Prevalence of the prelacrimal recess in maxillary sinus and its medial bony wall dimensions
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RHINOLOGY
Prevalence of the prelacrimal recess in maxillary sinus and its medial bony wall dimensions Zhaoyue Chen1 · Qinglian Wang2 · Peng Wang1 Received: 19 June 2020 / Accepted: 23 September 2020 © Springer-Verlag GmbH Germany, part of Springer Nature 2020
Abstract Objective To investigate the occurrence rate of the prelacrimal recess (PLR) and its medial bony wall dimensions based on the radiological analysis to help surgeons enhance the understanding of anatomic structures for the endoscopic prelacrimal recess approach. Methods Cone-beam computed tomography images of 255 patients were evaluated retrospectively. The prevalence of the PLR in maxillary sinus was investigated and the thickness of its medial bony wall was measured and statistically assessed. Meanwhile, the width of the PLR was measured. The correlation between the width of the PLR and its medial bony wall thickness was assessed. The data were compared between the left side and right side, male and female. Results The PLR was present in 82.5% of the maxillary sinus, with no significant differences between the left and right sides, as well as different gender groups. The mean thickness of the medial bony wall of the PLR was 2.84 ± 1.41 mm, without statistical difference between the left and right sides but significantly larger in males than in females. The mean width of the PLR was 4.62 ± 1.74 mm and it had a significant negative correlation with the thickness of the medial bony wall of the PLR. Conclusion A large individual variation exists in the anatomy of PLR, including its prevalence and dimensions of its medial bony wall. When considering the intranasal endoscopic prelacrimal recess approach, the surgeons should carefully evaluate the anatomical structure of the PLR preoperatively so as to minimize the risks of surgical complications. Keywords Prelacrimal recess · Prelacrimal recess approach · Endoscopic sinus surgery · Maxillary sinus · Cone-beam computed tomography
Introduction Nasal endoscopic techniques have undergone tremendous advancement in the past decade. Recently, several modifications of endoscopic medial maxillectomy have been proposed utilizing the prelacrimal recess (PLR) as a route to enter the maxillary sinus (MS). The endoscopic prelacrimal recess approach (PLRA), which is also called the prelacrimal Zhaoyue Chen , Qinglian Wang, and Peng Wang contributed equally to the study. * Zhaoyue Chen [email protected] 1
Department of Otolaryngology, Xiamen Branch, Zhongshan Hospital, Fudan University, No. 668 JinHu Road, Xiamen, China
Department of Stomatology, Xiamen Branch, Zhongshan Hospital, Fudan University, Xiamen, China
2
duct approach or modified nasal lateral wall resection [1] or endoscopic prelacrimal medial maxillectomy [2], provides the surgeon with a corridor to the anterior MS [3–9], pterygopalatine fossa [10, 11], lateral recess of sphenoid sinus [12], infratemporal fossa [10, 11, 13], inferior intraconal space [14], or middle cranial fossa, whilst preserving the function of the inferior t
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