Otosclerosis is a genetically mediated metabolic bone disease of unknown etiology. This favors the diagnosis of cholesteatoma. There were granulations on the left ear drum.ĬT demonstrates a soft tissue mass between the ossicular chain and the lateral tympanic wall, which is eroded. On the left a 20-year old woman with recurrent otitis. Large cholesteatomas can erode the auditory ossicles and the walls of the antrum and extend into the middle cranial fossa.Īuditory ossicles, especially the long process and lenticular processes of the incus as well as the head of the stapes In more extensive disease erosions may be present. On CT a small cholesteatoma presents as a soft tissue mass. Scraps of cholesteatoma are visible in the external auditory canal. The ENT surgeon often states that cholesteatoma is a clinical diagnosis. Most cholesteatomas are acquired, but some are congenital. It gradually enlarges over time due to exfoliation and encapsulation of the tissue. Lateral semicircular canal malformationĬholesteatoma is believed to arise in retraction pockets of the eardrum.MRI is more useful for diseases of the inner ear.ĭisease processes in the pontine angle and in the internal acoustic meatus are not discussed. The aim of this presentation is to demonstrate imaging findings of common diseases of the temporal bone.ĬT is the imaging modality of choice for most of the pathologic conditions of the temporal bone, especially for those of the middle ear. How to Differentiate Carotid Obstructions.TI-RADS - Thyroid Imaging Reporting and Data System.Head Neck tumors - When to think of malignancy.Esophagus II: Strictures, Acute syndromes, Neoplasms and Vascular impressions.Esophagus I: anatomy, rings, inflammation.Vascular Anomalies of Aorta, Pulmonary and Systemic vessels.Contrast-enhanced MRA of peripheral vessels.Ischemic and non-ischemic cardiomyopathy. ![]() Coronary Artery Disease-Reporting and Data System 2.0.Bi-RADS for Mammography and Ultrasound 2013.Transvaginal Ultrasound for Non-Gynaecological Conditions.Acute Abdomen in Gynaecology - Ultrasound.Appendicitis - Pitfalls in US and CT diagnosis.
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