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Anatomic Relationship Between the Head of the Middle Turbinate and First Olfactory Filum: A Radiographic Assessment.

Authors :
Obermeyer IP
Nguyen CH
Yoo F
Garg R
Kuan EC
Source :
The Annals of otology, rhinology, and laryngology [Ann Otol Rhinol Laryngol] 2024 Apr; Vol. 133 (4), pp. 418-423. Date of Electronic Publication: 2024 Jan 19.
Publication Year :
2024

Abstract

Background: The endoscopic modified Lothrop procedure (EMLP) has become a frequently utilized procedure in rhinologic surgery. One of the most serious complications of the procedure is cerebrospinal fluid leak, which may occur due to lack of recognition of the anterior skull base in the region of the first olfactory filum (FOF), or direct injury to the FOF itself.<br />Objectives: To evaluate the position of the head of the middle turbinate (MT) relative to the FOF, which is an important landmark in the EMLP.<br />Methods: A series of previously obtained patient computed tomography scans of the sinus were reviewed. A reproducible process was implemented to obtain the measurements. First, the FOF was identified on an axial series. Using a localization feature of the radiographic software, this anteroposterior (AP) position could be visualized in a coronal plane. Subsequently, the MT was viewed in a sagittal plane, where a measurement between the head of the MT and the AP position of the FOF could be performed.<br />Results: The AP distance between the head of the MT and the FOF was measured in 92 patients. The head of the MT was either at or anterior to the FOF in all measured subjects. The mean anterior distance of the head of the MT to FOF was 3.6 mm (±2.4 mm) on the right, and 3.8 mm (±2.2 mm) on the left. The range in AP distance was 0 to 12 mm. There was no significant difference in AP distance between the head of the MT and FOF based on gender ( P  = .413) or diagnosis ( P  = .254).<br />Conclusions: In our study, the head of the MT was reliably at or anterior to the FOF in all subjects, suggesting its utility as a fixed landmark in endoscopic sinus surgery, particularly in the EMLP.<br />Level of Evidence: N/A.<br />Competing Interests: Declaration of Conflicting InterestsThe author(s) declared no potential conflicts of interest with respect to the research, authorship, and/or publication of this article.

Details

Language :
English
ISSN :
1943-572X
Volume :
133
Issue :
4
Database :
MEDLINE
Journal :
The Annals of otology, rhinology, and laryngology
Publication Type :
Academic Journal
Accession number :
38240258
Full Text :
https://doi.org/10.1177/00034894241227034