Difference between SARS-CoV-2, seasonal coronavirus, influenza, and respiratory syncytial virus infection in solid organ transplant recipients.

BACKGROUND: Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) pandemic has been raging since the end of 2019 and has shown worse outcomes in solid organ transplant (SOT) recipients. The clinical differences as well as outcomes between respiratory viruses have not been well defined in this population. METHODS: This is a retrospective cohort study of adult SOT recipients with nasopharyngeal swab or bronchoalveolar lavage PCR positive for either SARS-CoV-2, seasonal coronavirus, respiratory syncytial virus (RSV) or influenza virus from January 2017 to October 2020. The follow up period was 3 months. Clinical characteristics and outcomes were evaluated. RESULTS: A total of 377 recipients including 157 SARS-CoV-2, 70 seasonal coronavirus, 50 RSV and 100 influenza infections were identified. The most common transplanted organ was kidney 224/377 (59.4%). Lower respiratory tract infection (LRTI) was found in 210/377 (55.7%) and the risk factors identified with multivariable analysis were SARS-CoV-2 infection, steroid use, and older age. Co- and secondary infections were seen in 77/377 (20.4%) recipients with bacterial pathogens as dominant. Hospital admission was seen in 266/377 (67.7%) recipients without significant statistical difference among viruses, however, ICU admission, mechanical ventilation and mortality were higher with SARS-CoV-2 infection. In the multivariable model, the risk factors for mortality were SARS-CoV-2 infection and older age. CONCLUSIONS: We found higher incidence of ICU admission, mechanical ventilation, and mortality among SARS-CoV-2 infected recipients. Older age was found to be the risk factor for lower respiratory tract infection and mortality for SARS-CoV-2, coronaviruses, RSV and influenza virus groups.

Rarely Described Renal Malignancies Associated With Venous Tumor Thrombus.

BACKGROUND/AIM: Collecting duct carcinoma, epithelioid angiosarcoma and neuroendocrine/carcinoid tumor are uncommon renal malignancies, and their association with tumor thrombus extending into the inferior vena cava is extremely rare. Owing to the rarity of the above-mentioned malignancies and short follow-up of the cases published in the literature, the prognosis and clinical behavior of these tumors remains unclear. Up to date, the culprit of treatment is surgical management with radical nephrectomy, lymph node dissection, thrombectomy and vascular reconstruction if necessary. PATIENTS AND METHODS: We herein describe in detail the first cases published of the above-mentioned renal malignancies associated with extensive inferior vena cava (IVC) thrombus, in which complex vascular reconstruction was performed. RESULTS: Three male patients were identified as having collecting duct carcinoma, epithelioid angiosarcoma and neuroendocrine/carcinoid tumor with IVC involvement. Tumor thrombus levels were II, I and IIIc respectively. Patient ages were 42, 60 and 47 years and tumor sizes were 9.2, 10.9 and 3.7 cm correspondingly. Patient 2 underwent cavectomy, IVC replacement using polytetrafluoroethylene (Gore-Tex®) vascular graft and IVC filter deployment inside the graft. None of the patients developed any pulmonary emboli postoperatively. At the last follow-up, IVC graft for patient 2 remained patent. CONCLUSION: Owing to the rarity of the aforementioned malignancies and short follow-up of cases published in the literature, the prognosis and clinical behavior of these tumors remains unclear. Up to date, the culprit of treatment is surgical management with radical nephrectomy, lymph node dissection, thrombectomy and vascular reconstruction if necessary. Polytetrafluoroethylene (Gore-Tex) vascular grafts are an excellent and safe option for complex vascular reconstructions in patients with evidence of IVC invasion.

Is the Omicron variant truly less virulent in solid organ transplant recipients?

Solid organ transplant (SOT) recipients are at high risk for severe disease with severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) infection. Emerging variants of concern have disproportionately affected this population. Data on severity and outcomes with the Omicron variant in SOT recipients are limited. Thus we conducted this single-center, retrospective cohort study of SOT recipients diagnosed with SARS-CoV-2 infection from December 18, 2021 to January 18, 2022, when prevalence of the Omicron variant was more than 80%-95% in the community. Univariate and multivariate logistic regression analysis was performed to identify risk factors for hospital admission. We identified 166 SOT patients: 112 (67.5%) kidney, 22 (13.3%) liver, 10 (6.0%) lung, seven (4.2%) heart, and 15 (9.0%) combined transplants. SARS-CoV-2 vaccine series was completed in 59 (35.5%) recipients. Ninety-nine (59.6%) and 13 (7.8%) recipients received casirivimab/imdevimab and sotrovimab, respectively. Fifty-three (32%) recipients required hospital admission, of which 19 (35.8%) required intensive care unit level of care. Median follow-up was 50 (interquartile range, 25-59) days, with mortality reported in six (3.6%) patients. Risk factors identified for hospital admission were African American race (p < .001, odds ratio [OR] 4.00, 95% confidence interval [CI] 1.84-8.70), history of coronary artery disease (p = .031, OR 3.50, 95% CI 1.12-10.87), and maintenance immunosuppression with corticosteroids (p = .048, OR 2.00, 95% CI 1.01-4.00). In conclusion, contrary to that in the general population, we found a higher hospital admission rate in SOT recipients with omicron variant infection. Further studies to investigate the efficacy of newer treatments are necessary, even as outcomes continue to improve.

When is it safe to perform abdominal transplantation in patients with prior SARS-CoV-2 infection: A case series.

BACKGROUND: The Coronavirus disease 2019(COVID-19) pandemic has negatively impacted worldwide organ transplantation. However, there is limited information on recipients transplanted after SARS-CoV-2 infection. A full understanding of this scenario is required, as transplantation is a life-saving procedure and COVID-19 remains an ongoing threat. METHODS: Abdominal organ transplant recipients diagnosed with COVID-19 prior to transplantation were identified by chart review and clinical data were collected. The primary outcome was the transplant outcome including graft loss, rejection and death, and reactivation of infection post-transplant. RESULTS: We identified 14 patients who received abdominal organ transplants after symptomatic PCR confirmed SARS-CoV-2 infection; four patients had a positive PCR at the time of admission for transplantation. The median time of follow-up was 79 (22-190) days. One recipient with negative PCR before transplant tested positive 9 days after transplant. One of 14 transplanted patients developed disseminated mold infection and died 86 days after transplant. During the follow-up, only one patient developed rejection; thirteen patients had favorable graft outcomes. CONCLUSIONS: We were able to perform abdominal transplantation for patients with COVID-19 before transplant, even with positive PCR at the time of transplant. Larger studies are needed to determine the time to safe transplant after SARS-CoV-2 infection.

Challenging Cases of Renal Cell Cancers With or Without Tumor Thrombus During the Covid-19 Pandemic.

BACKGROUND/AIM: Large or bilateral multiple renal cell carcinoma (RCC) without/with tumor thrombus (TT) in the renal vein (RV) or inferior vena cava (IVC) poses a challenge to the surgeon due to the potential for massive hemorrhage, tumor thromboemboli and dialysis, and the situation is more critical due to Covid-19 pandemic. We report our experience and measures in dealing with challenging cases of large or multiple RCCs without/with TT during the ongoing Covid-19 pandemic. PATIENTS AND METHODS: Between 4/2020-10/2020, five patients underwent RCC resection with/without TT. Patients 1 and 2 had RCCs/TT in RV; Patient 3 had RCC/TT supradiaphragmatic below right atrium; Patient-4 had a 26 cm RCC; Patient-5 had multiple RCCS as part of Birt-Hogg-Dube syndrome. RESULTS: Patients were preoperatively tested negative for Covid-19. Operation times were 105, 85, 255, 200 and 247 minutes for Patients 1-5. Estimated blood loss was: 100, 50, 3,900,100 and 50 ml, respectively. Patient 3 underwent RCC resection en bloc with IVC/TT. Patients 1 and 2 underwent resections of RCC/TT in RV. Patient 4 underwent a 26 cm RCC resection. Patient 5 underwent laparoscopic bilateral radical nephrectomies. No immediate postoperative complications were reported. CONCLUSION: We successfully managed 5 challenging cases of RCCs despite the recommendations imposed by hospitals due to Covid-19 pandemic, with favorable outcomes.

Deceased donor kidney transplant in a 70-year-old Jehovah's Witness patient: to transplant or not to transplant-a case report.

While Jehovah's Witness (JW) patients refuse transfusions of blood or blood products, they are willing to accept renal allograft transplantation. We describe here a case of what we believe is the oldest (a 70-year-old) JW candidate to undergo a deceased donor kidney transplant reported in the literature. Prior to transplantation, discussions ensued amongst the multidisciplinary transplant team, weighing the potential benefits vs. risks of performing a kidney transplant on this patient due to her refusal (due to religion) to accept any blood transfusions or blood products combined with her advanced age and having longstanding insulin-dependent, type 2 diabetes mellitus with extensive peripheral vascular disease. Preoperatively, we believed that the odds were in favor of performing the kidney transplant safely without the need for any blood product usage. However, her post-operative course was complicated by severe anemia, which developed by post-transplant day 4. The anemia incapacitated the patient's physical and psychological state, creating medical, social and financial burdens on the patient, family, medical team and hospital. Both family and patient grew concerned about her overall condition. Blood transfusion was offered in order to improve her weakness and shortness of breath that developed due to the severe anemia, but the patient (along with her family) refused such treatment. During the 17 days of hospitalization, it was a continuous struggle between the transplant team, patient, and family for her to continue with the recovery process; at times we had even considered that performing the transplant had been a mistake. While organ transplantation can be performed safely in Jehovah's Witnesses, there are multiple factors seen in this particular case that warrant analyzing: (I) the potential use of stricter transplant exclusionary criteria, given the recipient's advanced age and preexisting co-morbidities, which likely increased her risk of developing severe anemia post-operatively, and (II) the recipient's emotional/psychological post-operative state of high anxiety, which developed while she was experiencing the severe anemia; in hindsight, her anxiety level may have been reduced if we had offered daily post-operative psychological counseling sessions. While the patient's allograft is currently doing well, we probably did not have strict enough criteria for proper selection of a JW candidate for kidney transplantation.

Early experience with COVID-19 in kidney transplantation recipients: update and review

ABSTRACT Introduction: little is known on the risk factors, clinical presentation, therapeutic protocols, and outcomes of kidney transplantation recipients (KTRs) who become infected by SARS-CoV-2. Purpose: to provide an updated view regarding the early experience obtained from the management of KTRs with COVID-19. Materials and Methods: A narrative review was conducted using PubMed database to identify relevant articles written in English/Spanish, and published through May 15, 2020. Search terms included: "coronavirus", "severe acute respiratory syndrome coronavirus 2", "SARS-CoV-2", "COVID-19", "COVID", "renal transplantation", and "kidney transplantation". Case series were considered eligible, and case reports excluded. Thirty-four articles were included in the review. Results: KTRs should be considered immunocompromised hosts: potential risk for infection, non-negligible comorbidity, and exposure to long-term immunosuppression. Only single center small retrospective experiences are still available regarding KTRs with COVID-19. SARS-CoV-2 symptoms in KTRs are similar to that observed for the general population, being fever and cough the most frequently observed. Mild-to-moderate symptomatic KTRs can be managed in an outpatient setting, while patients exhibiting severe symptoms must be addmited to hospital. More rapid clinical progression, and higher complication and death rates have been observed for hospitalized KTRs, requiring hemodyalisis or ventilatory support. Lymphopenia, elevated serum markers (C-reactive protein, procalcitonin, IL-6, D-dimer), and chest-X-ray findings consistent with pneumonia are linked to worse prognosis. A number of antiviral therapies have been used. However, it is difficult to draw meaningful conclusions regarding their efficacy at this point. Baseline immunosupression regimen should be adjusted in a case-by-case manner. However, it poses a significant challenge.

Early experience with COVID-19 in kidney transplantation recipients: update and review.

INTRODUCTION: little is known on the risk factors, clinical presentation, therapeutic protocols, and outcomes of kidney transplantation recipients (KTRs) who become infected by SARS-CoV-2. PURPOSE: to provide an updated view regarding the early experience obtained from the management of KTRs with COVID-19. MATERIALS AND METHODS: A narrative review was conducted using PubMed database to identify relevant articles written in English/Spanish, and published through May 15, 2020. Search terms included: "coronavirus", "severe acute respiratory syndrome coronavirus 2", "SARS-CoV-2", "COVID-19", "COVID", "renal transplantation", and "kidney transplantation". Case series were considered eligible, and case reports excluded. Thirty-four articles were included in the review. RESULTS: KTRs should be considered immunocompromised hosts: potential risk for infection, non-negligible comorbidity, and exposure to long-term immunosuppression. Only single center small retrospective experiences are still available regarding KTRs with COVID-19. SARS-CoV-2 symptoms in KTRs are similar to that observed for the general population, being fever and cough the most frequently observed. Mild-to-moderate symptomatic KTRs can be managed in an outpatient setting, while patients exhibiting severe symptoms must be addmited to hospital. More rapid clinical progression, and higher complication and death rates have been observed for hospitalized KTRs, requiring hemodyalisis or ventilatory support. Lymphopenia, elevated serum markers (C-reactive protein, procalcitonin, IL-6, D-dimer), and chest-X-ray findings consistent with pneumonia are linked to worse prognosis. A number of antiviral therapies have been used. However, it is difficult to draw meaningful conclusions regarding their efficacy at this point. Baseline immunosupression regimen should be adjusted in a case-by-case manner. However, it poses a significant challenge.