No abstract available.
Mastoid*

52 types of os temporale had been studied to determine antrum walls on the outside size, from face aditus to ampullae lateral semicircular canals size, antrum ceilling size, from antrum below walls to sigmoid sinus size; antrum radius:on- below, in-out of and before-behind. The understanding of anatomy detail of antrum and its interrelationship will help to avoid the misfortune surgery
Anatomy ; Mastoid

No abstract available.
Aspergillosis* ; Mastoid*

No abstract available.
Dust* ; Mastoid*

No abstract available.
Dust* ; Mastoid*

95% cases of otitis mastoid were sucessfully treated by the reservation and surgery and the rest 5% cases with this were treated by many different methods aiming to management of the hollows of the radical surgery of mastoid bone according to the cause or individuals. The recovering of the partly poor epithelization in the surgical hollow reported effectively. 13 patients received a surgery in the Central Military Hospital 108 during 1987-1996 were studied. The indicators of age, gender, symptoms before receiving operation and status of the surgical hollow were used to classify the result
Mastoid ; Petrous Bone ; surgery

No abstract available.
Mastoid* ; Transverse Sinuses*

BACKGROUND AND OBJECTIVES: Attic cholesteatoma which develops from the papillary or retracted from progresses through various anatomic sites such as the mesotympanium, the mastoid process and the epitympanium. Although the most common site for attic cholesteatoma is the lateral attic space, it has also been found frequently in the medial attic space. We hoped to understand the pathogenesis of attic cholesteatoma through clinical analyses in order to contribute to the cholesteatoma treatment. MATERIALS AND METHODS: We chose 60 attic cholesteatoma patients showing attic retraction or perforation. These cases of attic cholesteatomas were classified into either the lateral or the medial types depedning on the main site of occurence. They were further classified into anterior, posterior and inferior types according to the direction of cholesteatomatic progression. CONCLUSION: The accurate assessment and clear understanding of the pathogenesis of different forms of cholesteatoma enabled a successful operation and helped to minimize the operative field.
Cholesteatoma* ; Hope ; Humans ; Mastoid

PURPOSE: To compare the enhancement pattern of normal facial nerves on 3D-FLAIR and 3D-T1-FFE-F) sequences at 3.0 T MR units. MATERIALS AND METHODS: We assessed 20 consecutive subjects without a history of facial nerve abnormalities who underwent temporal bone MRI with contrast enhancement between January 2008 and March 2009. Two neuroradiologists independently reviewed pre-/post-enhanced 3D-T1-FFE-FS and 3D-FLAIR images respectively with 2-week interval to assess the enhancement of normal facial nerves divided into five anatomical segments. The degree of enhancement in each segment was graded as none, mild or strong, and the results of 3D-FLAIR and 3D-T1-FFE-FS image sets were compared. RESULTS: On 3D-FLAIR images, one of the two reviewers observed mild enhancement of the genu segment in two (10%) subjects. On 3D-T1-FFE-FS images, at least one segment of the facial nerve was enhanced in 13 (65%) subjects. At least one reviewer found that 17 of the 100 segments showed enhancement on 3D-T1-FFE-FS images, with the mastoid segment being the most commonly enhanced. Interobserver agreement on 3D-T1-FFE-FS images was good for enhancement of the normal facial nerve (kappa= 0.589). CONCLUSION: In contrast to 3D-T1-FFE-FS, normal facial nerve segments rarely showed enhancement on 3D-FLAIR images.
Facial Nerve ; Mastoid ; Temporal Bone

The main two problems in the standard transpetrosal approach are a cosmetic deformity and the cerebrospinal fluid (CSF) leakage. However, until now a few technical innovations has been introduced to overcome these problems. Domestically, there is no reports concerning this technique. We introduce a simple and easy technique of cosmetic reconstruction with a split-thickness mastoid bone flap after transpetrosal approach in three tumorous conditions at cerebellopontine region. This simple technique provides a superior cosmetic result, a significant reduction in uncomfortable symptoms, and a possibility of the CSF leakage.
Cerebrospinal Fluid ; Congenital Abnormalities ; Mastoid