Paradoxical middle turbinate

Paradoxical middle turbinate is a rare developmental cause of nasal obstruction. It refers to an inferomedially curved middle turbinate edge with the concave surface facing the nasal septum and usually occurs bilaterally.

Epidemiology

Paradoxical middle turbinate is a rarely encountered anomaly and can be easily recognized in CT paransal sinuses but can be overlooked on endoscopic examination 3.

The prevalence reported by different authors may diverge because some of them consider any involved portion of the turbinate as paradoxical curvature, whereas others may consider this variation only in cases where the whole turbinate is unusually curved towards the opposite side 4.

Another study indicated paradoxical middle turbinate represents 9% of total anatomical variations.

Radiographic features

This anatomic variant alone can lead to significant narrowing of the middle nasal meatus and impede the normal drainage of paranasal sinuses due to ostiomeatal complex obstruction 2. When associated with a bulbous middle turbinate, it can potentially lead to nasal obstruction 2.

Head and neck anatomy
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Article information

rID: 47185
System: Head & Neck
Section: Anatomy
Tag: cases
Synonyms or Alternate Spellings:
  • Paradoxical middle turbinates

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Cases and figures

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