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. 2023 Dec;75(4):3889-3894.
doi: 10.1007/s12070-023-03941-9. Epub 2023 Jun 14.

Lateral Stenosis of External Auditory Canal Secondary to Corrosive acid Injury: A Rare Case Report and Review of Literature

Sunil Sam Varghese  1 , Navneet Kumar  1 , Rebecca Philipose  1
Affiliations

Lateral Stenosis of External Auditory Canal Secondary to Corrosive acid Injury: A Rare Case Report and Review of Literature

Sunil Sam Varghese et al. Indian J Otolaryngol Head Neck Surg. 2023 Dec.

Abstract

Acquired external auditory canal (EAC) stenosis is an uncommon condition with an incidence of 0.6 in 100,000 population. Road traffic accidents and otology surgeries are the frequently reported causes for it to occur. The high rate of restenosis makes this condition difficult to manage. A 50 year old lady presented with history of accidental instillation of acid in her left ear at 6 months of age by the care giver. The patient developed stenosis of left EAC with hearing loss. Examination revealed pin point stenosis of left EAC. Puretone audiogram revealed a moderately severe conductive hearing loss. Computed tomogram showed soft tissue lesion obliterating the entire EAC and extending into the middle ear and antrum. Intra operatively only the cartilaginous EAC was stenosed. Surgical excision of the fibrotic scar with a tympanomastoidectomy and wide meatoplasty was done. Regular post operative aural toileting, packing with merocele strips and application of topical antibiotic -steroid preparations was done. 6 months post-surgery a patent EAC and healed tympanic membrane was achieved. In this report, we present a rare case of lateral EAC stenosis secondary to corrosive acid injury, highlighting the surgical steps, post operative care and surgical outcomes. A limited review of literature is also presented.

Keywords: Corrosive acid injury; Excision; External auditory canal; Stenosis; Stents; Surgery; Tympanomastoidectomy.

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Conflict of interest statement

Conflict of InterestThe authors have no relevant financial or non-financial interests to disclose.

Figures

Fig. 1
Fig. 1
Pin point stenosis of left EAC
Fig. 2
Fig. 2
HRCT temporal bone revealed complete opacification of bony and cartilaginous EAC.
Fig. 3
Fig. 3
HRCT temporal bone revealed complete soft tissue opacification of middle ear cleft
Fig. 4
Fig. 4
Stenotic lateral cartilaginous segment excised. Cheesy pultaceous debris seen in the bony EAC.
Fig. 5
Fig. 5
Post operative - Granulations at the lateral end of the EAC
Fig. 6
Fig. 6
Patent and healed EAC at 6 months of follow-up
Fig. 7
Fig. 7
healed tympanic membrane at 6 months of follow-up
See this image and copyright information in PMC

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