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Objective: This study aimed to describe the clinical characteristics and the different phenotypes of children with multisystem inflammatory syndrome in children (MIS-C) temporally related to COVID-19 and to evaluate the risk conditions that favored a greater severity of the disease during a 12-month period at a pediatric reference hospital in Colombia. Methods: A 12-month retrospective observational study of children under the age of 18 years who met criteria for MIS-C. Results: A total of 28 children presented MIS-C criteria. The median age was 7 years. Other than fever (100%) (onset 4 days prior to admission), the most frequent clinical features were gastrointestinal (86%) and mucocutaneous (61%). Notably, 14 (50%) children had Kawasaki-like symptoms. The most frequent echocardiographic abnormalities were pericardial effusion (64%), valvular involvement (68%), ventricular dysfunction (39%), and coronary artery abnormalities (29%). In addition, 75% had lymphopenia. All had at least one abnormal coagulation test. Most received intravenous immunoglobulin (89%), glucocorticoids (82%), vasopressors (54%), and antibiotics (64%). Notably, 61% had a more severe form of the disease and were admitted to an intensive care unit (median 4 days, mean 6 days); the severity predictors were patients with the inflammatory/MIS-C phenotype (OR 26.5; 95%CI 1.40–503.7; p=0.029) and rash (OR 14.7; 95%CI 1.2–178.7; p=0.034). Two patients had macrophage activation syndrome. Conclusions: Coronary artery abnormalities, ventricular dysfunction, and intensive care unit admission were frequent, which needs to highlight the importance of early clinical suspicion. Resumo Objetivo: Descrever as características clínicas e os diferentes fenótipos de crianças com síndrome inflamatória multissistêmica na criança temporalmente relacionada com a COVID-19 (do inglês multisystem inflammatory syndrome in children — MIS-C) e avaliar as condições de risco que favorecem a maior gravidade da doença durante um período de 12 meses em um hospital pediátrico de referência na Colômbia. Métodos: Estudo retrospectivo de 12 meses de observação de crianças menores de 18 anos que cumprem os critérios para o MIS-C. Resultados: Vinte e oito crianças foram apresentadas com os critérios do MIS-C. A idade média era de sete anos, e 54% eram do sexo masculino. Para além da febre (100%) (com início quatro dias antes da admissão), as características clínicas mais frequentes eram gastrointestinais (86%) e mucocutâneas (61%). Quatorze crianças (50%) apresentavam sintomas semelhantes aos de Kawasaki. As anomalias ecocardiográficas mais frequentes foram derrame pericárdico (64%), envolvimento valvar (68%), disfunção ventricular (39%) e anomalias coronárias (29%). Tinham linfopenia 75% das crianças. Todas tinham algum teste de coagulação anormal. A maioria recebeu imunoglobulina intravenosa (89%), glucocorticoides (82%), vasopressores (54%) e antibióticos (64%). Tiveram envolvimento mais grave 61% dos pacientes, que precisaram ser internados em unidade de terapia intensiva (mediana de quatro dias, média de seis dias); os preditores de gravidade foram pacientes com fenótipo inflamatório/ MIS-C (odds ratio — OR 26,5; intervalo de confiança — IC95% 1,4–503,7; p=0,029) e erupção cutânea (OR 14,7; IC95% 1,2–178,7; p=0,034). Dois pacientes (7%) apresentavam síndrome de ativação macrofágica. Conclusões: Alteração da artéria coronária, disfunção ventricular e internação na unidade de terapia intensiva foram frequentes, o que nos alerta sobre a importância da suspeita clínica precoce.

Introduction: Purulent pericarditis is an inflammatory process in the pericardium caused by bacterial infection. If experienced during childhood and with untimely diagnosis, it has a high mortality rate. Case presentation: A 10-month-old infant was admitted to a high complexity pediatric hospital in the city of Bogotá D.C, Colombia, due to clinical symptoms including cough, respiratory distress and fever. A chest x-ray was taken showing cardiomegaly and multilobar pulmonary involvement. The echocardiogram showed global pericardial effusion managed with pericardiotomy, in which 50 mL of turbid fluid with whitish membranes was obtained. Cytochemical test revealed 2 600 mm3 leukocytes with 90% PMN and protein elevation. Purulent pericarditis was diagnosed based on imaging and laboratory findings. Treatment was initiated with ceftriaxone and clindamycin for four weeks, obtaining effective clinical and echocardiographic resolution. Discussion: The clinical presentation and imaging, paraclinical and electrocardiographic findings suggested purulent pericarditis as the first possibility. This diagnosis was confirmed considering the characteristics of the pericardial fluid, which was compatible with an exudate. Clinical resolution supported by antibiotic management corroborated the diagnosis, even though microbiological isolation was not obtained in cultures. Conclusion: Purulent pericarditis is a rare disease in pediatrics and has a high mortality rate. Making a timely diagnosis and administering early treatment are related to a better prognosis of this pathology. RESUMEN Introducción. La pericarditis purulenta es un proceso inflamatorio del pericardio producto de una infección bacteriana. De no lograrse un diagnóstico oportuno, se convierte en una patología con alta mortalidad en la infancia. Presentación del caso. Lactante de 10 meses de edad que ingresó a un hospital pediátrico de alta complejidad en Bogotá D.C., Colombia, por un cuadro clínico dado por tos, dificultad respiratoria y fiebre. Se tomó una radiografía de tórax donde se observó cardiomegalia y compromiso neumónico multilobar. El ecocardiograma mostró un derrame pericárdico global que requirió pericardiotomía, en la cual se obtuvo 50 mL de líquido turbio con membranas blanquecinas. En la prueba citoquímica se encontraron 2 600mm3 leucocitos, polimorfonucleares del 90% y elevación de proteínas. Con los hallazgos de imagenología y laboratorio se hizo el diagnóstico de pericarditis purulenta, por lo que se inició tratamiento con ceftriaxona y clindamicina por 4 semanas, obteniendo una resolución clínica y ecocardiográfica efectiva. Discusión. La presentación clínica y los hallazgos imagenológicos, paraclínicos y electrocardiográficos sugirieron como primera posibilidad pericarditis purulenta, lo cual se confirmó por las características de líquido pericárdico, que era compatible con un exudado. La resolución clínica, apoyada por el manejo antibiótico y a pesar de no obtener aislamiento microbiológico en los cultivos, corroboró el diagnóstico. Conclusiones. La pericarditis purulenta es una enfermedad poco frecuente en pediatría pero con alta mortalidad. Realizar un diagnóstico oportuno sumado a un tratamiento tempano se relaciona con un mejor pronóstico de esta patología.

La enfermedad de Kawasaki es un estado febril agudo, cuya incidencia es de 175 por cada 100.000 ninos ˜ menores de 5 anos. ˜ Es una vasculitis con predilección por los vasos de pequeno˜ y mediano calibre, especialmente por las arterias coronarias; sin tratamiento pueden desarrollarse aneurismas coronarios que conllevan riesgo de infarto agudo de miocardio y muerte súbita. Se describe el caso de un nino˜ de 4 anos ˜ a quien se diagnosticó enfermedad de Kawasaki y aneurismas fusiformes moderados en las arterias coronarias derecha e izquierda. En control a los dos meses desarrolló nuevo cuadro febril con hipercolesterolemia, trombocitosis y alteración de las pruebas hepáticas. En ecocardiograma de control se evidenció aneurisma gigante en la coronaria izquierda y mediante angiografía coronaria se detectaron dos aneurismas en la coronaria derecha. En vista de que se consideró un caso de evolución atípica, se realizó revisión de la literatura mundial en enfermedad de Kawasaki y se recomendó diagnóstico y tratamiento precoz para disminuir la morbilidad con compromiso cardiovascular severo y/o la mortalidad. Kawasaki disease is an acute febrile state with an incidence of 175 per 100,000 children under the age of 5. It is a vasculitis with a preference for small and mediumsized vessels, especially for coronary arteries. If untreated, coronary aneurysms may pose the risk of acute myocardial infarction and sudden death. The case of a 4 year-old child who was diagnosed of Kawasaki disease and moderate fusiform aneurysms in the right and left coronary arteries is described. Follow-up visit after two months revealed fever again with hypercholesterolemia, thrombocytosis and abnormal liver testing. Control echocardiogram evidenced a giant aneurysm in the left coronary and a coronary angiography detected two additional aneurysms in the right coronary. As this was considered an atypical progress of the condition, review of global Kawasaki disease literature was carried out and early diagnosis and treatment were recommended to reduce morbidity with severe cardiovascular involvement and/or mortality.

Altas dosis acumuladas de antraciclinas y la exposición a radioterapia torácica, son los principales factores predictores de falla cardíaca en la población pediátrica con cáncer. En el siguiente trabajo se describe la toxicidad aguda y temprana asociado al uso de antraciclinas y ciclofosfamida en una población pediátrica, de pacientes con diagnostico de leucemias agudas, en un hospital de referencia de Bogotá. Investigación en curso, se realiza un informe de los resultados parciales. De 76 pacientes, 19 ( 25% ) presentaron complicaciones cardiovasculares, la más frecuente disfunción cardíaca. Todas las toxicidades fueron tempranas, ninguna fue inmediata. Se presentó elevación del péptido natriurético cerebral tipo B, en pacientes hiperhidratados al ingreso y de estos, los que tuvieron valores muy elevados, presentaron complicaciones cardiovasculares. Ningún paciente tuvo elevación de troponinas séricas. Al parecer la caída de la deformación longitudinal global del ventrículo izquierdo, predice la disfunción cardíaca asociado al uso de estos antineoplásicos. Se esperan resultados finales de la investigación. Abstract: High cumulative doses of anthracyclines and exposure to thoracic radiation therapy are the main predictors of heart failure in the pediatric population with cancer. The following paper describes the acute and early toxicity associated with the use of anthracyclines and cyclophosphamide in a pediatric population of patients diagnosed with acute leukemia in a reference hospital in Bogotá. Research in progress, a report of the partial results is made. Of 76 patients, 19 (25%) had cardiovascular complications, the most frequent cardiac dysfunction. All toxicities were early, none was immediate. Elevation of type B brain natriuretic peptide was observed in hyperhidrated patients at admission, and of these, those who had very high values, presented cardiovascular complications. No patient had elevation of serum troponins. It seems that the fall of the global longitudinal deformation of the left ventricle predicts the cardiac dysfunction associated with the use of these antineoplastics. Final results of the investigation are expected. . Otra