Background Exostoses of the internal auditory canal is a rare finding that may present with disabling symptoms of dizziness, hearing loss, and vestibular dysfunction based on the extent of cranial nerve compression. The purpose of this case report is to discuss the presentation and outcomes in a patient who presented with this disorder. Case Description A 19-year-old female presented to the n...

Osteomas are rare benign bone tumors of the bone lamellar portion, that usually originate from the paranasal sinuses where they are pedicled. In the temporal bone, they are usually found in the external auditory canal and are extremely rare in the middle ear. Temporal bone osteomas have a preference for the outermost portion of the external auditory canal, while exostoses affect its most intern...

Department of Radiology, Otolaryngology-Head and Neck Surgery, Yonsei University Wonju College of Medicine, Wonju, Korea. Received September 3, 2003 ; Accepted February 13, 2004 Address reprint requests to : Ki-jun Sung, M.D., Department of Radiology, Wonju College of Medicine, Yonsei University, Wonju Christian Hospital, 162 Ilsan-dong, Wonju, Kangwon-do, 220-701, Korea, Tel. 82-33-741-1475 Fa...

Computed tomography is effective for detecting acoustic neuromas, but not for resolving individual nerves in the internal auditory canal. Surface-coil magnetic resonance (MR) images of the internal auditory canal were obtained using a 1.5 T superconducting magnet, a 13.5-cm-diameter surface coil, 3- and 5-mm-thick slices, and partial-saturation pulse sequences. Cranial nerves VII and VIII (thre...

The tumors of the external auditory canal are relatively rare. Among these tumors an osteoma is not common. Two cases of osteoma of the external auditory canal were reported. The patient, 26-year-old female, had a history of left-sided hearing impairment and w hard mass protruding from the posterior part of the left external canal. A stony hard mass almost completely occlu ded the left external...

BACKGROUND Schwannomas are uncommon benign tumors of the external auditory canal. The clinical features, the differential diagnosis, and the surgical treatment of these lesions are discussed. CASE PRESENTATION A 51-year-old patient presented with a mass obliterating the external auditory meatus. Excisional biopsy was performed. Diagnosis was reported to be schwannoma by histopathologic examin...

This investigation is based on measurements of 60 macerated adult European skulls from the Alexander-Ecker Collection at the Anatomy Department of the University of Freiburg. Computer tomographical (CT) and anatomical measurements were compared to assess the accuracy of the CT representation of osseous structures. Nine structures were examined: the optic canal; the superior orbital fissure; the...

Nonfilling of the normal internal auditory canal on computed tomographic (CT) gas cisternography was observed in seven (11%) of 62 cases in a retrospective study of three series of gas cisternograms. The meatal surface of the fluid-filled canal was convex and pointed, simulating a small acoustic neuroma. A meniscus effect at the gas-cerebrospinal fluid interface was considered the probable caus...

PURPOSE To define the anatomy of the facial and vestibulocochlear nerves in the internal auditory canal on parasagittal CT scans of cadaveric specimens and to compare this anatomy with findings on in vivo T2-weighted two-dimensional fast spin-echo and three-dimensional turbo spin-echo MR images. METHODS Thirty-eight formalin-fixed cadaveric temporal bones were examined with 1-mm-thick contigu...