatinine peaking to 6 mg/dL. Peripheral smear revealed no schistocytes, lactate dehydrogenase of 265 mg/dL, and urinalysis with 100 mg/dL protein. ADAMTS 13 activity was normal (92%) and no inhibitor was detected. She became anuric and was started on hemodialysis. Renal biopsy revealed glomerular changes consistent with TA-TMA. During HSCT, systemic vascular endothelial injury triggers microangiopathic hemolytic anemia, platelet consumption, injury of glomerular endothelial cells and fibrin occluded renal capillaries. Thus, TA-TMA should be considered in HSCT patients with elevated LDH, proteinuria, hypertension, and AKI. However, a diagnosis is difficult to confirm without a renal biopsy. Treatment involves discontinuing potentially toxic agents such as calcineurin inhibitors and sirolimus, prescribing adequate antimicrobial treatment, and using renal replacement therapy if needed. A renal biopsy early in the course of disease not only confirms the diagnosis, but may limit the extent of disease.
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Affiliation(s)
- Abu-Sayeef Mirza
- Department of Internal Medicine, University of South Florida, Tampa, FL, USA
| | - Sean Verma
- Department of Internal Medicine, University of South Florida, Tampa, FL, USA
| | - Liying Fu
- Department of Pathology, Tampa General Hospital, Tampa, FL, USA
| | - Claude Bassil
- Department of Onconephrology, Moffitt Cancer Center, Tampa, FL, USA
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15
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Kheder El-Fekih R, Deltombe C, Izzedine H. [Thrombotic microangiopathy and cancer]. Nephrol Ther 2017; 13:439-447. [PMID: 28774729 DOI: 10.1016/j.nephro.2017.01.023] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2016] [Revised: 01/03/2017] [Accepted: 01/05/2017] [Indexed: 01/28/2023]
Abstract
Thrombotic microangiopathy (TMA) is a group of disorders characterized by mechanical hemolytic anemia with thrombocytopenia and an ischemic organic lesion of variable and potentially fatal importance affecting mostly the kidneys and the brain with histologically a disseminated and occlusive microvasculopathy. The incidence of TMA represents 15% of acute kidney failure in oncological setting, largely due to the introduction of anti-angiogenic agents over the past decade. It may be more rarely related to cancer itself. The iatrogenic TMA can be classified into 2 types: The type I, secondary to chemotherapy (mitomycinC, gemcitabine), exposes to a chronic dose-dependent renal injury as well as an increase in morbidity and mortality; iatrogenic type II, secondary to anti-angiogenic agents', results in a dose-independent renal involvement and renal functional recovery is usual when the drug is discontinued. There is no randomized controlled trial to establish EBM-type management in TMA support. However, complement activation pathways and regulatory factors analyses allowed us to understand the mechanisms of endothelial lesions. As a result, the current trend includes the use of immunosuppressive agents in recurrent or plasmapheresis-refractory MAT.
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Affiliation(s)
| | - Clément Deltombe
- Service de néphrologie, immunologie clinique, transplantation, CHU Hôtel-Dieu, Place Alexis-Ricordeau, 44000 Nantes, France
| | - Hassan Izzedine
- Clinique internationale du Parc Monceau, 21, rue de Chazelles, 75017 Paris, France.
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16
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Antineoplastic Treatment and Renal Injury: An Update on Renal Pathology Due to Cytotoxic and Targeted Therapies. Adv Anat Pathol 2016; 23:310-29. [PMID: 27403615 DOI: 10.1097/pap.0000000000000122] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Cancer patients experience kidney injury from multiple sources, including the tumor itself, diagnostic procedures, hypovolemia, infection, and drug exposure, superimposed upon baseline chronic damage. This review will focus on cytotoxic or targeted chemotherapy-associated renal injury. In this setting, tubulointerstitial injury and thrombotic microangiopathy (vascular injury) are more common than other forms of kidney injury including glomerular. Cisplatin, pemetrexed, and ifosfamide are well-known causes of acute tubular injury/necrosis. Acute interstitial nephritis seems underrecognized in this clinical setting. Interstitial nephritis is emerging as an "immune-related adverse effect" (irAE's) with immune checkpoint inhibitors in small numbers of patients. Acute kidney injury is rarely reported with targeted therapies such as BRAF inhibitors (vemurafinib, dabrafenib), ALK inhibitors (crizotinib), and mTOR inhibitors (everolimus, temsirolimus), but additional biopsy data are needed. Tyrosine kinase inhibitors and monoclonal antibodies that block the vascular endothelial growth factor pathway are most commonly associated with thrombotic microangiopathy. Other causes of thrombotic microangiopathy in the cancer patients include cytotoxic chemotherapies such as gemcitabine and mitomycin C, hematopoietic stem cell transplant, and cancer itself (usually high-stage adenocarcinoma with marrow and vascular invasion). Cancer patients are historically underbiopsied, but biopsy can reveal type, acuity, and chronicity of renal injury, and facilitate decisions concerning continuation of chemotherapy and/or initiation of renoprotective therapy. Biopsy may also reveal unrelated and unanticipated findings in need of treatment.
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