Computed Tomography Features of External Auditory Canal Cholesteatoma: A Pictorial Review

Chawla, Ashish; Bosco, Jerome Irai Ezhil; Lim, Tze Chwan; Shenoy, Jagadish; Krishnan, Vijay

doi:10.1067/j.cpradiol.2015.05.001

Cited by 18 publications

(15 citation statements)

References 12 publications

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“…HRCT is indicated in patients with suspected congenital malformation of the external and middle ear, and preoperative planning is absolutely necessary 3 18 . The analysis was more accurate using MIMICS software 19 .…”

Section: Discussionmentioning

confidence: 99%

“…It has been suggested that normal epithelial migration from the tympanic membrane and EAC is an essential phenomenon to maintain the cleanliness of the outer ear. Predisposing factors, such as bony external ear irregularities and local inflammation, prevent or slow the normal migration of the squamous cells in the external ear canal, leading to a build-up of keratin debris, ultimately forming a cholesteatoma 18 23 24 . Males not only had a higher rate of cholesteatoma formation but also a higher rate of postoperative complications.…”

Section: Discussionmentioning

confidence: 99%

“…With respect to measuring the EAC diameter, an analytical method was used. Sagittal scans were used to measure the diameter of EAC on MIMICS; sagittal reconstruction is the most useful image for defining the involvement of anterior, posterior, and inferior walls by the EAC cholesteatoma 18 . Only bony segments were measured, reflecting actual CAS conditions, with or without cholesteatoma.…”

Section: Methodsmentioning

confidence: 99%

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Congenital Aural Stenosis: Clinical Features and Long-term Outcomes

Ying

Chen

et al. 2016

Sci Rep

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The aim of the present study was to comprehensively evaluate the clinical features and long-term outcomes of congenital aural stenosis (CAS). This study presents a retrospective review of patients who underwent meatoplasty for CAS at a tertiary referral hospital from 2008 to 2015. A total of 246 meatoplasty procedures were performed on 232 patients in the present study. We performed multivariate regression analysis. Except in the age < 6 years group, no significant difference was observed among different age groups for cholesteatoma formation, p > 0.05. Except for the stenosis of the external auditory canal (EAC) (>4 mm) group, the other stenosis of EAC groups were not associated with cholesteatoma formation, p > 0.05. Postoperative air-bone gaps (ABG) less than 30 dB occurred in 77.3% (99/128) of the patients, and the Jahrsdoerfer score was associated with postoperative ABG, p < 0.001. The complication rate of CAS was 13.8% (20/144), and males showed a higher risk for postoperative complications (OR, 6.563; 95% CI, 1.268–33.966, p = 0.025). These results indicate that meatoplasty was an effective surgical intervention for CAS, showing a stable hearing outcome with prolonged follow-up. There was no significant difference between the cholesteatoma and no cholesteatoma groups for hearing outcomes, p > 0.05.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

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Congenital Aural Stenosis: Clinical Features and Long-term Outcomes

Ying

Chen

et al. 2016

Sci Rep

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“…[ 2 ] The erosion is particularly seen at the sulcus or at the bony-cartilaginous junction of EAC. [ 6 ] The osteolysis may extend to the anterior or more commonly the posterior wall of EAC, and sagittal reformations depict this circumferential affliction to an advantage. [ 6 ] Bony fragments appear as foci of hyperdensities within the soft tissue plug.…”

Section: Discussionmentioning

confidence: 99%

“…[ 6 ] The osteolysis may extend to the anterior or more commonly the posterior wall of EAC, and sagittal reformations depict this circumferential affliction to an advantage. [ 6 ] Bony fragments appear as foci of hyperdensities within the soft tissue plug. [ 6 ] A narrow window width may enhance visualization of tiny bony fragments.…”

Section: Discussionmentioning

confidence: 99%

Spontaneous external auditory canal cholesteatoma in a young male: Imaging findings and differential diagnoses

Aswani

Varma

Achuthan

2016

Indian Journal of Radiology and Imaging

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A cholesteatoma is a non-neoplastic lesion of the petrous temporal bone commonly described as “skin in the wrong place.” It typically arises within the middle ear cavity, may drain externally via tympanic membrane (mural type), or may originate in the external auditory canal (EAC). The latter type is rarely encountered and typically affects the elderly. EAC cholesteatoma poses diagnostic challenges because it has numerous differential diagnoses. The present case describes a 19-year-old male who presented with gradually progressive diminution of hearing in a previously naïve right ear since 8 months. A soft tissue attenuation lesion confined to the right EAC with erosion of the canal on computed tomography prompted magnetic resonance imaging (MRI). The lesion showed restricted diffusion on MRI. Thus, a diagnosis of spontaneous EAC cholesteatoma was established. The case elucidates the rarity of spontaneous EAC cholesteatoma in a young male. In addition, it describes the role of imaging to detect, delineate the extent, and characterize lesions of petrous temporal bone. The case also discusses common differential diagnoses of EAC cholesteatoma, as well as the importance of diffusion weighted imaging in EAC cholesteatoma similar to its middle ear counterpart.

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A case of cholesteatoma in a medieval Hispano‐Mudejar population (13th–14th centuries ad)

Dorado

Aso

Sebastián³

et al. 2021

Intl J of Osteoarchaeology

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The case presented includes a left temporal bone from an individual exhumed from the Hispano‐Mudejar necropolis in Uceda (Guadalajara, Spain) dated between the 13th and 14th centuries bc. External examination and computed tomography images show lesions in the external acoustic canal, in the form of diffuse widening, suggestive of a cholesteatoma originating in this canal, with invasion of the middle ear through the tympanic membrane. The difficulties with examining the internal elements of the ear are discussed, which causes the underestimation of these diseases in paleopathology studies.

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Computed Tomography Features of External Auditory Canal Cholesteatoma: A Pictorial Review

Cited by 18 publications

References 12 publications

Congenital Aural Stenosis: Clinical Features and Long-term Outcomes

Congenital Aural Stenosis: Clinical Features and Long-term Outcomes

Spontaneous external auditory canal cholesteatoma in a young male: Imaging findings and differential diagnoses

A case of cholesteatoma in a medieval Hispano‐Mudejar population (13th–14th centuries ad)

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