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open access eISSN 2093-3673

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Anat Cell Biol

Published online May 22, 2024


Copyright © Korean Association of ANATOMISTS.

Middle meatal nasal recesses of the maxillary sinuses and dangerously modified nasal anatomy

Mugurel Constantin Rusu , Alexandru Nicolae Mureşan , Carol Antonio Dandoczi , Alexandra Diana Vrapciu

Division of Anatomy, Department 1, Faculty of Dentistry, Carol Davila University of Medicine and Pharmacy, Bucharest, Romania

Correspondence to:Mugurel Constantin Rusu
Division of Anatomy, Department 1, Faculty of Dentistry, Carol Davila University of Medicine and Pharmacy, Bucharest 050474, Romania
E-mail: mugurel.rusu@umfcd.ro

Received: January 26, 2024; Revised: March 20, 2024; Accepted: April 12, 2024

This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/4.0/) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.


Pneumatisation of the maxillary sinus (MS) is variable. The archived cone-beam computed tomography file of a 54-year-old female was retrospectively evaluated anatomically. Nasal or retrobullar recesses of the MSs (NRMS) were found. The MSs were bicameral. NRMSs extended from the postero-lateral chambers of the MSs into the lateral nasal walls. The right NRMS was reached superior to the middle turbinate and the ethmoidal bulla was applied on its anterior side. The left NRMS had two medial pouch-like ends, one beneath the ethmoidal bulla and the other on the anterior side of the basal lamella of the middle turbinate. Additional anatomical findings were the uncinate bulla, infraorbital recesses of the MS, maxillary recess of the sphenoidal sinus, and atypical posterior insertions of the superior nasal turbinates, maxillo-ethmoido-sphenoidal and ethmoido-sphenoidal. The NRMS is a novel finding and could lead to erroneous endoscopic corridors if not documented before the interventions.

Keywords: Nasal cavity, Turbinates, Paranasal sinuses, Maxilla, Ethmoid bone

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