A 40-year-old man presented with left-side nasal obstruction for the past nine months. He had been treated for allergic rhinitis with nasal steroids for a long time. An anterior rhinoscopic examination was normal. Endoscopic examination revealed a nodulary mass in the nasopharynx, partially obstructing the left choana (Figure 1A). An endoscopic examination of the right nasopharynx revealed regu...

BACKGROUND Ebstein-Barr virus (EBV) plays a critical role in nasopharynx cancer, which can be effectively monitored by serum levels of early antigen antibody (EA-IgA) and viral capsid antigen antibody (VCA-IgA). This study explored the diagnostic value of combined assays of sialic acid (SA), EA-IgA, and VCA-IgA via the expressional assay. MATERIAL AND METHODS A total of 42 nasopharynx cancer pa...

Considerable evidence has implicated Streptococcus pneumoniae neuraminidase in the pathogenesis of otitis media (OM); however, its exact role has not been conclusively established. Recently, an S. pneumoniae neuraminidase-deficient mutant, DeltaNA1, has been constructed by insertion-duplication mutagenesis of the nanA gene of S. pneumoniae strain D39. The relative ability of DeltaNA1 and the D3...