Objective To detect pepsin in the nasopharyngeal secretions in children with adenoid hypertrophy(AH), and then to explore its association with AH. Methods The pediatric AH patients and the pediatric patients without AH or tonsil hypertrophy(TH) were collected as experiment group and control group, respectively. The pepsin level in the nasopharyngeal secretions and adenoid tissues was detected using an enzyme linked immunosorbent assay kit, and then compared between the experiment group and the control group...