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Computed tomography findings. Axial and frontal sections in the subtypes of eosinophilic chronic rhinosinusitis with nasal polyps (ECRSwNP) (A and C) and non-eosinophilic chronic rhinosinusitis with nasal polyps (NECRSwNP) (B and D). Predominant diseases in bilateral anterior and posterior ethmoid sinuses are showed in ECRSwNP, while predominant diseases in anterior ethmoid sinuses in NECRSwNP.
