Table 2.

Patients’ examination results.

Patient number	Age (years)	Gender	Endoscopic findings	CT findings
1	20	Female	The nasal mucosa is red; The nasal septum is basically in the middle; The bilateral middle nasal meatus changes postoperatively; The bilateral uncinate process and anterior ethmoidal air chamber are missing, and there is no purulent secretion in each nasal meatus and nasopharynx.	The nasal septum is in the middle; Local thickening of left maxillary sinus mucosa; There was no soft tissue density shadow in frontal sinus and frontal recess; Bony blockage of bilateral frontal recess (Figures 1A,D,G,J)
2	42	Female	The color of nasal mucosa is normal; The nasal septum is basically in the middle; There is no swelling of bilateral lower turbinate; There is no purulent secretion in each nasal tract and nasopharynx	The nasal septum is in the middle; Bone hyperplasia of the right maxillary sinus, density shadow of soft tissue in the sinus, considering the possibility of fungal infection (but it was found that it was not fungal mass, but bone hyperplasia during operation); There was no soft tissue density shadow in frontal sinus and frontal recess; Bony blockage of bilateral frontal recess (Figures 1B,E,H,K)
3	38	Male	The nasal mucosa is red, the nasal septum is basically in the middle, and there is no purulent secretion in each nasal tract and nasopharynx	The nasal septum is in the middle; The mucosa of left maxillary sinus was slightly thickened; There was no soft tissue density shadow in frontal sinus and frontal recess; Bony blockage of bilateral frontal recess (Figures 1C,F,I,L)