Profile of Temporal Bone Computed Tomography Examinations at the University Hospital Center (CHU) Campus of Lomé
Abstract
Introduction: The petrous bone is the inferior part of the temporal bone. It plays a crucial role in hearing and balance in the human body and is the site of a wide variety of pathologies, making it a public health concern. The aim of this study was to determine the profile of petrous bone computed tomography (CT) examinations.
Methods: This was a prospective, descriptive study conducted over a 6-month period, involving 34 petrous bone CT examinations performed in the CT unit of the CHU-Campus in Lomé. The parameters analyzed included epidemiological data and lesions identified on CT imaging.
Results: Out of 6,328 CT examinations performed during the study period, 34 were petrous bone CT scans, representing 0.5%. All age groups were affected, with a predominance of the 31-40 year age group (23.5%). Males were predominant, with a sex ratio of 2.1. Drivers were the most represented occupational group (23.5%). The most frequent indication was petrous bone trauma (44.1%), with road traffic accidents being the leading cause (73.3%). In all cases, the examination was performed without contrast injection. CT findings were pathological in 70.6% of cases, mainly in trauma, conductive hearing loss, chronic otitis media, external auditory canal (EAC) stenosis, and pulsatile tinnitus. The main traumatic lesion identified was extra labyrinthine fractures (91.7%). Incudo-malleolar dislocation was the most common ossicular lesion (25%). Hemotympanum was observed in 83.3% of cases. CT scans were normal in 29.4% of cases, particularly in patients with vertigo/tinnitus, mixed hearing loss, conductive hearing loss associated with tinnitus, otalgia, and non-traumatic facial paralysis.
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Copyright (c) 2026 Judith Edwige Guiaba Kette Mokpondo, Timothee Mobima, Aime Stephane Kouzou, Chrispin Euloge Tapiade, Francky Kouandongui Bangue Songrou, Christ Borel Tambala, Heritier Yannick Sombot Soule, Lantam Sonhaye, Victor Adjenou

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