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Objective To investigate the clinical significance of specific IgE‐staphylococcal enterotoxin B (IgE‐SEB) in CRS (chronic rhinosinusitis). Design Retrospective analysis of patients who were positive for specific IgE‐staphylococcal enterotoxin B. Setting Tertiary rhinology clinic. Participants A total of 965 patients who were tested for specific IgE‐staphylococcal enterotoxin B from December 2016 to December 2017. Main outcome measures We retrospectively reviewed the records of 965 patients who were tested for specific IgE‐staphylococcal enterotoxin B from December 2016 to December 2017. Patient demographics, titre‐specific IgE to staphylococcal enterotoxin B levels, MAST, serologic test and medical records were reviewed. Results IgE‐SEB (KU/L) was higher in CRS patients than non‐CRS patients (0.13 ± 0.37 vs 0.08 ± 0.22, respectively; P‐value: .044), and the IgE‐SEB (+, ≥0.35) rate was also higher (10.06% vs 4.46%, respectively; P‐value: .030). IgE‐SEB (KU/L) was higher in the CRS group than in the fungal sinusitis group (0.13 ± 0.37 vs 0.03 ± 0.05, respectively; P‐value: <.001), and the IgE‐SEB (+, ≥0.35) rate was also higher (10.06% vs 0%, respectively; P‐value: .015). Between the CRSsNP (chronic rhinosinusitis without nasal polyps) and CRSwNP (chronic rhinosinusitis with nasal polyps) groups, there were no differences in IgE‐SEB (KU/L) or IgE‐SEB (+) rates. IgE‐SEB positivity was not associated with the presence of polyps, concomitant asthma or postoperative recurrence. As the values of IgE‐SEB (KU/L) and the IgE‐SEB (+, >0.1) rate increased, the CRS severity also increased. Conclusions IgE‐SEB showed a positive correlation with Lund‐Mackay CT severity score, but not with postoperative recurrence or nasal polyps. Further studies are needed to obtain clear evidence that IgE‐SEB can be considered as an independent CRS endotype.

A 52-year-old woman presented with a slightly painful swelling of the right cheek area without postprandial aggravation of the symptom last 1 week. On physical examination, an approximately 1.5 cm sized firm, slightly tender mass was palpated on the right mid-cheek region, and she did not show any abnormal findings on neurologic examination. Computed tomography showed a well-enhanced lesion with low density of internal portion in right cheek area, and tiny calcification was noted within internal low-density portion of cheek mass. These findings suggested sialolithiasis of an accessory parotid gland with duct dilatation. Mid-cheek pain with conservative medical treatment was resolved and has not occurred during 1 year follow-up.