Role of systemic immune-inflammatory index and systemic inflammatory response index in predicting the diagnosis of necrotizing pneumonia in children.

BACKGROUND: Necrotizing pneumonia (NP) is a rare serious complication of community-acquired pneumonia (CAP) in children, which is characterized by a protracted course of the disease and a prolonged hospital stay. This study aimed to assess the role of systemic immune-inflammatory index and systemic inflammatory response index in predicting early lung necrotization in children with CAP. METHODS: This study included all children hospitalized in Pediatric Pulmonology Unit, Tanta University, Egypt, with CAP between the ages of two months and 18 years. Systemic inflammatory indices, including the neutrophil/lymphocyte ratio (NLR), platelet/lymphocyte ratio (PLR), monocyte/lymphocyte ratio (MLR), systemic immune-inflammatory index (SII), and systemic inflammation response index (SIRI), were calculated on patients' admission. RESULTS: The study involved a total of 228 children, 42 patients had NP, 46 patients had parapneumonic effusion, and 140 patients had non-complicated CAP. Patients with NP were substantially younger (p = 0.002), stayed in the hospital longer (p < 0.001), had a longer duration of symptoms before hospital admission (p < 0.001), and had fever for a longer duration than those in the other groups (p < 0.001). Regarding the inflammatory ratios, patients with NP had significantly higher MLR, PLR, SII, and SIRI than those in the other groups (p = 0.020, p = 0.007, p = 0.001, p = 0.037, respectively). ROC curve analysis showed that the combined SII + SIRI + D-dimer showed the highest AUC with a good specificity in predicting the diagnosis of NP. CONCLUSIONS: SII, SIRI, and D-dimer may be beneficial biomarkers for predicting the occurrence of NP in children when performed on patients' admission. In addition, it was found for the first time that combined SII + SIRI + D-dimer had a good sensitivity and specificity in the diagnosis of NP.

Predictive value of lactate dehydrogenase for Mycoplasma pneumoniae necrotizing pneumonia in children based on decision curve analysis and dose-response analysis.

Mycoplasma pneumoniae necrotizing pneumonia (MPNP) has a long and severe disease course, which seriously threatens to jeopardize patients' lives and health. Early prediction is essential for good recovery and prognosis. In the present study, we retrospect 128 children with MPNP and 118 children with Mycoplasma pneumoniae pneumonia combined with pulmonary consolidation to explore the predictive value of lactate dehydrogenase (LDH) in children with MPNP by propensity score matching method, multiple logistic regression analysis, dose-response analysis and decision curve analysis. The WBC count, PLT count and percentage of neutrophils were significantly higher in necrosis group than consolidation group. The serum CRP, PCT, ESR, D-D, FIB, ALT, LDH, IgG and IgM were significantly higher in necrosis group. Compared to consolidation group, necrosis group is more severe in chest pain and dyspnea. Multivariate logistic regression analysis showed that duration of LDH levels, high fever, D-dimer, and fibrinogen were independent predictive factors for the incidence of MPNP. Restricted cubic spline analysis showed that a non-linear dose-response relationship between the continuous changes of LDH level and the incidence of MPNP. Decision curve analysis revealed that LDH had an important clinical value in predicting MPNP. This study provides a potential serologic indicator for early diagnosis of MPNP.

Necrotizing pneumonia in children: Report of 25 cases between 2008 and 2018 at a French tertiary care center.

BACKGROUND: Necrotizing pneumonia (NP) is a serious and rare disease in children. Pediatric data on NP are limited and the impact of the 13-valent pneumococcal conjugate vaccine has been very poorly evaluated. PATIENTS AND METHODS: We conducted a retrospective study at Toulouse University Hospital between 2008 and 2018. Children who presented with thin-walled cavities in the areas of parenchymal consolidation on imaging were included in the study. RESULTS: The incidence of NP did not decrease during this period. Bacterial identification occurred in 56% of cases (14/25) and included six cases of Streptococcus pneumoniae, five of Staphylococcus aureus, two of Streptococcus pyogenes, and one of Streptococcus viridans. Streptococcus pneumoniae NP are more frequently associated with empyema/parapneumonic effusion compared to S. aureus NP (p = 0.02). Patients with S. pyogenes NP more often required volume expansion than did S. pneumoniae cases (p = 0.03). When comparing children born before and after implementation of the 13-valent pneumococcal conjugate vaccine, we identified a relative modification of the bacterial epidemiology, with an increase in the proportion of S. pyogenes NP and S. aureus NP and a decrease in the proportion of NP caused by S. pneumoniae. CONCLUSION: Future studies are needed to assess the epidemiology of NP in children. Continued surveillance of identified pneumococcal serotypes is essential to document epidemiological changes in the coming years.

Necrotizing pneumonia due to Aspergillus and Salmonella after immune checkpoint inhibitor treatment: An unusual case and review of the literature / Neumonía necrotizante por Aspergillus y Salmonella tras tratamiento con un inhibidor de puntos de control inmunitario: un caso inusual y revisión de la literatura

Background: Immune checkpoint inhibitors (ICIs) are a promising new treatment for different types of cancer. The infectious complications in patients taking ICIs are rare. Case report: A 58-year-old male who received chemotherapy consisting of pembrolizumab (PD-1 inhibitor) for esophagus squamous cell carcinoma one month before was admitted to the emergency room with shortness of breath soon after fiberoptic bronchoscopy, which was done for the inspection of the lower airway. A computed tomography of the chest revealed a progressive consolidation on the right upper lobe. Salmonella group D was isolated from the bronchoalveolar lavage (BAL) fluid culture. The fungal culture of the same clinical sample yielded Aspergillus niger; furthermore, a high titer (above the cut-off values) of Aspergillus antigen was found both in the BAL fluid and serum of the patient. Despite the effective spectrum and appropriate dose of antimicrobial treatment, the patient died due to disseminated intravascular coagulopathy. Conclusions: Awareness of unusual pathogens in the etiology of pneumonia after ICI treatment may help to avoid underdiagnosis.(AU)

Antecedentes: Los fármacos inhibidores de puntos de control inmunitario (ICI) son una nueva y prometedora opción de tratamiento para diferentes tipos de cáncer. Las complicaciones infecciosas en pacientes que toman ICI son poco frecuentes. Caso clínico: Un varón de 58 años que recibió quimioterapia con pembrolizumab (inhibidor de PD-1) para un carcinoma de células escamosas de esófago hacía un año, ingresó en Urgencias por dificultad respiratoria poco después de realizarse una broncoscopia de fibra óptica para una inspección de las vías aéreas inferiores. La tomografía computarizada de tórax reveló una consolidación progresiva en el lóbulo superior derecho. Se aisló Salmonella grupo D en el cultivo del líquido de lavado broncoalveolar (LBA). En el cultivo de hongos de la misma muestra creció Aspergillus niger; además, se detectó antígeno (por encima de los valores de corte) de Aspergillus tanto en la muestra del LBA como en el suero del paciente. A pesar del espectro eficaz y la dosis adecuada del antifúngico utilizado, el paciente falleció debido a una coagulopatía intravascular diseminada. Conclusiones: El conocimiento de patógenos inusuales en la etiología de la neumonía tras el tratamiento con ICI puede ayudar a evitar el infradiagnóstico.(AU)

Tratamiento definitivo de Fistula Broncopleural de difícil manejo con terapia de presión negativa / Definitive treatment of difficult-to-manage Bronchopleural Fistula with negative pressure therapy

Las fistulas bronquiales ocurren como complicaciones de múltiples enfermedades del tórax y procedimientos. El tratamiento de las mismas después de una lobectomía es complicado y requieren largas hospitalizaciones. La Terapia de presión negativa (TPN) ha demostrado beneficios y evidencias en el manejo de las fistulas broncopleurales. Masculino de 25 años de edad, con antecedente de tuberculosis con tratamiento completo, posterior presentó neumonía necrotizante en lóbulo superior derecho y empiema, realizando lobectomía complicándose con fistula broncopleural e infecciones a repetición, requiriendo ventana pulmonar y múltiples internaciones con diferentes tratamientos hasta ser manejada con el sistema presión negativa (TPN) con mejoría marcada. (AU)

Bronchial fistulas occur as complications of multiple chest diseases and procedures. Their treatment after a lobectomy is complicated and requires long hospital stays. Negative pressure therapy (NPT) has shown benefits and evidence in the management of bronchopleural fistulas. A 25-year-old male, with a history of tuberculosis with complete treatment, subsequently presented necrotizing pneumonia in the right upper lobe and empyema, performing lobectomy, complicating with bronchopleural fistula and recurrent infections, requiring a pulmonary window and multiple hospitalizations with different treatments until managed with the negative pressure system (NPT) with marked improvement. (AU)

Pseudoaneurisma iatrogénico de arteria pulmonar segmentaria por neumonía necrosante tras colocación de sonda nasogástrica intrapulmonar / Iatrogenic Segmental Pulmonary Artery Pseudoaneurysm Due to Necrotizing Pneumonia After Intrapulmonary Nasogastric Tube Placement

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[Translated article] Iatrogenic Segmental Pulmonary Artery Pseudoaneurysm Due to Necrotizing Pneumonia After Intrapulmonary Nasogastric Tube Placement / Pseudoaneurisma iatrogénico de arteria pulmonar segmentaria por neumonía necrosante tras colocación de sonda nasogástrica intrapulmonar

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Analysis of clinical features and risk factors of necrotizing pneumonia in children / 北京大学学报(医学版)

OBJECTIVE@#To investigate the clinical characteristics and risk factor analysis of necrotizing pneumonia in children.@*METHODS@#A retrospective study was used to analyze the case data of 218 children with severe pneumonia hospitalized in the Department of Respiratory Medicine, Children's Hospital of Capital Institute of Pediatrics from January 2016 to January 2020, and they were divided into 96 cases in the necrotizing pneumonia group (NP group) and 122 cases in the non-necrotizing pneumonia group (NNP group) according to whether necrosis of the lung occurred. The differences in clinical characteristics (malnutrition, fever duration, hospitalization time, imaging performance, treatment and regression follow-up), laboratory tests [leukocytes, neutrophil ratio, platelet (PLT), C-reactive protein (CRP), procalcitonin (PCT), D-dimer, and lactate dehydrogenase (LDH)] and bronchoscopic performance between the two groups were compared, and Logistic regression analysis of clinical risk factors associated with necrotizing pneumonia was performed to further determine the maximum diagnostic value of each index by subject operating characteristic curve (ROC). The critical value of each index was further determined by the ROC.@*RESULTS@#The differences in age, gender, pathogenic classification, and bronchoscopic presentation between the two groups of children were not statistically significant (P>0.05); whereas the imaging uptake time of the children in the NP group was higher than that in the NNP group (P < 0.05). The differences in malnutrition, fever duration, length of stay, white blood cell count, neutrophil ratio, CRP, PCT, and D-dimer were statistically significant between the two groups (P < 0.05). The imaging uptake time was lower in children under 6 years of age than in those over 6 years of age, and the imaging uptake time for bronchoalveolar lavage within 10 d of disease duration was lower than that for those over 10 d; the imaging uptake time was significantly longer in the mixed infection group than that in the single pathogen infection group. Logistic regression analysis of the two groups revealed that the duration of fever, hospital stay, CRP, PCT, and D-dimer were risk factors for secondary pulmonary necrosis (P < 0.001, P < 0.001, P < 0.001, P=0.013, P=0.001, respectively). The ROC curves for fever duration, CRP, PCT, and D-dimer were plotted and found to have diagnostic value for predicting the occurrence of pulmonary necrosis when fever duration >11.5 d, CRP >48.35 mg/L, and D-dimer > 4.25 mg/L [area under ROC curve (AUC)=0.909, 0.836, and 0.747, all P < 0.001].@*CONCLUSION@#Children with necrotizing pneumonia have a longer heat course and hospital stay, and the imaging uptake time of mixed pathogenic infections is significantly longer than that of single pathogenic infections. Children with necrotizing pneumonia under 6 years of age have more advantageous efficacy of electronic bronchoscopic alveolar lavage within 10 d of disease duration compared with children in the group over 6 years of age and children in the group with disease duration >10 d. Inflammatory indexes CRP, PCT, and D-dimer are significantly higher. The heat course, CRP, PCT, and D-dimer are risk factors for secondary lung necrosis in severe pneumonia. Heat course >11.5 d, CRP >48.35 mg/L, and D-dimer >4.25 mg/L have high predictive value for the diagnosis of necrotizing pneumonia.

Necrotizing pneumonia due to Streptococcus pneumoniae in children during the period of non-systematic use of PCV13 in Catalonia, Spain / Neumonía necrosante por Streptococcus pneumoniae en niños durante el periodo de uso no sistemático de la PCV13 en Cataluña, España

Background: Some studies have observed an increased incidence of necrotizing pneumonia (NP) in recent years. This might be related to the emergence of non-vaccine S. pneumoniae serotypes after PCV7 introduction although it is suggested that evolutionary factors may have modified the virulence and the interactions of pneumococci. The aim of this study was to clinically and microbiologically define NP in the population served by the three major paediatric hospitals in Barcelona (Catalonia, Spain). Methods: A prospective observational study was conducted in patients <18 years hospitalized due to invasive pneumococcal disease (January 2012–June 2016). Data of confirmed cases of pneumococcal NP (diagnosed by culture or DNA detection and serotyped) were collected. PCV13 was not systematically administered in Catalonia during the study period, but was available in the private market so the vaccination coverage in children increased from 48.2% to 74.5%. Results: 35 cases of NP were identified. 77.1% of cases were associated with empyema. In the first 4 years, a trend to a decrease in NP incidence was observed (p=0.021), especially in children <5 years (p=0.006). Serotype 3 was responsible for 48.6% of NP cases. Five patients with NP due to serotype 3 were fully vaccinated for their age with PCV13. Conclusions: Serotype 3 has a preeminent role in pneumococcal NP and was associated with all PCV13 vaccination failures. Although in our series the incidence does not seem to be increasing, evolution of pneumococcal NP rates should be monitored after inclusion of PCV13 in the systematic calendar.(AU)

Antecedentes: En algunos estudios se ha observado un aumento de la incidencia de neumonía necrosante (NN) en los últimos años. Dicho aumento podría estar asociado a la aparición de serotipos de S. pneumoniae no vacunales después de la introducción de la PCV7, aunque se sugiere que factores evolutivos podrían haber modificado la virulencia y las interacciones de los neumococos. El objetivo de este estudio fue definir clínica y microbiológicamente la NN en la población tratada en los 3 hospitales pediátricos principales de Barcelona (Cataluña, España). Métodos: Se llevó a cabo un estudio observacional prospectivo en pacientes <18 años hospitalizados a causa de una enfermedad neumocócica invasiva (enero de 2012-junio de 2016). Se recopilaron datos de casos confirmados de NN neumocócica (diagnosticada mediante cultivo o detección de ADN y serotipado). La PCV13 no se administró de forma sistemática en Cataluña durante el periodo del estudio, pero se encontraba disponible en el mercado privado, por lo que la cobertura de vacunación en niños pasó del 48,2 al 74,5%. Resultados: Se identificaron 35 casos de NN. El 77,1% de los casos estuvieron asociados a un empiema. En los primeros 4 años se observó una tendencia decreciente de la incidencia de NN (p=0,021), especialmente en niños <5 años (p=0,006). El serotipo 3 causó el 48,6% de los casos. Cinco pacientes con NN debida al serotipo 3 estaban completamente vacunados para su edad con la PCV13. Conclusiones: El serotipo 3 desempeña un papel prominente en la NN neumocócica y se asoció a todos los fracasos de vacunación de la PCV13. Aunque en nuestra serie la incidencia no parece estar aumentando, debe controlarse la evolución de las tasas de NN neumocócica tras la inclusión de la PCV13 en el calendario sistemático.(AU)

Resultados a largo plazo de la neumonía necrotizante / Long-term outcomes of necrotizing pneumonia

Introducción: La neumonía necrotizante (NN) es una complicación grave de la neumonía adquirida en la comunidad caracterizada por la destrucción del parénquima pulmonar normal. Ningún estudio ha evaluado las consecuencias de este daño pulmonar en los años posteriores al episodio. El objetivo es investigar el impacto a largo plazo sobre la función pulmonar y los síntomas respiratorios en niños ingresados por NN.Métodos: Seguimiento de niños diagnosticados de NN desde enero-2003 hasta abril-2016. Se seleccionó a los mayores de 4años, capaces de realizar una función pulmonar, y un seguimiento durante más de 2años. Los pacientes recibieron un cuestionario respiratorio y completaron una prueba de función pulmonar.Resultados: Se incluyeron 24 pacientes (12 hombres). La edad mediana en el momento del diagnóstico fue de 26 meses, 15 días de hospitalización y 18 pacientes necesitaron drenaje pleural. Los pacientes fueron seguidos durante un promedio de 8,75años después de la NN. Durante la evaluación, ningún paciente tuvo asma, tos o sintomatología inducida por el ejercicio. Tres niños sufrieron una segunda neumonía, que no requirió hospitalización. Los resultados de la espirometría fueron (media±desviación estándar): Z-score FEV1 −0,47 ±0,65, Z-score FVC −0,56±0,73, Z-score FEV1/FVC 0,19±0,98. No hubo evidencia de enfermedad pulmonar obstructiva o patrones restrictivos.Conclusiones: Los resultados a largo plazo de la NN pediátrica son buenos. Sin embargo, los pacientes tienen una función pulmonar ligeramente disminuida varios años después del episodio. Es aconsejable hacer un seguimiento de estos pacientes debido a la posible disminución de la función pulmonar en edad adulta. (AU)

Introduction: Necrotizing pneumonia (NP) is a serious complication of community-acquired pneumonia characterised by the destruction of normal lung parenchyma. No study has evaluated the repercussions of the lung damage in the years following the episode. The aim of this study was to assess the long-term impact on lung function and respiratory symptoms in children hospitalised due to NP.Methods: We analysed outcomes in children given a diagnosis of NP between January 2003 and April 2016. We selected patients aged more than 4 years capable of undergoing a lung function test, that had been followed up for at least 2 years. The patients completed a respiratory questionnaire and underwent a lung function test.Results: We included a total of 24 patients (12 male). The median age at the time of diagnosis was 28 months, the median length of stay was 15 days, and 18 patients required pleural drainage. The mean duration of follow-up after NP was 8.75 years. During the evaluation, none of the patients exhibited asthma, cough, or exercise-induced symptoms. Three children had a second episode of pneumonia that did not require hospital admission. The spirometry results were the following (given as mean ± standard deviation): FEV1 z-score, −0.47±0.65; FVC z-score, −0.56±0.73; and FEV1/FVC z-score, 0.19±0.98. We found no evidence of obstructive pulmonary disease or restrictive patterns.Conclusions: The long-term outcomes of paediatric NP are good. However, patients exhibited mildly impaired lung function several years after the episode. We recommend follow-up of these patients due to potential impairments in lung function in adulthood. (AU)

Neumonía necrotizante: experiencia en el Hospital Roberto del Río período 2014 a 2020 / Necrotizing pneumonia: experience at the Roberto del Río Hospital from 2014 to 2020

La neumonía necrotizante se refiere a la necrosis del parénquima pulmonar producto de una infección. Existe escasa literatura nacional sobre esta complicación. OBJETIVO: Caracterizar a los pacientes que cursaron con neumonía necrotizante en el Hospital Roberto del Río entre los años 2014 y 2020. MÉTODO: Revisión retrospectiva y descriptiva. RESULTADOS: 22 pacientes. Promedio de edad 4 años 7 meses, 68% masculino, esta complicación correspondió a 1,3% de todos los casos de neumonía hospitalizados en ese periodo. Un 95,5% presentó fiebre y un 59% dificultad respiratoria y tos. La duración promedio de la hospitalización fue de 31 días y del tratamiento antibiótico de 30,3 días. El 63% de los pacientes requirió cirugía. En el laboratorio destaca la leucocitosis y proteína C reactiva elevados con 71,4% > a 90 mg/L (promedio: 211 mg/L) y 52,3% leucocitosis > 15.000 (promedio: 18.127). La ecografía torácica fue la imagen más frecuentemente utilizada (95,5%). Agentes identificados Streptococcus pneumoniae (40%) y Staphylococcus aureus (40%). Un 63,6% ingresó a UCI, 35,7% requirió ventilación mecánica invasiva, 35,7% recibió drogas vasoactivas, 9% requirió de soporte ECMO (Oxigenación por Membrana Extracorpórea) y 1 paciente falleció (4,5%). DISCUSIÓN: en nuestro estudio encontramos una baja incidencia de esta patología, un alto índice de gravedad y una evolución favorable en la gran mayoría de los casos.

Necrotizing pneumonia refers to necrosis of lung parenchyma resulting from an infection. There is little national literature on this complication. OBJECTIVE: To characterize patients with necrotizing pneumonia at the Roberto del Río Children´s Hospital between 2014 to 2020. METHOD: Retrospective and descriptive review. RESULTS: A total of 22 patients, average age 4 years 7 months, male (68%). Average incidence 1.3% in 7 years; 95.5% had fever 59% had respiratory distress and cough. Average duration of hospitalization was 31 days and antibiotic treatment 30.3 days. A 63% of the patients had surgery. Leukocytosis and C-reactive protein (CRP) were elevated, 71.4% CRP > 90 mg /L (average: 211 mg /L) and 52.3% leukocytosis > 15.000 (average: 18.127). Chest ultrasound was used in 95.5%. Main agents identified were Streptococcus pneumoniae (40%) and Staphylococcus aureus (40%). A 63.6% of patients were admitted to ICU, 35.7% required invasive mechanical ventilation, 35.7% received vasoactive drugs, 9% required ECMO (Extracorporeal Membrane Oxygenation), and one patient died (4,5%). DISCUSSION: In our study we found a low incidence of this pathology, a high severity index an a favorable evolution in most cases.