• Chien-Heng Lin, Chieh-Ho Chen, Syuan-Yu Hong, Sheng-Shing Lin, I-Ching Chou, Hsiao-Chuan Lin, and Jeng-Sheng Chang.
• Division of Pediatric Pulmonology, China Medical University Children's Hospital.
• Medicine (Baltimore). 2021 Apr 30; 100 (17): e25716e25716.

AbstractAlthough influenza is generally an acute, self-limited, and uncomplicated disease in healthy children, it can result in severe morbidity and mortality. The objectives of this study were to analyze and compare the clinical features and outcome of severe pediatric influenza with and without central nervous system (CNS) involvement.We conducted a retrospective observational study of children admitted to the pediatric intensive care unit (PICU) of China Medical University Children's Hospital in Taiwan with a confirmed diagnosis of influenza. The demographic data, clinical and laboratory presentations, therapeutic strategies, and neurodevelopmental outcomes for these patients were analyzed. Furthermore, comparison of patients with and without CNS involvement was conducted.A total of 32 children with severe influenza were admitted during the study periods. Sixteen children were categorized as the non-CNS (nCNS) group and 16 children were categorized as the CNS group. Nine of them had underlying disease. The most common complication in the nCNS group was acute respiratory distress syndrome, (n = 8/16), followed by pneumonia (n = 7/16, 44%). In the CNS group, the most lethal complication was acute necrotizing encephalopathy (n = 3/16) which led to 3 deaths. The overall mortality rate was higher in the CNS group (n = 6) than in the nCNS group (n = 1) (37.5% vs 6.25%, P = .03).The mortality rate of severe complicated influenza was significantly higher with CNS involvement. Children with primary cardiopulmonary abnormalities were at high risk of developing severe complicated influenza, while previously healthy children exhibited risk for influenza-associated encephalitis/encephalopathy.Copyright © 2021 the Author(s). Published by Wolters Kluwer Health, Inc.

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