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Aetiological derivation of structural nasal obstruction. Structural abnormalities of the external nasal morphology, nasal septum, nasal cavity, maxilla and anterior ethmoid complex, which cause remodelling (compensation) of the nasal structure (including the inferior turbinate, middle turbinate and anterior ethmoid complex). Failed compensation leads to structural nasal obstruction. Nasal septum deviation is only one of a number of structural anomalies in structural nasal obstruction.
