8/8/2023 0 Comments External auditory![]() ![]() Idiopathic, inflammatory, medial meatal, fibrotising otitis presenting with lichen planus. Postinflammatory acquired atresia of the external auditory canal: late results of surgery. Other causes include: healing problems, fibrosis after surgery, radiotherapy, trauma, dermatologic conditions, neoplasm, or idiopathic. Recurrent inflammation leads to accumulation of fibrotic scar tissue and lateral extension of this fibrotic plug toward the cartilaginous junction in the external auditory canal (EAC). Laryngoscope 1998 108(06):903-907 It is usually caused by recurrent infections or inflammation with formation of granulation tissue. Postinflammatory acquired atresia of the external auditory canal: treatment and results of surgery over 27 years. Using the appropriate surgical technique, including skin-grafting and regular postoperative check-up, rendered excellent results regarding otorrhea and a moderate improvement of hearing was achieved in 65% of the patients after two years.Įar canal disease management treatment outcome hearing loss adultĪcquired atresia of the external auditory canal is a rare condition in which the medial part of the ear canal is blocked by a fibrotic plug. Treatment of acquired atresia remains a challenge. We observed a statistically significant improvement of hearing in 63% of the patients at six months (p = 0.005) and in 65% after two years (p = 0.022). The pure tone average before surgery was 39.1 dBHL (SD = 20 dBHL), at six months 31.4 dBHL (SD = 16.4 dBHL), and at 24 months postop 30.9 dBHL (SD = 17.1 dBHL). A dry and patent ear canal was obtained in 55.6% after six months and in 89% of the patients after two years (n = 27). Otorrhea was present in 59.3% of the patients initially and in 14.8% at six months and 11% at two years postoperative. When necessary, we combined this with a myringoplasty and a (meato-) canalplasty. In total, 27 ears underwent treatment with resection of the fibrotic plug followed by transplantation of a split-thickness skin graft covering the bare bone and tympanic membrane. We conducted this retrospective study at a tertiary referral center. We analyzed the results of surgery after six months and two years by checking (1) pre- and postoperative hearing thresholds (2) presence of otorrhea and (3) whether a dry and patent ear canal is achieved. Acquired atresia presents with hearing loss and can be associated with otorrhea. The causes include chronic otitis externa, perforated chronic otitis media, postoperative or idiopathic healing problems. Acquired atresia of the external auditory canal is characterized by the formation of fibrous tissue in themedial part. ![]()
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