Lymphoproliferative disorders after renal transplantation along 2 decades: a large longitudinal study of 21.546 recipients.

INTRODUCTION: Post transplant lymphoproliferative disorders (PTLD) are heterogeneous lymphoid proliferations in recipients of solid organs which seem to be related to Epstein Barr Virus (EBV). The use of antilymphocyte antibodies, EBV seronegativity in the recipient,acute rejection and CMV infection have been identified as classical risk factors. MATERIAL Y METHODS: We have studied in a retrospective observational study, the incidence of PTLD in a period of 22 years, its relationship with EBV, presence of classical risk factors and outcome in 21546 simple adult renal transplant recipients from cadaveric and living donors, transplanted in 21 hospitals from 1990 to 2009. RESULTS: A total of 275 recipients developed PTLD (1,2%),195 males (70,9%), 80 females (29,1%) aged 59.2 (p25 44.7 p75 68)years. Two hundred forty-five (89.0%) were 1st transplant recipients and 269 (97,8%) from cadaveric donors. EBV in the tissue was reported in 94 out of the 155 studied recipients (60.6%) and 86.0% of the proliferations were due to B lymphocytes. PTLD median appearance after transplant were 42.months (p25, 75, 12, 77, 5). One hundred eighty-eight recipients out of 275 patients (68.3%) had any classical risk factor and the use of antilymphocyte antibodies was the most frequent. During the follow-up, 172 patients died (62,5%) and 103 (37,5%) had a complete remission. The main cause of death was PTLD progression (n = 91, 52,9%), followed by sepsis (n = 24, 13,9%). The follow-up period post-transplant of the recipients was between 3 and 22 years. The incidence was 0,14% during the first year post-trasplant and 0.98% the cumulative incidence at 10 years. Patient survival after diagnosis was 51%, 44% and 39% after 1, 2 and 5 years, respectively. Finally, overall graft survival was 48%, 39% and 33% at the same periods. CONCLUSION: PTLD has a low incidence in renal transplant recipients. Most of the proliferations are due to B lymphocytes and seem to have a close relationship with EBV. PTLD can develop in the absence of classical risk factors. The prognosis is poor, mainly due to PTLD progression, but the survivors can even maintain their grafts.

Impact of coronavirus infection on anxiety and quality of life in individuals with a kidney transplant / Impacto de la infección por coronavirus en la ansiedad y en la calidad de vida de las personas con un trasplante renal

ABSTRACT Background: The consequences of SARSCoV- 2 infection on the mental health of kidney transplant recipients have not yet been investigated. Objectives: This study compares anxiety and quality of life in individuals with a kidney transplant who did or did not test positive for coronavirus. Design: Retrospective study of two prospective cohorts. Participants: Kidney transplant recipients under follow-up in a Spanish tertiary teaching hospital who tested positive for coronavirus (cases); and consecutive kidney recipients who had not suffered the infection (not-cases). Methods: Mortality and case fatality data were compared between the two cohorts for the two pandemic waves. For the second wave (July 1 to December 5, 2020), the data compared between cases (n=22) and not-cases (n=36) were state and trait anxiety (STAI), kidney transplant-related quality of life (KTQ), and mortality as the main outcome variables. Results: 601 transplanted persons of mean age 61.7 years (SD 12.8), 61.9% men. 12.1% (n=73) tested SARS-CoV-2-positive over the first two pandemic waves with a mortality of 2.9% and case fatality of 24.7%. Over the second wave, the mean quality of life score was 4.1 (SD 0.9) and the overall anxiety score was 49 (SD 24.3) for the two cohorts, which did not vary in terms of the impacts of these measures on the descriptive variables examined. Conclusions: Quality of life is invariably affected, and levels of anxiety are high regardless of whether or not they have had a SARS-CoV-2 infection. Over the period examined, mortality was low while coronavirus case fatality was high.

RESUMEN Introducción: Las personas con un trasplante renal forman una población vulnerable para la infección por SARS-CoV-2, lo que las puede llevar a sufrir consecuencias psicológicas que aún no han sido estudiadas. Objetivos: Comparar la incidencia de ansiedad y el nivel de calidad de vida, en personas con un trasplante renal, que se han contagiado de SARS-CoV-2 frente a los que no se han contagiado; así como describir la incidencia de contagios y la mortalidad en la población a estudio. Material y Métodos: Estudio retrospectivo de cohortes prospectivas. Durante la segunda ola de la pandemia (del 1 de julio al 5 de diciembre de 2020) se compararon los datos de la cohorte de casos (n=22) y la cohorte de no casos (n=36) en cuanto a ansiedad estado y ansiedad rasgo (medidas con el STAI), la calidad de vida (medida mediante el KTQ) y la mortalidad, como variables de interés principales. Resultados: La población a estudio fue de 601 personas trasplantadas, con una edad media de 61.7 años (DE: 12.8), 61.9% (372) fueron hombres. Se infectaron de SARS-CoV-2 el 12.1% (73) y fallecieron 6.2% (37), siendo el 52.9% (18) por SARSCoV- 2. Esto supone una tasa de mortalidad del 2.9% y una tasa de letalidad del 24.7%. Durante la segunda ola se infectaron un 6.2% (37). La calidad de vida media fue de 4.1 (DE: 0.9). En los infectados la media fue 4.2 (DE: 0.8), y en los no infectados 4 (DE: 1). Mientras que la media de ansiedad fue de 49 (DE:24.3); siendo 54.6 (DE: 25.7) en los infectados y 45.4 (DE: 23.1) en no infectados. No se encontraron diferencias estadísticamente significativas. Conclusiones: Las personas con un trasplante renal tienen afectada su calidad de vida y presentan altos niveles de ansiedad, independientemente de si han pasado o no la infección por SARS-CoV-2.La tasa de mortalidad durante el periodo analizado fue baja, mientras que la letalidad fue alta y ambas disminuyeron de la primera a la segunda ola de la infección.