An Anatomical Evaluation of the Rosenmuller Fossa Using Cone Beam Computed Tomography: A Retrospective Cross-Sectional Study
Komal Ravindra Deotale, Isha Madne, Vidyarjan SukhadeveBackground:
Rosenmuller fossa (RF) is an important anatomical recess in the nasopharynx. It is clinically significant because of its association with early changes in nasopharyngeal carcinoma. Variations such as asymmetry or obliteration indicate underlying pathology. Its proximity to vital structures, such as the internal carotid artery and eustachian tube, necessitates careful radiographic assessment.
Objective:
To assess the prevalence and distribution of morphological variations of the RF using cone beam computed tomography (CBCT).
Methods:
A retrospective cross-sectional analysis was conducted on 130 CBCT scans obtained using the ORTHOPHOS SL system and analyzed with Sidexis 4 software. Based on depth and opening width, the fossa was classified into three types: Type 1 (shallow recess <5 mm), Type 2 (deep recess ≥5 mm with a narrow opening <1 mm), and Type 3 (deep recess ≥5 mm with an opening ≥1 mm).
Results:
In males, Type 1 predominated bilaterally, whereas females showed a predominance of Type 3. Individuals aged 15–34 years predominantly exhibited Type 1; individuals aged 35–54 years showed mixed Types 1 and 3; and individuals aged ≥55 years showed a predominance of Type 3.
Conclusion:
Routine CBCT includes the nasopharyngeal region and frequently reveals incidental findings. Structured evaluation of this recess aids early detection of nasopharyngeal pathology.