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Table 2 Variants of Normal Anatomy that Can Predispose Patient to Chronic Rhinosinusitis

From: Advances in the Surgical Management of Chronic Rhinosinusitis

Concha bullosa (pneumatized middle turbinate)

Paradoxically curved middle turbinate

Atelectatic uncinate process

Infraorbital ethmoid pneumatization (Haller's cell)

Agger nasi air cell