Osteoma of the Internal Auditory Canal

Estrem, Scott A.; Vessely, Michelle B.; Oró, J.

doi:10.1177/019459989310800314

Cited by 33 publications

(29 citation statements)

References 8 publications

(2 reference statements)

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“…The radiological margins of these lesions are less evident than those of osteomas [23]. In the present case, a well demarcated, hyperdense, large pedunculated mass located in the preauricular area was demonstrated by CT and 3D reconstruction.…”

Section: Discussioncontrasting

confidence: 48%

“…Differential diagnoses of osteomas include exostosis, hamartoma, periosteal osteoblastoma, osteoid osteoma [19,22], osteosarcoma, Paget's disease, fibrous dysplasia, odontoma, chronic focal sclerosing osteomyelitis, ossifying fibroma, chondroma [7,11], osteoblastic metastasis, isolated eosinophilic granuloma, giant cell tumor, calcified meningioma, and monostatic fibrous dysplasia [23]. The radiological margins of these lesions are less evident than those of osteomas [23].…”

Section: Discussionmentioning

confidence: 99%

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An unusual peripheral osteoma of the mandibular notch: a case report with computed tomography evaluation

et al. 2011

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An osteoma, a slow-growing benign osseous neoplasm of the bone, is characterized by a proliferation of osteoblasts that form bone trabeculae in the connective tissue stroma. It is an uncommon condition that generally occurs in the maxillofacial bones. This neoplasm may be clinically silent for years without any symptoms. It is usually diagnosed when it becomes enlarged and is incidentally observed during a radiological examination. The radiographic characteristic of the lesion is a well circumscribed round or oval radiopaque mass. In this paper, we present a case of an unusual localization of a peripheral osteoma incidentally detected during radiographic examination with subsequent three-dimensional computed tomography evaluation.

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Section: Discussioncontrasting

confidence: 48%

Section: Discussionmentioning

confidence: 99%

An unusual peripheral osteoma of the mandibular notch: a case report with computed tomography evaluation

et al. 2011

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“…With the widespread introduction of imaging devices, the incidental diagnosis of smaller and asymptomatic vestibular schwannomas has increased (Lin et al 2005). We experienced a case of IAC osteoma misdiagnosed as IAC schwannoma (Estrem et al 1993;Davis et al 2000), but the CISS sequence has not been reported to present potential pitfalls in the diagnosis of IAC lesions without CT. Our experience with the present case indicates several important points as follows: T1-weighted MR imaging with Gd is still essential in some cases to establish the correct diagnosis of IAC lesions; and the CISS sequence is useful for the detection of small IAC lesions in patients for whom contrast material is contraindicated, but consecutive CT should be performed to rule out bony tumors if an IAC lesion is detected. The treatment of IAC osteomas remains controversial.…”

Section: Discussionmentioning

confidence: 95%

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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“…Three out of 17 cases of osteoma and 3 out of 4 cases of exostoses were bilateral in nature (Table 2) [2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17]. Symptomatic patients presented at average age of 50 with an average symptom duration of 6.4 years.…”

Section: Discussionmentioning

confidence: 99%