Tympanic Orifice Of Eustachian Tube Research Articles

A Structural Analysis of Tympanic Compartments of the Middle Ear in Patients With Down's Syndrome: A Temporal Bone Study.

Otitis media with effusion is a highly prevalent condition with DS. Knowledge of the volume of the tympanic compartments and the area of the tympanic isthmus might be important to find out the pathogenesis of highly prevalent otitis media with effusion in those patients. We compared the volume of the epitympanum, mesotympanum, and the areas of the tympanic isthmus and tympanic orifice of eustachian tube in temporal bones from patients with DS. We also investigated the eustachian tube histopathologically. The mean volume of the epitympanum and the mesotympanum was significantly smaller in the DS group than the control group. We found no significant difference in the mean diameter of the protympanic opening and tympanic orifice between the two groups. The mean narrowest area of the aerated and bony tympanic isthmus also was not significantly different between the two groups. An immature development of eustachian tube and cartilage was seen. We found mesenchyme remaining at the epitympanum and/or mesotympanum in all specimens in the DS group, and in five specimens in the control group. In the presence of the small middle ear, poorly developed eustachian tube, and tensor muscle, a vicious circle occurs, making otitis media with effusion difficult to resolve.

Temporal Bone Study of the Internal Carotid Artery at the Tympanic Orifice of Eustachian Tube

Temporal Bone Study of the Internal Carotid Artery at the Tympanic Orifice of Eustachian Tube

A Case of Inverted Papilloma Originating from the Middle Ear

Inverted papilloma (Schneiderian-type papilloma) involving the middle ear is extremely rare. Most of cases originate from the mucosa of the lateral nasal wall, extending into the paranasal sinuses and orbits. Inverted papilloma involving the middle ear has a high recurrence rate and a possibility of malignant change. We experienced a case of inverted papilloma of the middle ear secondary to congenital cholesteatoma surgery. A nine-year old male who was diagnosed with congenital cholesteatoma was treated with intact canal wall tympanomastoidectomy. Nine months later, he underwent a second look operation. In the second surgery, a 3 mm round pinkish mass which was located at the tympanic orifice of Eustachian tube was identified as inverted papilloma. There was no recurrence of cholesteatoma or inverted papilloma four months after the 2 nd operation. Korean J Otorhinolaryngol-Head Neck Surg 2009;52:781-3 Key WordsZZInverted papilloma·Middle ear·Cholesteatoma.

Possible Role of Helicobacter pylori in the Etiopathogenesis of Chronic Otitis Media

To investigate a possible contribution from Helicobacter pylori to the etiopathogenesis of chronic otitis media. Prospective clinical trial. Tympanomastoidectomy, radical mastoidectomy, and modified radical mastoidectomy procedures were performed according to the pathology of ear disease. Biopsy specimens were taken from middle ear, mastoid antrum, and tympanic orifice of eustachian tube. Helicobacter pylori DNA was extracted from these biopsy specimens by using nested polymerase chain reaction. Helicobacter pylori DNA was detected in 3 (7.9%) of 38 chronic otitis media patients. Even though it is possible to detect Helicobacter pylori in middle ear cleft in chronic otitis media, its role in the etiopathogenesis of the issue is controversial.