CT
Axial bone window
Axial non-contrast
Coronal bone window
Narrowed right posterior choanal opening (measures 2.5 mm) compared to the left side (measures 5 mm) secondary to medial bowing of the posterior maxilla and thickened vomer. The right nasal cavity is seen obliterated with a plug of retained secretions. Normal aeration of the left nasal cavity and left-sided nasal septal deviation.