Figure legend:
Fig.1. The sinusitis occurs in maxillary, anterior, posterior ethmoid, frontal and sphenoid sinuses: a: maxillary, ethemoid sinuses; b: anterior ethmoid sinuses; c: posterior ethmoid sinuses; d: frontal sinus; e: sphenoid sinues
Fig.2. Anatomic variations in pediatric chronic rhinosinusitis:a: agger nasi cells; b: bilateral inferior turbinate hypertrophy; c: septal deviation>3mm; d: concha bullosa ; e: Onodi cells; f: Haller cells ; g: paradoxical middle turbinate