Auditory Canal

External auditory canal cholesteatoma

July 5, 2012     Joseph A. Ursick, MD; Derald E. Brackmann, MD
article

External auditory canal cholesteatomas, which result from the deposition of squamous epithelium deep to the skin of the external canal, can be caused by postsurgical implantation, radiation, or trauma.

Skull base plasmacytoma with conductive hearing loss and an external auditory canal mass

July 5, 2012     Andrew I. Ahn, MD; Mary K. Wren, MD; Ted A. Meyer, MD, PhD
article

Abstract

Skull base plasmacytomas are rare and difficult to differentiate clinically and radiologically from other tumors of the head and neck. Because of the risk of progression to multiple myeloma, early diagnosis is essential. We report the case of a 65-year-old woman who presented with left-sided conductive hearing loss and an external auditory canal mass. The tumor was removed along with much of the tympanic membrane, and it was found to be a plasmacytoma. The patient was subsequently diagnosed with multiple myeloma and treated with chemoradiation before being lost to follow-up.

Mycoplasma an unlikely cause of bullous myringitis

June 4, 2012     Lisa Cramer, BA; Dina M. Emara, MBBCh; Arun K. Gadre, MD, FACS
article

Despite common belief, Mycoplasma pneumoniae is an extremely rare causative agent for bullous myringitis. Instead, it is caused by the same organisms responsible for acute otitis media.

Otomycosis in immunocompetent and immunocompromised patients: Comparative study and literature review

March 1, 2012     Borlingegowda Viswanatha, MS, DLO, Dadarao Sumatha, MBBS, and Maliyappanahalli Siddappa Vijayashree, MBBS, MS
article

Abstract

A comparative clinical study was carried out that included 50 cases of otomycosis in immunocompetent patients and 50 cases of otomycosis in immunocompromised patients. Clinical presentation, predisposing factors, mycologic profile, and treatment outcomes were compared. Aspergillus spp were the most commonly isolated fungi in the immunocompetent group, and Candida albicans in the immunocompromised group. Bilateral involvement was more common in the immunocompromised group. All the patients were treated with topical clotrimazole ear drops. Four patients in the immunocompromised group did not respond to treatment with clotrimazole but were treated successfully with fluconazole ear drops. Three patients had a small tympanic membrane perforation due to otomycosis.

Osteoma of the external auditory canal

March 1, 2012     Andrew J. Ebelhar, BS and Arun K. Gadre, MD, FACS
article

Single osteomas can be removed surgically via one of two routes, depending on their location. Those arising lateral to the isthmus of the external auditory canal can be removed under local anesthesia using a transmeatal approach; those arising medial to the isthmus should be removed under general anesthesia using a postauricular approach.

Folliculosebaceous cystic hamartoma of the external auditory canal in an adult

February 18, 2012     Fabiana Pirani Carneiro, MD, Leonora Maciel de Souza Vianna, MD, Aline Marques dos Santos, MD, Igor Teixeira Raymundo, MD, and Ana Emília Borges de Azevedo, MD
article

Abstract

Folliculosebaceous cystic hamartoma (FSCH) is a cutaneous hamartoma of pilosebaceous origin that usually occurs on the face. We present what we believe is only the second reported case of FSCH of the external auditory canal, and the first in an adult. The patient was a 59-year-old woman who presented with a 4-year history of a firm nodule on the left external auditory canal that had caused hearing loss, pruritus, and pain. The lesion was excised, and histopathologic examination identified infundibular cysts, hyperplasia of the sebaceous lobules, and a large amount of mucin, features that are consistent with FSCH. One year postoperatively, the patient was asymptomatic, and no evidence of recurrence was noted.

External auditory canal cholesteatoma and keratosis obturans: The role of imaging in preventing facial nerve injury

December 15, 2011     Edward D. McCoul, MD, MPH and Matthew B. Hanson, MD
article

Abstract

We conducted a retrospective study to compare the clinical characteristics of external auditory canal cholesteatoma (EACC) with those of a similar entity, keratosis obturans (KO). We also sought to identify those aspects of each disease that may lead to complications. We identified 6 patients in each group. Imaging studies were reviewed for evidence of bony erosion and the proximity of disease to vital structures. All 6 patients in the EACC group had their diagnosis confirmed by computed tomography (CT), which demonstrated widening of the bony external auditory canal; 4 of these patients had critical erosion of bone adjacent to the facial nerve. Of the 6 patients with KO, only 2 had undergone CT, and neither exhibited any significant bony erosion or expansion; 1 of them developed osteomyelitis of the temporal bone and adjacent temporomandibular joint. Another patient manifested KO as part of a dermatophytid reaction. The essential component of treatment in all cases of EACC was microscopic debridement of the ear canal. We conclude that EACC may produce significant erosion of bone with exposure of vital structures, including the facial nerve. Because of the clinical similarity of EACC to KO, misdiagnosis is possible. Temporal bone imaging should be obtained prior to attempts at debridement of suspected EACC. Increased awareness of these uncommon conditions is warranted to prompt appropriate investigation and prevent iatrogenic complications such as facial nerve injury.

Seborrheic keratosis of the external auditory canal

October 26, 2011     Wan-Ling Ho, MD and Kai-Chieh Chan, MD
article

Meningioma mimicking vestibular schwannoma

July 13, 2011     Sung Won Chae, MD and Moo Kyun Park, MD
article

Spontaneous posterior wall external canal cholesteatoma

July 13, 2011     Luca Oscar Redaelli de Zinis, MD
article

Type 1 first branchial cleft anomaly: Duplication of the external auditory canal

July 13, 2011     Matthew L. Carlson, MD, David J. Archibald, MD, and Shelagh A. Cofer, MD
article

Otomyiasis of the mastoid cavity: An unusual complication of cotton-swab use

June 13, 2011     Chaudhary F. Riaz, BSc, BM, MRCS, DOHNS, Owen Judd, MRCP, MRCS, DCH, and Peter J. Conboy, FRCS
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