What factors can cause conductive deafness?
(1) Papilloma of the external auditory canal: The etiology is unknown. It is generally believed to be related to papilloma virus infection. It is a benign tumor of the cartilage skin of the external auditory canal and is the most common benign tumor of the ear.
Middle ear cancer: This is a relatively rare malignant tumor in the clinic. It can originate in the middle ear or invade the middle ear from a tumor in the external auditory canal, nasopharyngeal or parotid gland.Squamous cell carcinoma is the most common, with a prevalence age of 40-60 years. Most patients have a history of chronic suppurative otitis media.
Ossicular chain injury: Ossicular chain injury is a variety of violence acting on the outer ear, middle ear and head, resulting in structural damage or dysfunction of the ossicular chain.The position of the ossicular chain is deep, so there is not much chance of injury alone.Ossicular chain injuries mostly occur at the same time as severe external auditory canal injuries or temporal bone fractures, and a few can be caused by blast injuries and slap injuries.