The mRNA expression levels of miRNA machinery components including Drosha, Dicer, protein activator of the interferon-induced protein kinase (PACT), human immunodeficiency virus transactivating response RNA-binding protein, fragile X mental retardation protein, and argonaute 2/eukaryotic translation initiation factor 2C, 2 in nasal biopsies from control, CRS without nasal polyps (CRSsNP), eosinophilic, and noneosinophilic CRS with nasal polyps (CRSwNP) subjects were determined by quantitative reverse transcription polymerase chain reaction.