Osteoma of the Internal Auditory Canal

Vrabec, Jeffrey T.; Lambert, Paul R.; Chaljub, Gregory

doi:10.1001/archotol.126.7.895

Cited by 30 publications

(26 citation statements)

References 14 publications

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“…Cranial vault lesions would be better compared to lesions of the external auditory canal. Thawley et al (1999) and Vrabec et al (2000) differentiated auditory canal lesions into osteomas and exostoses. An osteoma is defined as an isolated bony, exophytic, pedunculated papillomatous protrusion with a narrow neck.…”

Section: Is Btl An Osteoma?mentioning

confidence: 99%

Button osteoma: Its etiology and pathophysiology

Eshed

Latimer

Greenwald

et al. 2002

American J Phys Anthropol

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The present study investigates a circumscribed bony overgrowth on the cranial vault, known as button osteoma (BtO) and referred to here as button lesion (BtL). We discuss its anthropological implications. Data on its histology, location, and population distribution (by age, race, and gender) are provided. Microscopically, BtL is composed of well-organized dense lamellated bone which is poorly vascularized and with very few osteocytes. It forms a dome-shaped roof over an underlying diploeized area which includes the ectocranial table. The frequency of BtL is similar in modern (37.6%) and archaeological (41.1%) populations, in blacks, whites, males, and females, and correlates with age. It is rare in nonhuman primates. Fifty-five percent of the human skulls studied by us had BtL only on the parietal, 23.6% on the frontal, and 3.6% on the occipital bones. Fifteen percent had BtL on both the frontal and parietal bones. No lateral preference was found. Most skulls with BtL (64.1%) had only one lesion, 20.4% had two BtL, and 15.4% demonstrated multiple BtL. The average number of button osteomas on an affected skull was 1.97. The frequency of large osteomas (0.5-1.0 cm) was similar in young and old age groups. The demographic characteristics of BtL, mainly its high frequency among ancient and modern populations, its independence of sex and race, its scarcity in other primates, and the fact that its macro- and microstruture are indicative of an hamartoma (and not an osteoma or exostosis) suggest an evolutionary background to the phenomenon.

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Section: Is Btl An Osteoma?mentioning

confidence: 99%

Button osteoma: Its etiology and pathophysiology

Eshed

Latimer

Greenwald

et al. 2002

American J Phys Anthropol

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“…A previous review of 13 cases of IAC osteoma reported from 1882 to 1993 identified several clinical characteristics as follows: mean age of 57 years; female-to-male ratio of 5.5:1, suggesting a particular predilection for postmenopausal women; and 42% of the patients had no symptoms, 42% had hearing loss, 25% had tinnitus, and 33% had vertigo (Clerico et al 1994). Our present study summarized and reviewed 17 cases of IAC osteoma reported in the past 22 years (1992-2013) (Singh et al 1992;Ramsay and Brackmann 1994;Coakley et al 1996;Wright et al 1996;Boedts et al 1997;Davis et al 2000;Vrabec et al 2000;Kovacić et al 2001;Gerganov et al 2008;Liétin et al 2010;Baik et al 2011;Kaymakci et al 2012;Plantone et al 2013) and excluded the previously reviewed cases by Clerico et al (1994) (Table 1). Mean age was 44.1 years (male: 44.0, female: 44.2), and femaleto-male ratio was 1.4:1.…”

Section: Discussionmentioning

confidence: 99%

“…Further improvements in imaging technology are needed for effective neuroimaging diagnosis of small IAC tumors. The differential diagnoses of IAC osteoma with the exception of bony lesions include vestibular schwannoma, facial nerve schwannoma, meningioma, hemangioma, lipoma, and cholesteatoma (Vrabec et al 2000). With the widespread introduction of imaging devices, the incidental diagnosis of smaller and asymptomatic vestibular schwannomas has increased (Lin et al 2005).…”

Section: Discussionmentioning

confidence: 99%

Osteoma of the Internal Auditory Canal Mimicking Vestibular Schwannoma: Case Report and Review of 17 Recent Cases

Suzuki

Takata

Miyazaki

et al. 2014

Tohoku J. Exp. Med.

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Osteoma of the internal auditory canal (IAC) is an uncommon benign bone tumor. Its imaging features may be similar to other IAC lesions, such as vestibular schwannomas that are benign and usually slow-growing but sometimes life-threatening tumors. Thus, detecting IAC lesions and differentiating osteoma from other IAC lesions are both important clinically. We report a case of misdiagnosis of an IAC osteoma as an IAC schwannoma based on magnetic resonance (MR) imaging using the three-dimensional constructive interference in steady state (CISS) sequence instead of T1-weighted MR imaging with gadolinium. We also review 17 cases of IAC osteomas reported in the past 22 years. A 61-year-old female was admitted to our department with IAC lesion incidentally discovered by the CISS sequence. The lesion was diagnosed as an IAC schwannoma, and was followed up annually under "wait and scan" management. Follow-up T1-weighted MR imaging with gadolinium showed no enhancement of the tumor, and additional computed tomography (CT) of the temporal bone showed a solitary pedunculated bony lesion, resulting in the diagnosis of IAC osteoma. The CISS sequence is useful for detecting small IAC lesions, such as vestibular schwannomas. However, the CISS sequence has limitations for qualitative diagnosis and can misdiagnose osteomas as schwannomas. Use of the CISS sequence without T1-weighted MR imaging with gadolinium for the screening of a lesion of the IAC and cerebellopontine angle should consider the possibility of IAC osteomas, and temporal bone CT or T1-weighted MR imaging with gadolinium should be performed when an IAC lesion is detected.

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“…In addition to primary causes of IAC narrowing, an osseous lesion such as an exostosis or an osteoma can cause secondary narrowing of IAC. Also Paget's disease, otosclerosis and fibrous dysplasia can cause narrowing of the canal [6][7][8] .…”

Section: Discussionmentioning

confidence: 99%

Unilateral internal auditory canal stenosis with progressive facial weakness

Murali

Shekhar

Sudhakar

et al. 2012

Bangladesh J of Otorhinolaryngology

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Internal auditory canal (IAC) stenosis is a rare cause of sensorineural hearing loss. Patient may present with symptoms of progressive facial nerve palsy, hearing loss, tinnitus and giddiness. High resolution temporal bone CT-scan and magnetic resonance imaging (MRI) are the important tools for diagnosis. No specific management has been devised. Here is presentation of a case of unilateral (left) IAC stenosis with profound hearing loss and progressive House Brackmann Grade III-IV facial weakness. The diameter of the IAC was less than 2 mm on high resolution temporal bone computed tomography (HRCT) scan. It was managed by facial nerve decompression by translabyrinthine approach in an attempt to prevent further deterioration of facial palsy. DOI: http://dx.doi.org/10.3329/bjo.v18i2.12014 Bangladesh J Otorhinolaryngol 2012; 18(2): 179-182

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Osteoma of the Internal Auditory Canal

Abstract: The lack of a consistent presentation despite a similar radiographic appearance suggests that the osteoma is often an incidental finding.

Cited by 30 publications

References 14 publications

Button osteoma: Its etiology and pathophysiology

Button osteoma: Its etiology and pathophysiology

Osteoma of the Internal Auditory Canal Mimicking Vestibular Schwannoma: Case Report and Review of 17 Recent Cases

Unilateral internal auditory canal stenosis with progressive facial weakness

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