Radiographically, the compact lesion appears as a well-ĭefined, occasionally lobulated dense bony mass. There are two types of osteomas: cancellous and compact. White mass which is often peduncolated and covered with apparently normal skin. Examination of the external auditory canal reveals a smooth, It is typically unilateral and presents most commonly in children and young adults. Whithin the temporal bone it is seen commonly in the external ear canal, where the osteomaĪppears as a single bony mass occluding the lumen. Osteoma is a benign peduncolated tumor of the lamellar bone, which commonly originate from paranasal sinus. The mass was “occupying” a considerable part of the medial (part) of the external auditory canal but the examination did not show invasion of mastoid ossicularĬhain and tympane membrane were intact(Fig2 3). A CT scan of the skull showed a small mass of the leftĮxternal auditory canal. Understanding of temporal bone anatomy and improves the ability to evaluate related disease, thereby helping to optimize surgical planning. The additional information provided by 3D images allows a better Greater detail and may help increase the accuracy of CT for the diagnosis of diseases of the external, middle and inner ear. This technique gives the opportunity to visualize the anatomic structures of the external, middle and inner ear in The development of multidetector scanners allows theĪcquisition of isotropic voxels that can be reconstructed in any plane of section. Post-processing included MPR and 3D volume rendering (Fig 4.) and were performed on an off-line console. The scans are performed without intravenous application of contrast material and by the use of post-processing in a high Structures of the temporal bone and demonstrate calcification (Fig.1). The CT images provide an excellent bone contrast, which is important to evaluate the bony Haemotological parameters were within the normal range. Clinical examination, audiometric and vestibular test results did not reveal the origin of A 43 year old man presented with a six-month history of progressive conductive hearing loss and tinnitus.
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