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Nephrotic range proteinuria has been reported during the course of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) and coronavirus disease (COVID-19). However, the pathological mechanisms underlying this manifestation are unknown. In this article, we present two cases of collapsing glomerulopathy (CG) associated with acute tubular necrosis during the course of COVID-19, and review the literature for similar reports. In our two cases, as in the 14 cases reported so far, the patients were of African ancestry. The 14 patients assessed had an APOL1 high-risk genotype. At the end of the reported period, two patients had died and five patients were still requiring dialysis. The 16 cases detailed in the present report strongly argue in favour of a causal link between SARS-CoV-2 infection and the occurrence of CG in patients homozygous for APOL1 high-risk genotype for which the term COVID-associated nephropathy (COVIDAN) can be put forward.
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http://dx.doi.org/10.1111/imj.15041 | DOI Listing |
Turk J Pediatr
September 2025
West China School of Public Health and West China Fourth Hospital, Sichuan University, Chengdu, Sichuan, China.
Background: The α-actinin-4 (ACTN4) gene encodes an actin-binding protein, which plays a crucial role in maintaining the structure and function of podocytes. Previous studies have confirmed that ACTN4 mutations can lead to focal segmental glomerulosclerosis-1 (FSGS1), a rare disease primarily manifesting in adolescence or adulthood, characterized by mild to moderate proteinuria, with some cases progressing slowly to end-stage renal disease.
Case Presentation: We report a 12.
Indian J Nephrol
July 2024
Department of Pathology, Government Medical College Srinagar, Jammu Kashmir, India.
We report an unusual glomerulopathy with nephrotic syndrome and acute kidney injury almost two weeks after the second injection of SARS CoV-2 vaccine covishield, ChAdOx1-nCoV-19 in a 75-year-old healthy man. Kidney biopsy revealed segmental stage 1 membranous glomerulopathy and collapsing focal segmental glomerulosclerosis pattern with immune complexes on IF. Electron microscopy (EM) revealed aggregates of spherular microparticles along glomerular capillary walls.
View Article and Find Full Text PDFCureus
June 2025
Hospital Medicine, West Virginia University (WVU) Medicine, Ruby Memorial Hospital, Morgantown, USA.
This is a case of a 31-year-old Caucasian female with a new diagnosis of human immunodeficiency virus (HIV) infection. At the time of diagnosis, her helper T cell (CD4 cell) count was within normal limits, and the viral load was low (356 copies/mL). She initially presented with uncontrolled hypertension and acute kidney injury (AKI) on a background of known chronic kidney disease stage IV (CKD-IV).
View Article and Find Full Text PDFNephrology (Carlton)
July 2025
Department of Urology, Peking University First Hospital, Beijing, China.
We present a case of collapsing glomerulopathy (CG) and thrombotic microangiopathy (TMA) associated with COVID-19 in an Asian kidney transplant recipient who does not have the APOL1 gene variant, and we conduct a literature review. The patient presented with progressive renal function decline following a negative COVID-19 nucleic acid test, accompanied by TMA manifestations such as thrombocytopenia and peripheral blood schistocytes. The renal biopsy conducted after plasma exchange revealed collapsing focal segmental glomerulosclerosis, along with acute tubulointerstitial nephritis and minor microangiopathic changes.
View Article and Find Full Text PDFKidney Int Rep
June 2025
Arkana Laboratories, Little Rock, Arkansas, USA.
Introduction: Syphilis has been associated with multiple kidney diseases, primarily studied within small series. A large cohort of patients with active syphilis who underwent kidney biopsy were examined to evaluate the histopathologic spectrum and clinicopathologic features of the disease.
Methods: Patients with syphilis who underwent a native kidney biopsy were identified from renal pathology archives at Arkana Laboratories.