COVID-19 in Pediatric Cancer Patients and Hematopoietic Stem Cell Transplant Recipients in a Tertiary Care Hospital in Argentina.

The outcome of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) infection in cancer pediatric patients was initially uncertain. The objective of this study was to describe the characteristics and outcome of cancer patients and hematopoietic stem cell transplant recipients from 0 to 19 years with detectable SARS-CoV-2 from April 23, 2020, to April 30, 2022, treated in a tertiary-level hospital in Argentina. A total of 348 cases were registered in 339 patients. The median age was 89.5 (3 to 224) months. The sex was predominantly male: 193 (55.5%). The most common malignant disease was leukemia (42.8%). One hundred four cases (29.9%) had comorbidities. Of the 346 cases with an available blood count, 17.6% had a lymphocyte count <300/mm 3 . Fever was the most common symptom. In most cases (93.1%) presented asymptomatic or mild disease. Twenty-one cases (6%) presented severe or critical status. Eleven of 24 admissions to the intensive care unit were due to COVID-19 (coronavirus disease 2019). Eight patients (2.3%) died. Two deaths were attributable to SARS-CoV-2 (0.6%). Being older, having fever, lymphopenia at diagnosis, and having received hematopoietic stem cell transplant were associated with a more severe disease. Around 90% of the children continued their cancer treatment without any change.

Comparison of SARS-CoV-2 viral load in asymptomatic and symptomatic children attended in a referral public pediatric hospital in Argentina / Comparación de la carga viral de SARS-CoV-2 en niños asintomáticos y sintomáticos atendidos en un hospital pediátrico público de referencia en Argentina

Abstract At present, different reports have shown that children reach similar SARS-CoV-2 viral load (VL) levels compared to adults; however, the impact of VL on children remains ambiguous when asymptomatic versus symptomatic cases are compared. Thus, the aim of this study was to assess VL at the time of diagnosis in asymptomatic and symptomatic SARS-CoV-2 infected children. VL analysis was retrospectively carried out from nasopharyngeal swabs on 82 SARS-CoV-2 infected children, from March to October 2020. Of the 82 children, 31 were asymptomatic. Symptomatic patients had significantly higher VL values compared to asymptomatic ones (median = 7.41 vs4.35 log10 copies/ml, respectively). Notwithstanding, 8 out of 31 asymptomatic children had high VL levels, overlapping levels observed above the first quartile in the symptomatic group. Analysis of different age groups revealed that median VL values were higher in the symptomatic groups, although there was only a significant difference in children younger than 5 years of age. On the other hand, there was no significant difference between the VL values from the 82 SARS-CoV-2 infected children according to age, sex, underlying disease, symptoms or severity of COVID-19 related disease. This study emphasizes the importance of VL analysis in SARS-CoV-2 infected children, who could contribute to viral spread in the community. This concern could be extended to healthcare workers, who are in contact with children.

Resumen Diferentes informes han demostrado que los ninos alcanzan niveles de carga viral (CV) de SARS-CoV-2 similares a los de los adultos, pero el impacto de la CV en los niños continua siendo incierto cuando se compara entre aquellos que son asintomáticos y sintomáticos. El objetivo de este estudio fue evaluar la CV al momento del diagnóstico en ninos asintomáticos y sintomáticos infectados por SARS-CoV-2. El análisis de CV se realizó retrospectivamente a partir de muestras de hisopados nasofaríngeos de 82 niños infectados por SARS-CoV-2 entre marzo y octubre de 2020. De ellos, 31 eran asintomáticos. Encontramos que el grupo sintomático tenía valores de CV significativamente más altos en comparación con el grupo asintomático (mediana = 7,41 vs. 4,35 log10 copias/ml, respectivamente). No obstante, 8 de los 31 ninos asintomáticos presentaron valores de CV elevados, equivalentes a los observados por encima del primer cuartil del grupo sintomático. El análisis por grupos de edad reveló que la mediana de CV fue más alta en los niños sintomáticos, aunque esta diferencia fue significativa solamente en los menores de 5 anos. A su vez, los valores de CV obtenidos a partir de los 82 niños infectados por SARS-CoV-2 no mostraron diferencias significativas según el grupo etario, el sexo, la enfermedad de base, los síntomas y la gravedad de la COVID-19. Este estudio enfatiza la necesidad del análisis de la CV en ninos infectados por SARS-CoV-2, quienes podrían contribuir a la propagación del virus en la comunidad. Esta preocupación podría extenderse a los trabajadores de la salud que están en contacto con los ninños.

COVID-19 in immunocompromised children: comparison of SARS-CoV-2 viral load dynamics between the first and third waves.

SARS-CoV-2 dynamics across different COVID-19 waves has been unclear in immunocompromised children. We aimed to compare the dynamics of SARS-CoV-2 RNA viral load (VL) during the first and third waves of COVID-19 in immunocompromised children. A retrospective and longitudinal cohort study was conducted in a pediatric referral hospital of Argentina. The study included 28 admitted immunocompromised children with laboratory confirmed SARS-CoV-2 infection. Thirteen acquired the infection during COVID-19 first wave (May to August 2020, group 1 (G1)) and fifteen in the third wave (January to March 2022, group 2 (G2)). RNA viral load measure and its dynamic reconstruction were performed in nasopharyngeal swabs by validated quantitative, real time RT-PCR, and linear mixed-effects model, respectively. Of the 28 children included, 54% were girls, most of them had hemato-oncological pathology (57%), and the median age was 8 years (interquartile range (IQR): 3-13). The dynamic of VL was similar in both groups (P = 0.148), starting from a level of 5.34 log10 copies/mL (95% confidence interval (CI): 4.47-6.21) in G1 and 5.79 log10 copies/mL (95% CI: 4.93-6.65) in G2. Then, VL decayed with a rate of 0.059 (95% CI: 0.038-0.080) and 0.088 (95% CI: 0.058-0.118) log10 copies/mL per day since diagnosis and fell below the limit of quantification at days 51 and 39 after diagnosis in G1 and G2, respectively. Our results evidenced a longer viral RNA persistence in immunocompromised pediatric patients and no difference in VL dynamic between COVID-19 first wave-attributed to ancestral infections-and third wave-attributed to Omicron infections.

Comparison of SARS-CoV-2 viral load in asymptomatic and symptomatic children attended in a referral public pediatric hospital in Argentina.

At present, different reports have shown that children reach similar SARS-CoV-2 viral load (VL) levels compared to adults; however, the impact of VL on children remains ambiguous when asymptomatic versus symptomatic cases are compared. Thus, the aim of this study was to assess VL at the time of diagnosis in asymptomatic and symptomatic SARS-CoV-2 infected children. VL analysis was retrospectively carried out from nasopharyngeal swabs on 82 SARS-CoV-2 infected children, from March to October 2020. Of the 82 children, 31 were asymptomatic. Symptomatic patients had significantly higher VL values compared to asymptomatic ones (median=7.41 vs 4.35log10 copies/ml, respectively). Notwithstanding, 8 out of 31 asymptomatic children had high VL levels, overlapping levels observed above the first quartile in the symptomatic group. Analysis of different age groups revealed that median VL values were higher in the symptomatic groups, although there was only a significant difference in children younger than 5 years of age. On the other hand, there was no significant difference between the VL values from the 82 SARS-CoV-2 infected children according to age, sex, underlying disease, symptoms or severity of COVID-19 related disease. This study emphasizes the importance of VL analysis in SARS-CoV-2 infected children, who could contribute to viral spread in the community. This concern could be extended to healthcare workers, who are in contact with children.

Características epidemiológicas en pacientes pediátricos con COVID-19 durante la primera ola pandémica / Experience in pediatric patients with COVID-19 during the first pandemic wave

Resumen La infección por SARS-CoV-2 se ha extendido en todo el mundo. La mayoría de las publicaciones describen un comportamiento diferente entre población adulta y pediátrica, esta última asociada a menor gravedad y morbimortalidad. El objetivo del trabajo fue analizar el proceso de atención, las característi cas clínicas epidemiológicas, la evolución y la utilización de recursos en pacientes pediátricos asistidos durante la primera ola pandémica a principio del 2020. Se realizó un estudio observacional, retrospectivo, descriptivo y analítico de pacientes pediátricos con infección por SARS-CoV-2, desde el 1 de abril al 31 de agosto del 2020, atendidos en un centro de alta complejidad. Se incluyeron 333 pacientes, 175 (53%) residentes del área Metropolitana de Buenos Aires (AMBA). La mediana de edad fue de 5.5 años (RIC 1.1-10.9) y 177 (53%) eran mujeres. Requirieron internación 209 (63%) y 152 (46%) tenían enfermedad de base. El 89% (n 295) cursó una enfermedad leve/asintomática y el síntoma predominante fue fiebre (n 169, 65%). En el análisis univariado, la enfermedad neurológica (OR 4.5, IC95% 1.9-11, p 0.002), pulmonar crónica (OR 3.9, IC95%1.5-10.3, p 0.002) y genética (OR 11, IC95%3.4-34.4, p< 0.001), así como los síntomas neurológicos (OR 2.8, IC95%1.1-6.6, p 0.035) y respiratorios (OR 20.2, IC95%8.5-48.2, p 0.001) se asociaron a mayor gravedad. Se deberá continuar con la vigilancia activa de aquellos con enfermedad compleja a fin de determinar los efectos de la pandemia en esta población.

Abstract Coronavirus 2 infection has spread rapidly throughout the world. Most of the current publications describe differ ent behavior between an adult and pediatric population, this last one is associated with less clinical severity. The purpose of this study was to analyze the process of care, the epidemiological and clinical features, the evolution and the use of resources in pediatric patients with SARS-Cov-2 infection, treated during the first pandemic wave, at the beginning of 2020. An observational and retrospective study was carried out in the pediatric population with SARS-CoV-2 infection, treated in a highly complex pediatric hospital from April 1 to August 31, 2020. A total of 333 patients were included, 175 (53%) residents of the Metropolitan area of Buenos Aires (AMBA). The median age was 5.47 years (IQR 1.1-10.9) and 177 (53%) were women. A total of 209 (63%) patients required hospi talization and 152 (46%) had an underlying disease. Most of the patients (n 295, 89%) had mild/asymptomatic disease and the main symptom was fever (N169, 65%). In the univariate analysis, neurological disease (OR 4.5, IC95% 1.9-11, p 0.002), chronic respiratory disease (OR 3.9, IC95%1.5-10.3, p 0.002) and genetics (OR 11, IC95%3.4-34.4, p < 0.001), as well as neurological symptoms (OR 2.8, IC95%1.1-6.6, p 0.035) and respiratory (OR 20.2, IC95%8.5-48.2, p 0.001) were associated with more severe disease. Active surveillance of pediatric patients with underlying diseases should continue to define the pandemic's impact on this specific population.

[Experience in pediatric patients with COVID-19 during the first pandemic wave]. / Características epidemiológicas en pacientes pediátricos con COVID-19 durante la primera ola pandémica.

Coronavirus 2 infection has spread rapidly throughout the world. Most of the current publications describe different behavior between an adult and pediatric population, this last one is associated with less clinical severity. The purpose of this study was to analyze the process of care, the epidemiological and clinical features, the evolution and the use of resources in pediatric patients with SARS-Cov-2 infection, treated during the first pandemic wave, at the beginning of 2020. An observational and retrospective study was carried out in the pediatric population with SARS-CoV-2 infection, treated in a highly complex pediatric hospital from April 1 to August 31, 2020. A total of 333 patients were included, 175 (53%) residents of the Metropolitan area of Buenos Aires (AMBA). The median age was 5.47 years (IQR 1.1-10.9) and 177 (53%) were women. A total of 209 (63%) patients required hospitalization and 152 (46%) had an underlying disease. Most of the patients (n 295, 89%) had mild/asymptomatic disease and the main symptom was fever (N169, 65%). In the univariate analysis, neurological disease (OR 4.5, IC95% 1.9-11, p 0.002), chronic respiratory disease (OR 3.9, IC95% 1.5-10.3, p 0.002) and genetics (OR 11, IC95%3.4-34.4, p < 0.001), as well as neurological symptoms (OR 2.8, IC95%1.1-6.6, p 0.035) and respiratory (OR 20.2, IC95%8.5-48.2, p 0.001) were associated with more severe disease. Active surveillance of pediatric patients with underlying diseases should continue to define the pandemic's impact on this specific population.

La infección por SARS-CoV-2 se ha extendido en todo el mundo. La mayoría de las publicaciones describen un comportamiento diferente entre población adulta y pediátrica, esta última asociada a menor gravedad y morbimortalidad. El objetivo del trabajo fue analizar el proceso de atención, las características clínicas epidemiológicas, la evolución y la utilización de recursos en pacientes pediátricos asistidos durante la primera ola pandémica a principio del 2020. Se realizó un estudio observacional, retrospectivo, descriptivo y analítico de pacientes pediátricos con infección por SARS-CoV-2, desde el 1 de abril al 31 de agosto del 2020, atendidos en un centro de alta complejidad. Se incluyeron 333 pacientes, 175 (53%) residentes del área Metropolitana de Buenos Aires (AMBA). La mediana de edad fue de 5.5 años (RIC 1.1-10.9) y 177 (53%) eran mujeres. Requirieron internación 209 (63%) y 152 (46%) tenían enfermedad de base. El 89% (n 295) cursó una enfermedad leve/asintomática y el síntoma predominante fue fiebre (n 169, 65%). En el análisis univariado, la enfermedad neurológica (OR 4.5, IC95% 1.9-11, p 0.002), pulmonar crónica (OR 3.9, IC95%1.5-10.3, p 0.002) y genética (OR 11, IC95%3.4-34.4, p< 0.001), así como los síntomas neurológicos (OR 2.8, IC95%1.1-6.6, p 0.035) y respiratorios (OR 20.2, IC95%8.5-48.2, p 0.001) se asociaron a mayor gravedad. Se deberá continuar con la vigilancia activa de aquellos con enfermedad compleja a fin de determinar los efectos de la pandemia en esta población.

Case Report: Hyperinflammatory Status in an Immunocompromised Child With a Highly Sustained Viral Load of SARS-CoV-2.

Coronavirus disease 2019 (COVID-19) is spreading throughout the world. Limited data are available for the dynamics of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) viral load (VL) in immunocompromised pediatric patients. Here, we report the clinical characteristics and the dynamics of SARS-CoV-2 VL of a pediatric patient with acute myeloid leukemia who developed a hyperinflammatory status mimicked MIS-C. The clinical course was characterized by the late onset of fever, GI symptoms, rash, and respiratory distress, including oxygen requirement with sustained VL of SARS-CoV-2 around 7 log10 RNA copies/mL for 6 weeks. It is important to note that the hyperinflammatory status developed early at the third week of hospitalization-in a context of high VL and immunocompromised status. All these characteristics make this clinical case unique. On the other hand, while many reports have characterized the dynamics of SARS-CoV-2 VL in adults and immunocompetent hosts, it remains unreported in pediatrics-even less in immunosuppressed children.

Pediatric Inflammatory Multisystem Syndrome Associated With SARS-CoV-2: A Retrospective Cohort Study From Argentina.

OBJECTIVE: To evaluate the differential characteristics of SARS-COV-2 associated inflammatory multisystem syndrome (MIS-C) in children. METHODS: A retrospective cohort study was conducted.  The definition of MIS- C was based on WHO criteria. Temporally related COVID-19 patients were included as controls. RESULTS: 25 patients with MIS-C and 75 controls were included. Multivariate multiple logistic regression model of variables that showed to be significant in univariate analysis revealed that age ≥2 years (OR 24.7; 95% CI 1.03 -592.4; P=0.048), lymphopenia (OR 9.03, 95%CI 2.05-39.7; P=0.004), and platelet count <150x109/L (OR 11.7; 95% CI 1.88-75.22; P=0.009) were significantly associated with MIS-C. Presence of underlying disease seemed to reduce the risk of MIS-C (OR 0.06; 95% CI 0.01-0.3). CONCLUSIONS: MIS-C was more common in patients older than 2 years and in those with lymphopenia or thrombocytopenia. Underlying disease appears to reduce the risk of MIS-C.

Childhood Neuroblastoma: Incidence and Survival in Argentina. Report from the National Pediatric Cancer Registry, ROHA Network 2000-2012.

BACKGROUND: There are reports indicating a low incidence of neuroblastoma (NB) in some developing countries but no conclusive data are available from population-based studies at a national level. PURPOSE: To describe the incidence and survival of 971 patients with NB in Argentina with data from the National Pediatric Cancer Registry (ROHA), and the impact of age, gender, stage, regional, and socioeconomic indicators on outcome. METHODS: All cases of NB reported to ROHA (2000-2012) were the subject of the analysis. Annual-standardized incidence rate (ASR) was calculated using the National Vital Statistics and survival was estimated. The extended human development index (EHDI) was used as the socioeconomic indicator. RESULTS: ASR was 8.3/1,000,000 children (0-14 years) and remained stable along this period. Regional variation in ASR ranged from 3.4 in the Northwest to 9.8 in the Central region, being most marked in the first year of life. Five-year survival rate (SR) was 47%, with no sex difference. For patients older than 18 months, it was 36%, for stage IV 23%, for those born in the Northeast region 38%, and for those with an amplified MYCN 15%. Residents in provinces with a higher EHDI had a better 5-year survival (57% vs. 41% for lower EHDI) and higher ASR (12.3 vs. 5.6 for lower EHDI). Stage and MYCN status showed an independent inferior prognosis. CONCLUSIONS: ASR of NB in Argentina is lower than in developed countries, with considerable regional variation. SRs are also lower than in developed countries.

Tumores cerebrales infratentoriales y supratentoriales: comparación de perfil cognitivo y su impacto en la calidad de vida en niños en edad escolar / Infra- and supratentorial brain tumors: comparison of the cognitive profile and its impact on quality of life in school-age children

INTRODUCCION: Los avances científicos han logrado aumentar la cantidad de pacientes pediátricos que sobreviven a enfermedades oncológicas. En general, para los niños que padecen tumores del sistema nervioso central, esta sobrevida viene acompañada de efectos adversos secundarios, tales como déficits cognitivos.OBJETIVO: Evaluar las funciones cognitivas y la calidad de vida en niños con tumores cerebrales infratentoriales y supratentoriales.METODOS: Se realizó un estudio analítico observacional. La muestra total estuvo conformada por 51 sujetos. Se utilizaron los siguientes instrumentos de medición: Escala de Inteligencia de Wechsler para niños IV, Sistema de Evaluación Cognitiva; Test de Memoria y Aprendizaje; Escala Graffar y Peds Quality of Life 4.0.RESULTADOS: La comparación de los resultados no arrojó diferencias significativas entre localizaciones tumorales infratentoriales y supratentoriales. La totalidad de los pacientes evaluados en un período de post-tratamiento oncológico presentó un descenso similar y significativo en todas las áreas estudiadas, en relación con lo esperado para la población general. Las funciones cognitivas que evidenciaron mayor compromiso fueron la velocidad de procesamiento y la capacidad atencional (principalmente en tareas de planificación). Los resultados observados pusieron de manifiesto estos déficits, así como un alto compromiso de la calidad de vida escolar.CONCLUSIONES: El trabajo se presenta como un estudio preliminar. A partir de él se podría definir la tendencia general del estado neurocognitivo, analizar su impacto en la calidad de vida de la población estudiada y plantear interrogantes dirigidos a futuras investigaciones.

INTRODUCTION: Due to scientific advances, there is a growing number of pediatric patients surviving cancer. In general, for children who suffer from central nervous system tumors, this survival is associated with secondary adverse effects, such as cognitive deficits.OBJECTIVE: To assess cognitive functions and quality of life in children with infratentorial and supratentorial brain tumors.METHODS: An analytical observational study was conducted. The total sample consisted of 51 subjects. Following measurement instruments were used: Wechsler Intelligence Scale for Children, Fourth Edition (WISC IV), Cognitive Assessment System (CAS), Test of Memory and Learning (TOMAL), Graffar Scale and Peds Quality of Life 4.0.RESULTS: The comparisons of the results did not show significant differences between infratentorial and supratentorial tumor location. All patients that were evaluated in the post-cancer treatment period revealed a similar significant impairment in all the areas studied, when compared with the level expected in the general population. The most severely affected cognitive functions were processing speed and attention span, mainly on planning tasks. The findings also showed that quality of life at school is severely affected in these children.CONCLUSIONS: This is a preliminary study whose results may define a general trend of neurocognitive status, analyzing its impact on the quality of life of the study population and posing useful questions for the future research.

Tumores cerebrales infratentoriales y supratentoriales: comparación de perfil cognitivo y su impacto en la calidad de vida en niños en edad escolar / Infra- and supratentorial brain tumors: comparison of the cognitive profile and its impact on quality of life in school-age children

INTRODUCCION: Los avances científicos han logrado aumentar la cantidad de pacientes pediátricos que sobreviven a enfermedades oncológicas. En general, para los niños que padecen tumores del sistema nervioso central, esta sobrevida viene acompañada de efectos adversos secundarios, tales como déficits cognitivos.OBJETIVO: Evaluar las funciones cognitivas y la calidad de vida en niños con tumores cerebrales infratentoriales y supratentoriales.METODOS: Se realizó un estudio analítico observacional. La muestra total estuvo conformada por 51 sujetos. Se utilizaron los siguientes instrumentos de medición: Escala de Inteligencia de Wechsler para niños IV, Sistema de Evaluación Cognitiva; Test de Memoria y Aprendizaje; Escala Graffar y Peds Quality of Life 4.0.RESULTADOS: La comparación de los resultados no arrojó diferencias significativas entre localizaciones tumorales infratentoriales y supratentoriales. La totalidad de los pacientes evaluados en un período de post-tratamiento oncológico presentó un descenso similar y significativo en todas las áreas estudiadas, en relación con lo esperado para la población general. Las funciones cognitivas que evidenciaron mayor compromiso fueron la velocidad de procesamiento y la capacidad atencional (principalmente en tareas de planificación). Los resultados observados pusieron de manifiesto estos déficits, así como un alto compromiso de la calidad de vida escolar.CONCLUSIONES: El trabajo se presenta como un estudio preliminar. A partir de él se podría definir la tendencia general del estado neurocognitivo, analizar su impacto en la calidad de vida de la población estudiada y plantear interrogantes dirigidos a futuras investigaciones.

INTRODUCTION: Due to scientific advances, there is a growing number of pediatric patients surviving cancer. In general, for children who suffer from central nervous system tumors, this survival is associated with secondary adverse effects, such as cognitive deficits.OBJECTIVE: To assess cognitive functions and quality of life in children with infratentorial and supratentorial brain tumors.METHODS: An analytical observational study was conducted. The total sample consisted of 51 subjects. Following measurement instruments were used: Wechsler Intelligence Scale for Children, Fourth Edition (WISC IV), Cognitive Assessment System (CAS), Test of Memory and Learning (TOMAL), Graffar Scale and Peds Quality of Life 4.0.RESULTS: The comparisons of the results did not show significant differences between infratentorial and supratentorial tumor location. All patients that were evaluated in the post-cancer treatment period revealed a similar significant impairment in all the areas studied, when compared with the level expected in the general population. The most severely affected cognitive functions were processing speed and attention span, mainly on planning tasks. The findings also showed that quality of life at school is severely affected in these children.CONCLUSIONS: This is a preliminary study whose results may define a general trend of neurocognitive status, analyzing its impact on the quality of life of the study population and posing useful questions for the future research.

Accidentes por extravasación de citostáticos / Accidental cytotoxic extravasation

La toxicidad local de los citostáticos oscila entre el 2 y el 6 por ciento de todos sus efectos adversos. Si bien su frecuencia no es alta las lesiones que pueden originarse revisten sin embargo importancia por sus consecuencias sobre la calidad de vida del paciente y la continuidad del tratamiento. La incidencia de las lesiones por extravasación de quimioterápicos oscila según los diferentes centros entre 0,5 y 1 por ciento de todos los enfermos tratados. Los principales factores de riesgo son el suministro repetido de drogas y el deterioro progresivo de las venas

Accidentes por extravasación de citostáticos / Accidental cytotoxic extravasation

La toxicidad local de los citostáticos oscila entre el 2 y el 6 por ciento de todos sus efectos adversos. Si bien su frecuencia no es alta las lesiones que pueden originarse revisten sin embargo importancia por sus consecuencias sobre la calidad de vida del paciente y la continuidad del tratamiento. La incidencia de las lesiones por extravasación de quimioterápicos oscila según los diferentes centros entre 0,5 y 1 por ciento de todos los enfermos tratados. Los principales factores de riesgo son el suministro repetido de drogas y el deterioro progresivo de las venas