Postmortem Histopathologic Findings and SARS-CoV-2 Detection in Autopsy Kidneys of Patients With COVID-19: A Systematic Review and Meta-Analysis.

OBJECTIVES: This systematic review and meta-analysis aimed to investigate the prevalence of postmortem kidney histopathologic features of patients with coronavirus disease 2019 (COVID-19) in addition to the rate of renal tropism in severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2). METHODS: We searched Web of Science, PubMed, Embase, and Scopus up to September 2022 to identify eligible studies. A random-effects model was used to estimate the pooled prevalence. Cochran Q test and Higgins I2 were used to assess evidence of heterogeneity. RESULTS: In total, 39 studies were included in the systematic review. The meta-analysis included 35 studies consisting of a total of 954 patients, with an average age of 67.1 years. The pooled prevalence of acute tubular injury (ATI)-related changes was the predominant finding (85% [95% confidence interval, 71%-95%]), followed by arteriosclerosis (80%), vascular congestion (66%), and glomerulosclerosis (40%). Endotheliitis (7%), fibrin microthrombi (12%), focal segmental glomerulosclerosis (1%), and calcium crystal deposits (1%) were seen in a smaller number of autopsies. The overall average rate of virus detection was 47.79% in the pooled data of 21 studies (272 samples). CONCLUSIONS: The main finding-ATI-correlated to clinical COVID-19-associated acute kidney injury. The presence of SARS-CoV-2 in kidney samples in addition to vascular lesions in kidneys can be linked to direct kidney invasion by the virus.

The relationship between CT value and clinical outcomes in renal patients with COVID-19.

PURPOSE: Concomitant kidney diseases raise the mortality rate due to the SARS-CoV-2 virus as an independent factor. Although a qualitative PCR test's result is sufficient for diagnosis, Cycle threshold value may present relevant information to the physicians in providing faster treatment in patients with chronic conditions, including kidney diseases, to prevent morbidity and subsequent mortality. Thus, the present study was conducted to determine the relationship between the Cycle threshold value and clinical outcomes in renal patients with the coronavirus 2019. METHODS: This retrospective study was conducted on renal patients with the coronavirus 2019 infection admitted to Labbafinejad Hospital in Tehran, the capital of Iran, within a period of one year, from late February 2020 to February 2021. Data were collected per the prepared checklist. Cycle threshold values were measured by performing PCR on nasopharynx and oropharynx swab samples of patients. RESULTS: According to the adjusted analysis, having high viral load increased the odds of in-hospital mortality (aOR = 11.65, 95% CI 3.93-34.54), ICU admission (aOR = 5.49, 95% CI 2.16-13.97), and invasive ventilation (aOR = 7.18, 95% CI 2.61-19.74). Having high viral load also increased the odds of O2 therapy (aOR = 3.08, 95% CI 0.79-12.01), although the difference was not statistically significant (P = 0.105). CONCLUSION: Cycle threshold value was a significant predictor of mortality in renal patients. Nevertheless, further studies are required on how to render optimal use of the Cycle threshold value, given that the quality of the test sample and the different groups of patients under study affect the effectiveness of this marker in predicting disease severity.

Antibody-mediated Rejection of Kidney Allografts Following COVID-19: A Report of Two Cases.

Increased risk of graft rejection could be the consequence of COVID-19 in kidney transplant recipients (KTRs). We report two cases of kidney transplant (KT) with stable graft function who experienced antibody-mediated rejection (ABMR) following recovery from COVID-19. It seems that reduced immunosuppression during the acute illness, is the main explanation for post-COVID-19 ABMR. However, the inflammatory state associated with COVID-19, as well as direct cytopathic effects of severe acute respiratory syndrome coronavirus-2 (SARS-CoV-2) can predispose the kidney allograft to rejection. There is no definite guideline for the modification of immunosuppressives during COVID-19 in kidney transplant recipients. However, re-institution of full-dose immunosuppressives soon after recovery from COVID-19 and frequent outpatient follow-up visits are recommended.  DOI: 10.52547/ijkd.7176.

Renal mucormycosis following transurethral resection of prostate in the time of COVID-19: Unique imaging features resembling emphysematous pyelonephritis.

We report a case of isolated renal mucormycosis 2 weeks following transurethral resection of prostate. The patient also mentioned history of admission for COVID-19, two months earlier. Symptoms progressed and patient underwent urgent nephrectomy. CT scan resembled imaging features of emphysematous pyelonephritis and therefore, patient did not receive timely treatment with amphotericin B in addition to nephrectomy and succumbed to the disease.