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Do the upper lateral nasal cartilages exist? The concept of septolateral cartilages

Abstract : Background: In the cartilaginous nose, classical surgical anatomy describes 2 triangular upper lateral cartilages (ULCs) framing the lateral sides of the mid-third of the nasal pyramid, which articulate with to the superior edge of the quadrangular cartilage (QC) of the nasal septum. This anatomic arrangement in 3 distinct cartilage parts is, however, controversial. Objective: The present study aimed to describe the articulation between the ULCs and the QC, avoiding dissection artefacts. Materials and methods: Six nasal pyramids were taken in monobloc from fresh cadavers and imaged on micro-MRI with 0.4mm slice thickness. Images were interpreted jointly by 2 head and neck surgeons and a radiologist. Results: The cartilage skeleton supporting the mid-third of the nasal dorsum in all specimens presented as 2 septal plates backing onto the midline and curving on either side to form a continuous dome under the inferior aspect of the piriform aperture. Conclusion: Like the alar cartilages framing the tip of the nose, there are two continuous septolateral cartilages (SLCs) framing the mid-third of the nasal pyramid, likewise showing 2 cruras, medial and lateral, joined in a dome. The SLCs (also known as triangular cartilages) thus cannot be separated as 2 individual anatomic structures. These findings are in line with the shared embryological origin of all the elements composing the fibrocartilaginous nose in evo-devo theory.
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Submitted on : Friday, May 28, 2021 - 3:19:58 PM
Last modification on : Friday, December 3, 2021 - 2:26:02 PM

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M. Varoquier, C. Rumeau, P.A. Vuissoz, M. Perez, G. Hossu, et al.. Do the upper lateral nasal cartilages exist? The concept of septolateral cartilages. European Annals of Otorhinolaryngology, Head and Neck Diseases, Elsevier Masson, 2021, 138 (2), pp.77-81. ⟨10.1016/j.anorl.2020.06.017⟩. ⟨hal-03241295⟩



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