A Study of Different Endoscopic Surgery Procedures in Eosinophilic Chronic Rhinosinusitis With Nasal Polyps

Inclusion Criteria

• •The diagnosis of CRSwNP was based on the standard criteria issued in the European Position Paper on Rhinosinusitis and Nasal Polyps guidelines.
• •Participants had at least 1 previous sinus surgery underwent FESS (middle turbinate (MT) preserved), good gasification of frontal sinus and with concomitant asthma.
• •The diagnosis of asthma was confirmed by a chest physician according to Global Initiative for Asthma (GINA) guidelines.
• •Polyp biopsy was undertaken 1 week before surgery and the eCRSwNP was confirmed by the number of eosinophils exceeded 10% of total infiltrating inflammatory cells in the polyp tissue through the evaluation by using hematoxylin and eosin (H\&E) staining.