Abstract
Postoperative temporal bone imaging after surgical procedures such as ossiculoplasty, tympanomastoidectomy, cochlear implantation, and vestibular schwannoma resection is often encountered in clinical neuroradiology practice. Less common otologic procedures can present diagnostic dilemmas, particularly if access to prior operative reports is not possible. Lack of familiarity with the less common surgical procedures and expected postoperative changes may render radiologic interpretation challenging. This review illustrates key imaging findings after surgery for Ménière disease, superior semicircular canal dehiscence, temporal encephalocele repairs, internal auditory canal decompression, active middle ear implants, jugular bulb and sigmoid sinus dehiscence repair, and petrous apicectomy.
Highlights
Reinforcement or occlusion of round window reformatted parallel to the long axis of petrous bone), Superior semicircular canal dehiscence (SSCD) is characterized by parallel or diverging walls of the SSC as they approach the floor of the middle cranial fossa (MCF).[15]
Surgeries for SSCD are directed toward repair of the dehiscence by canal plugging, resurfacing, or combinations thereof.[16]
There are a variety of materials most commonly include fascia and bone grafts and, less AMEIs available, some of which are FDA approved in the United commonly, bone cement. In those patients with concomitant SSCD, States while others are available in Europe.[26]
Summary
Less efficacious in long-term a Modified with permission from Mau et al,[16] Ward et al,[17] and Succar et al.[19]. Surgery Technique Approach Most Suitable for All kinds of SSC repair: canal resurfacing, plugging, capping. Canal plugging and modified resurfacing (of SSC sidewalls and not directly over dehiscence). Reinforcement or occlusion of round window reformatted parallel to the long axis of petrous bone), SSCD is characterized by parallel or diverging walls of the SSC as they approach the floor of the middle cranial fossa (MCF).[15]. Surgeries for SSCD are directed toward repair of the dehiscence by canal plugging, resurfacing, or combinations thereof.[16] Both transmastoid and MCF approaches have been described with a .90% success rate (Table).[17,18]. Examples of materials used include bone wax, bone chips, and temporalis fascia for canal plugging and cartilage, bone, temporalis fascia, and hydroxyapatite bone cement for resurfacing.[17]
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