Diagnosis and treatment of invasive fungal disease in children with hematological malignancies after chemotherapy: Challenges and strategies (Review).
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Invasive fungal disease (IFD) has a high incidence rate in pediatric patients with hematological malignancies and hematopoietic stem cell transplantation, markedly elevating mortality rates. Major pathogens include Aspergillus, Candida and emerging non-Aspergillus molds. Clinical manifestations such as persistent fever and dyspnea are frequently non-specific, complicating early diagnosis. Invasive candidiasis typically manifests as candidemia or hepatosplenic infection, whereas invasive aspergillosis predominantly involves the lower respiratory tract. Prophylactic antifungal therapy reduces IFD risk but may lead to breakthrough IFD, particularly during prolonged neutropenia (>14 days). Treatment strategies require individualized selection between monotherapy and combination regimens, incorporating patient status, local epidemiology, prior antifungal exposure, drug metabolism and socioeconomic factors; however, treatment strategies can be hindered by diagnostic challenges including age-specific biomarker thresholds. Emerging techniques such as metagenomic next-generation sequencing show promise for rapid pathogen identification. Central nervous system involvement occurs in a certain proportion of pediatric cases and requires multimodal intervention. Early diagnosis through optimized imaging and timely initiation of targeted therapy are key to overcome clinical challenges and improving prognosis in this vulnerable population. The present review aimed to systematically review the epidemiological characteristics, diagnostic challenges and therapeutic strategies of IFD in pediatric hematological malignancies post-chemotherapy. By collating current clinical evidence, the present review provides an evidence-based framework for optimizing management in this high-risk population.