Abstract：
OBJECTIVE: To report a common site of external ear canal erosion in multiple pathologies, located inferiorly at 6 o\'clock.
METHODS: Otology patients who came in 2023 for treatment of external auditory canal erosions.
METHODS: This clinical capsule is an observational report of the external canal\'s propensity to erosion at the 6 o\'clock location. Patient treatments were canalplasty, mastoidectomy, and medical management.
METHODS: Documentation of the propensity to erosion at the 6 o\'clock location in the external auditory canal. Locations of the niduses of prior series of external auditory canal pathologies are documented.
RESULTS: Eight patients are presented with external auditory canal erosion in 10 ears originating at the 6 o\'clock position medial to the bony-cartilaginous junction. No other patient with spontaneous canal erosion presented with their nidus of pathology in another canal location. (A review of 42 case series of 291 patients found that keratosis obturans and bisphosphonate-induced osteonecrosis tended to arise from the same 6 o\'clock lateral bony canal location, while 26% of necrotizing otitis externa cases arose there.).
CONCLUSIONS: The \"6 o\'clock spot\" in the external canal is a common location of canal erosion for spontaneous wax and keratin collections and may be the precursor to keratosis obturans, bisphosphonate-induced osteonecrosis of the ear canal, and necrotizing otitis externa.
METHODS: Otology patients who came in 2023 for treatment of external auditory canal erosions.
METHODS: This clinical capsule is an observational report of the external canal\'s propensity to erosion at the 6 o\'clock location. Patient treatments were canalplasty, mastoidectomy, and medical management.
METHODS: Documentation of the propensity to erosion at the 6 o\'clock location in the external auditory canal. Locations of the niduses of prior series of external auditory canal pathologies are documented.
RESULTS: Eight patients are presented with external auditory canal erosion in 10 ears originating at the 6 o\'clock position medial to the bony-cartilaginous junction. No other patient with spontaneous canal erosion presented with their nidus of pathology in another canal location. (A review of 42 case series of 291 patients found that keratosis obturans and bisphosphonate-induced osteonecrosis tended to arise from the same 6 o\'clock lateral bony canal location, while 26% of necrotizing otitis externa cases arose there.).
CONCLUSIONS: The \"6 o\'clock spot\" in the external canal is a common location of canal erosion for spontaneous wax and keratin collections and may be the precursor to keratosis obturans, bisphosphonate-induced osteonecrosis of the ear canal, and necrotizing otitis externa.
摘要：
目的：报告多种病理中外耳道侵蚀的常见部位，位于地下6点。
方法：2023年来治疗外耳道糜烂的耳科患者。
方法：本临床胶囊是对6点位置外管侵蚀倾向的观察性报告。病人的治疗是泪管成形术，乳突切除术,和医疗管理。
方法：记录外耳道6点位置的侵蚀倾向。记录了先前一系列外耳道病变的鼻孔位置。
结果：8例患者出现10耳外耳道侵蚀，起源于骨-软骨交界处内侧的6点位置。没有其他自发性管糜烂的患者在另一个管位置出现病理表现。（对42例291例患者的回顾发现，闭塞性角化病和双膦酸盐引起的骨坏死往往来自相同的6点钟外侧骨管位置，而26％的坏死性外耳炎病例出现在那里。).
结论：外管中的“6点”是自发蜡和角蛋白集合的管侵蚀的常见位置，可能是闭塞角化病的前兆，双膦酸盐诱导的耳道骨坏死，和坏死性外耳道炎.
方法：2023年来治疗外耳道糜烂的耳科患者。
方法：本临床胶囊是对6点位置外管侵蚀倾向的观察性报告。病人的治疗是泪管成形术，乳突切除术,和医疗管理。
方法：记录外耳道6点位置的侵蚀倾向。记录了先前一系列外耳道病变的鼻孔位置。
结果：8例患者出现10耳外耳道侵蚀，起源于骨-软骨交界处内侧的6点位置。没有其他自发性管糜烂的患者在另一个管位置出现病理表现。（对42例291例患者的回顾发现，闭塞性角化病和双膦酸盐引起的骨坏死往往来自相同的6点钟外侧骨管位置，而26％的坏死性外耳炎病例出现在那里。).
结论：外管中的“6点”是自发蜡和角蛋白集合的管侵蚀的常见位置，可能是闭塞角化病的前兆，双膦酸盐诱导的耳道骨坏死，和坏死性外耳道炎.
