Learning Objectives: Recent studies on the mastoid structure and function has pointed to an important role in middle ear physiology. The normal function of the middle ear depends on regulation of its pressure relative to ambient pressure, and traditionally gas exchange between the middle ear mucosa and gas pocket has been focused on together with the function of the Eustachian tube. However, re...

Acute otitis media in children is very common with an estimated incidence of 85 % within the first year of life. Children usually present with fever, ear fullness, ear discharge and conductive hearing loss. The most common etiologies of acute otitis media in children are Streptococcus pneumoniae, Haemophilus influenzae, and Moraxella catarrhalis. The diagnosis is based on clinical examination a...

Objectives: The aim of this study was to compare the otitis media with effusion (OME) groups that improved when treated with adenoidectomy and Ventilation Tube (VT), to the group of the recurred after surgery and detect the possible role of allergy in OME. Material and Methods: This study was performed on two groups. The Patient group consisted of 38 patients with recurrent OME with allergy an...

introduction: first branchial cleft anomalies manifest with duplication of the external auditory canal.   case report: this report features a rare case of microtia and congenital middle ear and canal cholesteatoma with first branchial fistula. external auditory canal stenosis was complicated by middle ear and external canal cholesteatoma, but branchial fistula, opening in the zygomatic root and...

In an animal model, we examined the extratympanic electrocochleographic response to static pressure changes (middle-ear pressure and intracranial pressure [ICP]) with attention to the summating potential (SP), action potential (AP), and the SP/AP ratio. With a closed middle ear, raised or lowered middle-ear pressure and raised or lowered ICP resulted in congruent increases of the SP and the SP/...

Salivary gland choristoma of the middle ear cavity is a very rare condition. These lesions are a result of a defective embryonic development and their adjacent structures may be associated with abnormalities. Here we report a case of salivary gland choristoma of the middle ear who presented to Be’sat Hospital, Tehran, Iran in 2015 with unilateral conductive hearing loss. There are 41 case repor...

Acute otitis media in children is very common with an estimated incidence of 85 % within the first year of life. Children usually present with fever, ear fullness, ear discharge and conductive hearing loss. The most common etiologies of acute otitis media in children are Streptococcus pneumoniae, Haemophilus influenzae, and Moraxella catarrhalis. The diagnosis is based on clinical examination a...