Dermatology Service, Veterinary Specialists Emergency Centre, Saitama, Japan.
Diagnostic Iimaging Service, Veterinary Specialists Emergency Centre, Saitama, Japan.
Vet Med Sci. 2022 Sep;8(5):1862-1866. doi: 10.1002/vms3.845. Epub 2022 May 20.
In humans, aural polyps comprise fibrovascular tissue covered by the respiratory epithelium. Aural polyps with ciliated epithelium are common in cats but are rarely reported in dogs. In a previous case, a mass filled the tympanic cavity alone, and it was surgically removed.
To report a case of a canine aural polyp with ciliated epithelium extending from the dorsal tympanic cavity to the external auditory canal with detailed otological features and to demonstrate the usefulness of the transcanal endoscopic procedure (TEP) with a diode laser as a less-invasive therapy.
A 12-year-old castrated male Cavalier King Charles Spaniel presented with a 6-month history of unilateral chronic otorrhoea. Video-otoscope examination revealed a protruding, reddish and soft-to-rubbery round mass in the right horizontal ear canal. Computed tomography and magnetic resonance imaging further revealed a smooth mass extending from the dorsal portion of the tympanic cavity into the horizontal part of the external auditory canal. However, it showed no lesions in the dorsal tympanic cavity.
The mass was removed using aural forceps by a traction-torsion manoeuvre. The suspected base of the mass on the caudal side of the upper tympanic cavity was confirmed by a rigid scope, and it was completely vaporised with a diode laser. Histopathology revealed foci of columnar ciliated epithelium embedded in the connective tissue encapsulated by stratified squamous epithelium. No recurrence was observed at 3 years and 8 months.
We describe a rare case of an aural polyp with ciliated epithelium extending from the upper-middle ear to the external auditory canal in a dog. The TEP using a diode laser may be a useful minimally invasive treatment option for managing external auditory canal polyps.
在人类中，耳息肉由覆盖在呼吸上皮上的纤维血管组织构成。具有纤毛上皮的耳息肉在猫中很常见，但在狗中很少见。在之前的一个病例中，一个肿块仅填满鼓室，手术切除。
报告一例具有纤毛上皮的犬耳息肉，其从鼓室背侧延伸至外耳道，详细描述耳科学特征，并展示使用二极管激光经耳道内镜手术（TEP）作为一种微创治疗方法的实用性。
一只 12 岁已去势雄性可卡犬出现单侧慢性耳漏 6 个月。视频耳镜检查显示右水平耳道内有一个突出的、红色的、柔软有弹性的圆形肿块。计算机断层扫描和磁共振成像进一步显示一个光滑的肿块从鼓室背侧延伸至外耳道的水平部分。然而，鼓室背侧没有病变。
使用耳钳通过牵引扭转手法切除肿块。使用硬性内镜确认了上鼓室后侧肿块的可疑根部，并使用二极管激光将其完全汽化。组织病理学显示柱状纤毛上皮嵌入被复层鳞状上皮包裹的结缔组织中。3 年 8 个月后未见复发。
我们描述了一例罕见的犬耳息肉，其纤毛上皮从中耳上部延伸至外耳道。使用二极管激光的 TEP 可能是一种有用的微创治疗外耳道息肉的选择。
