Evaluation of the pharyngeal recess with cone-beam computed tomography
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ORIGINAL ARTICLE
Evaluation of the pharyngeal recess with cone‑beam computed tomography Şule Erdem1 · Ayşe Zeynep Zengin1 · Şuheda Erdem1 Received: 4 June 2020 / Accepted: 6 August 2020 © Springer-Verlag France SAS, part of Springer Nature 2020
Abstract Purpose To evaluate the radiological anatomy of the pharyngeal recess (PR) by gender and age. Methods Images of patients who underwent cone-beam computed tomography (CBCT) were analyzed retrospectively. A total of 600 PRs (140 male, 160 female) were examined. PR depths, distances between the posterior nasal spine (PNS) and the posterior wall of the pharynx, right and left torus levatorius lengths, and distances between the right and left torus levatorius were measured on the axial plane passing through the PNS–basion point. Results PR depths differed significantly between age groups (right p = 0.030, left p = 0.047). The PR depths of individuals under 35 years of age were significantly higher than those of individuals aged 35 and over. Further, the distances between the PNS and the posterior wall of the pharynx differed significantly between age groups and between gender groups. The distances between the PNS and the posterior wall of the pharynx were shorter in patients under 35 years of age (p = 0.000). In terms of gender, these distances were significantly longer in males (p = 0.014). The distances between the right and left torus levatorius were also significantly longer in males (p = 0.029). Conclusion The PR is the region in which nasopharyngeal carcinoma originates most frequently and is very important for early diagnosis. The present results indicated that this region can be examined with CBCT. Keywords Nasopharynx · Cone-beam computed tomography · Nasopharyngeal carcinoma · Temporomandibular joint dysfunction syndrome
Introduction The anatomy of the pharyngeal recess (PR) was first described in 1808 by the German anatomist Johann Christian Rosenmüller. The PR is a bilateral formation of the nasopharynx just below the skull base. It is also called the fossa of Rosenmüller. The fossa is covered by the nasopharyngeal mucosa and is the most common site of nasopharyngeal carcinoma (NPC) [1].
* Şule Erdem [email protected] Ayşe Zeynep Zengin [email protected] Şuheda Erdem [email protected] 1
Department of Dentomaxillofacial Radiology, Dentistry Faculty, Ondokuz Mayıs University, Atakum, 55270 Samsun, Turkey
The anatomical limits of the fossa are described as follows: anteriorly, eustachian tube and m.levator veli palatini; posteriorly, posterior wall of the nasopharynx and retropharyngeal space; laterally, parapharyngeal space and m.tensor veli palatine; inferiorly, superior border of the m. constrictor superior; superiorly, skull base. The PR extends laterally behind the pharyngeal opening of the eustachian tube. At the roof of the PR, only a thin layer of fibro-connective tissue separates the mucosa from the cervical internal carotid artery [1]. In the time since Rosenmüller’s description, much has been learned about the PR. For ex
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