"M" line: New anatomical landmark for the maxillary sinus natural ostium. (27th January 2020)

• Record Type: Journal Article
• Authors: Leite, Janaina Gonçalves da Silva; Nogueira, Joao Flavio; Pallanch, John; da Costa, Ticiana Cabral; Feijão, Moisés Ximenes; Querido, Raquel de Sousa Lobo Ferreira; Cavalcante, Maria Luzete Costa
• Is Part Of: Clinical otolaryngology. Volume 45:Number 2(2020)
• Page Start: 177
• Page End: 181
• Publication Date: 2020-01-27
• Subjects: anatomical landmarks -- endoscopy -- maxillary sinus -- maxillary sinusitis -- minimally invasive surgical procedures -- paranasal sinuses -- sinus surgery; Otolaryngology -- Periodicals; 617.51005
• DOI: 10.1111/coa.13456
• Languages: English
• ISSNs: 1749-4478

Abstract

Abstract: Objective: Describe a reliable anatomical landmark that can be used to locate the maxillary sinus natural ostium (MSNO) during endoscopic surgery, even if the uncinate process is preserved. Design: Descriptive anatomical. Setting: An anatomical and radiological study was performed to evaluate the consistency of the landmark, denominated "M" line. Subjects and Methods: Dissections were performed in 57 cadaver heads (114 sides). In addition, 73 computerised tomography (CT) scans (146 sides) of patients with chronic inflammatory sinonasal disease were analysed using a three‐dimensional (3D) reconstruction computer program. Results: The "M" line crossed the MSNO in 112 dissected sides (98.2%) and 140 sides at CT 3D reconstruction (95.9%). Conclusion: The "M" line is a reliable anatomical landmark for predicting MSNO location. As such, it could improve and facilitate endoscopic sinus surgery, using traditional, minimally invasive or uncinate preserving techniques.