The styloid process is a cylindrical, long cartilaginous bone located on the temporal bone. The calcified stylohyoid ligament and elongated styloid process can be identified radiographically, and they are associated with a number of syndromes and symptoms. The exact cause of the styloid process elongation due to calcification and subsequent ossification of ligament is unclear. This report presents a case of severely calcified stylohyoid ligament complex occurred in twins who have the same pattern of calcification.
Humans ; Ligaments ; Ossification, Heterotopic ; Radiography, Panoramic ; Temporal Bone ; Twins

Presbycusis is defined as the natural hearing loss accompanying aging, caused by degenerative changes in the inner ear. The etiology of presbycusis is uncertain. However, it would appear that a complex genetic cause is most likely. The determinants of mastoid size continue to be controversial. One of the pneumatization theories is the hereditary theory. In this study, the possible relationship between presbycusis and the extent of mastoid pneumatization was investigated. This study was carried out on 21 patients with presbycusis and 21 normal subjects of similar ages. The pneumatized volume was measured by computerized tomography. The temporal bone was scanned at 2 mm thickness intervals. Exposure (kV 130, mA105). The scan plane was parallel to the orbitomeatal line and the CT images covered the entire mastoid region. The average mastoid pneumatization in presbycusis group was 6.08 +/- 2.52 cm3 in the right ear and 6.19 +/- 2.93 cm3 in the left ear. However, in the control group it was 4.69 +/- 3.17 cm3 in the right ear (p=0.12) and 5.10 +/- 3.49 cm3 in the left ear (p=0.28). No significant difference was found between the presbycusis patients and normal subjects in terms of the volume of mastoid pneumatization.
Aged ; Hearing Tests ; Human ; Mastoid/*anatomy & histology/radiography ; Middle Aged ; Presbycusis/*etiology/genetics/radiography ; Temporal Bone/anatomy & histology/radiography

High resolution computed tomography (CT) of the middle ear and mastoid, when properly performed and interpreted, is valuable to the otologic surgeon prior to exploration of the cholesteatomatous ear. Fifty one patients with cholesteatomatous otitis media underwent CT examination of both ears one to four weeks prior to surgery. These CT findings were then compared with operation findings. We analysed sixteen parameters of the anatomical and pathological features of the temporal bone affected by cholesteatoma. In conclusion, a high degree of correct correlation was noted between CT findings and those of the operation. Our study showed the usefulness and accuracy of preoperative computed tomographic study in cholesteatomatous otitis media.
Adolescent ; Adult ; Child ; Cholesteatoma/*radiography/surgery ; Human ; Middle Age ; Otitis Media/*radiography/surgery ; Temporal Bone/radiography ; *Tomography, X-Ray Computed

Chondroblastoma is a rare benign bone tumor. It commonly affects the epiphysis of long bones during the second and third decades of life. Chondroblastoma of the temporal bone is extremely rare. We reviewed five cases of chondroblastoma arising in the temporal bone. Four cases were female and one was male. The ages ranged from 41 to 60 years (mean, 53.6 years). All cases involved the temporal bone. Three involved the left side and two the right. Chief complaints were long-standing localized pain and hearing difficulty. A sharply demarcated lobulated mass was the main radiological finding. Microscopic findings were those of chondroblastoma of usual locations. Two cases showed aneurysmal bone cyst-like areas. Immunohistochemical studies for CD34, CD99, S-100 protein and cytokeratin were performed. Tumor cells were diffusely positive for S-100 protein in three cases and weakly positive for cytokeratin in one case. CD34 and CD99 were negative in all cases. In summary, chondroblastoma of the temporal bone is rare and occurs in older age group than reported cases of chondroblastoma of the usual location in the literature.
Adult ; Bone Neoplasms/therapy ; Bone Neoplasms/diagnosis* ; Case Report ; Chondroblastoma/therapy ; Chondroblastoma/diagnosis* ; Female ; Follow-Up Studies ; Human ; Male ; Middle Age ; Temporal Bone/radiography* ; Temporal Bone/pathology*

PURPOSE: This study was performed to determine the prevalence and characteristics of pneumatized articular tubercle or eminence among a defined group of Iranian people. MATERIALS AND METHODS: Digital panoramic radiographs of 1694 patients in the Department of Oral and Maxillofacial Radiology, Hamadan Dental School, Iran were evaluated retrospectively to detect the above lesion. Finally, 1563 radiographs were selected according to inclusion criteria. Then, a review was done of 10 large case series found using a MEDLINE search of the literature. Chi-squared test was used to analyze the differences in variables such as age, gender, laterality, and locularity in our case series. RESULTS: The average age of our samples was 32.6+/-7.63 years. Pneumatized articular tubercle was found in 98 cases, representing a prevalence of 6.2% with a mean age of 22.8+/-7.9 and a range of 8 to 60 years. Sixty-four (65.3%) pneumatized articular tubercles were unilateral, with 30 lesions on the right and 34 on the left side. Bilateral lesions were found in 34 (34.7%) patients. 52 (53.06%) of the pneumatized articular tubercles were of the unilocular type and 46 (46.94%) were multilocular. The results showed no statistically significant differences regarding age (p=0.454), gender (p=0.634), laterality (p=0.252), or locularity (p=0.807) among the samples. CONCLUSION: Among ten large case series from other countries, the prevalence of pneumatized articular tubercle (6.2%) in Iranian patients was higher than that of all eight of the case series that used the same detection method as the present study of panoramic radiography.
Humans ; Iran ; Mastoid ; Methods ; Prevalence* ; Radiography, Panoramic ; Retrospective Studies ; Schools, Dental ; Temporal Bone

PURPOSE: This study was performed to investigate the prevalence, morphology, and calcification pattern of the elongated styloid process in the Mathura population and its relation to gender, age, and mandibular movements. MATERIALS AND METHODS: The study analyzed digital panoramic radiographs of 2,706 adults. The elongated styloid process was classified with the radiographic appearance based on the morphology and calcification pattern. The limits of mandibular protrusion were evaluated for each subject. The data were analyzed by using a Student's t-test and chi-squared test with significance set at p=0.05. RESULTS: Bilateral elongation having an "elongated" type styloid process with a "partially mineralized" pattern was the most frequent type of styloid process. No correlation was found between styloid process type and calcification pattern on the one hand and gender on the other, although elongated styloid was more prevalent in older and male populations (p<0.05). Further styloid process elongation showed no effect on mandibular protrusive movement (p>0.05). CONCLUSION: Dentists should recognize the existence of morphological variation in elongated styloid process or Eagle syndrome apparent on panoramic radiographs. We found higher prevalence of elongated styloid process in the population of the Mathura region when compared with other Indian populations. The calcification of the styloid process was more common in the older age group with no correlation to gender, mandibular movement and site. "Type I" with a "partially calcified" styloid process was observed more frequently in the population studied.
Adult ; Dentists ; Eagles ; Hand ; Humans ; Male ; Ossification, Heterotopic ; Prevalence ; Radiography, Panoramic ; Temporal Bone

Radiographic studies of the temporal bone following head trauma are indicated when there is cerebrospinalfluid otorrhea or rhinorrhea, hearing loss, or facial nerve parlysis. Plain radiography displays only 17–30% oftemporal bone fractures and pluridirectional tomography is both difficult to perform, particularly in the acutelyill patient, and less satisfactory for the demonstration of fine fractures. Consequently, high resolution CT isthe imaging method of choice for the investigation of suspectied temporal bone trauma and allows spacialresolution of fine bony detail comparable to that attainable by conventional tomography. Eight cases of temporalbone trauma examined at Koryo General Hospital April 1985 through May 1986. The results were as follows: Sevenpatients(87%) suffered longitudinal fratures. In 6 patients who had purely conductive hearing loss, CT revealedvariuos ossicular chain abnormality. In one patient who had neurosensory hearing loss, CT demonstrated intractossicles with a fracture nearing lateral wall of the lateral semicircular canal. In one patient who had mixedhearing loss, CT showed complex fracture.
Craniocerebral Trauma ; Facial Nerve ; Fractures, Bone ; Hearing Loss ; Hearing Loss, Conductive ; Hospitals, General ; Humans ; Methods ; Radiography ; Semicircular Canals ; Temporal Bone

Cholesteatoma ; complications ; diagnostic imaging ; Cholesteatoma, Middle Ear ; Humans ; Otitis Media, Suppurative ; complications ; diagnostic imaging ; Radiography ; Temporal Bone ; diagnostic imaging

Jugular bulb diverticulum is an irregular extension of the jugular bulb into the temporal bone that may be symptomatic or asymptomatic. The jugular bulb has rarely been reported to extend into the occipital condyle; such extension is termed a condylar jugular diverticulum and is characterized as a defect in the occipital condyle contiguous with the jugular bulb. This report details 3 cases of condylar jugular diverticulum. Extension of the jugular bulb into the ipsilateral occipital condyle was noted as an incidental finding on cone-beam computed tomographic (CBCT) images of 3 patients. All 3 patients were asymptomatic, and this finding was unrelated to the initial area of interest. CBCT use is becoming ubiquitous in dentistry, as it allows 3-dimensional evaluation, unlike conventional radiography. Proper interpretation of the entire CBCT is essential, and recognition of the indicators of condylar jugular diverticulum may prevent misdiagnosis of this rare entity.
Cone-Beam Computed Tomography ; Dentistry ; Diagnostic Errors ; Diverticulum ; Growth and Development ; Humans ; Incidental Findings ; Jugular Veins ; Radiography ; Temporal Bone

Branchio-oto-dysplasia is characterized by abnormalities of embryonic branchial arch system and deafness inherited as autosomal dominant with variable gene expression. We present a rare case of multiple intracranial aneurysms associated with branchio-oto-dysplasia. A 40-yr-old man with severe headache presented as spontaneous subarachnoid hemorrhage on brain computed tomographic scan. The patient also manifested clinical features of branchio-oto-dysplasia and right hemifacial hypoplasia. Carotid angiogram confirmed an aneurysm in the anterior communicating artery. Intraoperative findings demonstrated multiple aneurysms in the anterior communicating artery and in the left posterior communicating artery, which were clipped successfully. Postoperative course was uneventful. This condition has not been reported previously. We also reviewed literatures to discuss whether the intracranial aneurysm was as a coincidental finding or a part of this malformation.
Adult ; Branchio-Oto-Renal Syndrome/*complications ; Cerebral Angiography ; Human ; Intracranial Aneurysm/*etiology/radiography ; Subarachnoid Hemorrhage/etiology/radiography ; Temporal Bone/abnormalities ; Tomography, X-Ray Computed ; Zygoma/abnormalities