The ear has outer, middle, and inner portions. Appropriate patients should be referred to an otolaryngologist. The ear canal, or auditory canal, is a tube that runs from the outer ear to the eardrum. Susceptible patients should be educated to avoid manipulation of the ear canal (i.e., they should not use cotton swabs to clean their ears) and to minimize exposure of the ear canal to water with a high chloride concentration. Family physicians and others who provide medical care for immunocompromised patients should be alert to the possibility of necrotizing external otitis in patients who complain of otalgia, particularly if they have diabetes mellitus and external otitis that has been refractory to standard therapy.
1, 2 Changes can be local, however more diffuse involvement may affect even the inner ear or exhibit intracranial extension. Treatment includes correction of immunosuppression (when possible), local treatment of the auditory canal, long-term systemic antibiotic therapy and, in selected patients, surgery. Introduction Causes of middle ear and mastoid opacification encompass a clinically, radiologically, and histopathologically heterogeneous group of inflammatory, neoplastic, vascular, fibro-osseous, and traumatic changes. Imaging studies may include computed tomographic scanning, technetium Tc 99m medronate bone scanning, and gallium citrate Ga 67 scintigraphy. Diagnosis requires culture of ear secretions and pathologic examination of granulation tissue from the infection site. Computed tomography (CT) temporal bone demonstrated soft tissue density in the left EAC. Facial and other cranial nerve palsies indicate a poor prognosis intracranial complications are the most frequent cause of death. The patient was having moderate conductive hearing loss on audiometry. Clinical findings include granulation tissue in the external auditory canal, especially at the bone-cartilage junction. Patients with necrotizing external otitis complain of severe otalgia that worsens at night, and otorrhea. Results: The surgical management is described.
Left external auditory canal series#
It is characterized by facial nerve paralysis and sensorineural hearing. This paper describes a 10-year personal case series of external auditory canal lesions with chart, imaging and histopathology review.
The most frequent pathogen is Pseudomonas aeruginosa. Ramsay Hunt syndrome, more accurately known as herpes zoster oticus, is caused by varicella-zoster virus (VZV) infection. It occurs primarily in immunocompromised persons, especially older persons with diabetes mellitus, and is often initiated by self-inflicted or iatrogenic trauma to the external auditory canal. The ear canal (external acoustic meatus, external auditory meatus, EAM) is a pathway running from the outer ear to the middle ear. 1 / 45 Flashcards Learn Test Match Created by Sgarcia324 Terms in this set (45) The auricle is also known as the external auditory canal. Necrotizing (malignant) external otitis, an infection involving the temporal and adjacent bones, is a relatively rare complication of external otitis.
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