Methods
It is a literature review and case report, written based on the PRISMA-E 2012 reporting guide (Preferred Reporting Items for Systematic Reviews and Meta-Analyzes)17. The PICO system (Population, Intervention, Comparison and Outcome) was followed and no specific protocol was used for its elaboration.
The PubMed, ScienceDirect, BIREME (Lilacs and Medline) and Scielo databases were used. The keyword ”fungus ball” combined with ”paranasal sinuses”, ”fungal rhinosinusitis”, ”frontal sinus” was used.
The inclusion criteria were prospective and retrospective studies on fungal rhinosinusitis and fungal ball in human paranasal sinuses, these being case reports and review articles, respectively. The exclusion criteria were articles in vitro, in animal models, or that did not cover the central theme of the research.The articles were extracted in duplicate and these were stored in EndNote - Clarivate Analytics.