Prognostic Factors in the Outcome of Invasive Fungal Sinusitis in a Pediatric Population.

Background: Pediatric invasive fungal sinusitis (IFS) is rare, and its prognosticators are poorly understood. The aim of this study was to determine important factors affecting outcome. Methods: A 10-year retrospective review at a tertiary academic children's hospital was performed using an International Classification of Diseases, 9th revision, and a procedure-based search after institutional review board approval. All relevant demographic and clinical information was collected. Results: Fourteen immune-compromised patients (male:female = 7:7, mean age = 10 years, range 2-16 years) were identified who had hematologic malignancies (11), diabetes mellitus (2) and unknown predisposing factors (1). Fungal species included Aspergillus (5), Mucor (5), Alternaria (2), Rhizopus (1) and Scopulariopsis (1). The cohort underwent an average of 6.1 (median = 5) endoscopic sinus surgeries and were treated with aggressive antifungal therapy. Four deaths occurred in the study population: 2 were attributable to IFS and 2 attributable to their underlying malignancies. There was a significant difference in the median absolute neutrophil count (ANC) at follow-up after treatment of IFS between the survival and the mortality subgroups, with ANC being 4290.5 and 169, respectively (P < 0.001). Conclusions: Despite the small sample size, this study represents the largest case series in the medical literature on pediatric IFS. Age, gender, underlying cause for immunodeficiency and mycologic agent were not important prognosticators. ANC appears to be the only factor responsible for survival. The role of endoscopic sinus surgeries in survival is indeterminate.