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The secondary middle turbinate.

K Khanobthamchai¹, L Shankar, M Hawke

¹Department of Otolaryngology, University of Toronto, Ontario, Canada.

The Journal of Otolaryngology

|December 1, 1991

Summary

A rare anatomical variation, the secondary middle turbinate, was found in 1.5% of nasal CT scans. This finding, located in the middle meatus, did not obstruct the osteomeatal complex in patients undergoing sinus surgery.

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Area of Science:

Anatomy
Radiology
Otolaryngology

Background:

Functional endoscopic sinus surgery (FESS) involves accessing the ethmoidal infundibulum and bulla via the middle meatus.
Anatomical variations in the sinonasal region can impact surgical approaches and outcomes.

Purpose of the Study:

To describe a secondary middle turbinate, an uncommon anatomical variation.
To report the prevalence of this variation on CT scans and assess its relationship with the osteomeatal complex.

Main Methods:

Retrospective analysis of 400 coronal CT scans of the nasal cavity and paranasal sinuses.
Identification and documentation of secondary middle turbinate presence, location, and laterality.

Main Results:

A secondary middle turbinate was identified bilaterally in 6 out of 400 patients (1.5%).
This anatomical variation arises from the lateral wall of the middle meatus, superior to the infundibulum.
No obstruction of the osteomeatal complex was observed in any patient with this finding.

Conclusions:

The secondary middle turbinate is a rare anatomical variation of the middle turbinate.
Its presence, as identified on CT scans, does not appear to compromise the osteomeatal complex.
Awareness of this variation is important for surgeons performing FESS.

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