Profil tomodensitométrique des lésions du rocher : analyse descriptive et corrélation radio-clinique à propos de 174 examens.

Abstract

Objectives : Describe the CT profile of petrous bone lesions.

Materials and Methods : This prospective study, conducted from January 2024 to January 2025, included 116 patients who underwent temporal bone computed tomography (CT) for the evaluation of hearing loss or otologic abnormalities. Examinations were performed using a Revolution ACT(Advanced Computed Tomography) 16 helical scanner following a standardized protocol, with fine axial and coronal acquisitions without contrast injection, except in cases with suspected inflammatory, infectious, or tumoral pathology.

Results :The study population had a mean age of 29 ± 5 years (range 1–72 years) with a slight female predominance (sex ratio = 0.92). Hearing loss was bilateral in 51.8 % of cases and unilateral in 48.2 %, distributed between 53.4 % of hypoacusis and 46.6 % of deafness. Tinnitus was the most common associated symptom (33.6 %).

CT scans were normal in 58.62 % of cases and abnormal in 41.38 %. Detected lesions involved were bilateral in (41.38%) and unilateral in (58.62%). the middle ear (47.69 %), inner ear (27.69 %), and external ear (24.62 %). The main etiologies included otitis (47.91 %), malformations (20.83 %), otospongiosis (14.58 %), mastoiditis (8.33 %), trauma (6.25 %), and tumors (2.1 %). Acute otitis, the most frequent entity (65.22 %), was often associated with ossicular lysis (12 %).

Conclusion : CT imaging proved particularly efficient in analyzing bony morphology, determining the extent of lesions, and guiding therapeutic decision-making.