![]() ![]() The method of choice in diagnosis is temporal bone CT scan. In most cases, they are discovered accidentally during otoscopic or radiographic examination. Histopathological findings confirmed osteoma.ĭue to their slow growth, the rate of auditory canal osteomas develop asymptomatically for a long time without the characteristic clinical features. The removed bone change was about 12 mm high, 13-14 mm deep and about 8 mm wide. A 2013 case report estimates that these tumors account for only 5 percent of cancers of the external auditory canal (the passageway from the outside of the head to the eardrum). We applied surgical therapy by retroauricular approach. The clinical diagnosis was confirmed by CT scan of the temporal bone. It was discovered accidentally, during otoscopic examination. In our patient, the osteoma arose in the auditory canal, the most frequent localization it was unilateral, solitary, multilobular and compact. The report presents the case of a 70-year old patient with the osteoma of the right external auditory canal. The tympanic membrane divides the external ear from the middle ear. Tympanic membrane (also called the eardrum). This is the tube that connects the outer ear to the inside or middle ear. The progress of the disease is prolonged, as they are slow growing, asymptomatic and benign tumours. External or outer ear, consisting of: Pinna or auricle. In terms of differential diagnosis, they must be distinguished from exostoses, bone tissue proliferation and osteoid osteomata. It functions to capture and direct sound waves towards the external acoustic meatus. Fig 1 Overview of the ear Auricle The auricle is a paired structure found on either side of the head. The auricle is a paired structure found on either side of the head. The louder the sound the bigger the vibration, the lower pitch the sound the slower the vibration. This sound then reaches the tympanic membrane, and causes it to vibrate. Diagnosis is made based on case history, clinical examination, audiological processing and radiography (temporal bone CT scan), and confirmed by histopathological examination of the bone. The external ear can be divided functionally and structurally into two parts the auricle (or pinna), and the external acoustic meatus which ends at the tympanic membrane. The external ear/pinna funnels sound waves into a unidirectional wave, and is able to direct it into the auditory canal. The symptoms of intracanalicular osteomas are the result of auditory canal obstruction. By bone composition they are divided into spongious (osteoma spongiosum) and compact osteomas (osteoma eburnum) by growth direction, into outward-growing (exosteoma) and in inward-growing (endosteoma) into unilateral and bilateral by size, into small and gigantic by surface structure, into smooth and multilobular by number, into solitary and multiple into symmetrical and asymmetrical. They develop in the external auditory canal on squamous sections, in the mastoid, middle and inner ear. Osteomas are a slow growing benign neoplasm of unknown etiology very rarely involving the temporal bone. ![]()
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