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Soraya Robinson

Publications and source records attributed to Soraya Robinson.

7 recordsLinked to original sources
PubMed2006

Ameloblastic carcinoma of the mandible resembling odontogenic cyst in a panoramic radiograph.

Ameloblastic carcinoma is a rare odontogenic tumor exhibiting histologic evidence of malignancy in the primary or recurrent tumor, regardless of whether it has metastasized or not. Most ameloblastic carcinomas are presumed to have arisen de novo, with few cases of malignant transformation of ameloblastoma being apparent. A case is reported of a 21-year-old caucasian female with ameloblastic carcinoma in the left angulus area of the mandible resembling an odontogenic cyst in the panoramic radiograph. In addition to the panoramic radiograph, computerized tomography (CT) and magnetic resonance (MR) images were taken preoperatively. This report demonstrates that CT or MR examinations may be crucial in differentiating odontogenic tumors from cysts.

Adult↗
PubMed2005

Mu-CT.

While many radiologists are aware of the revolutionary development of computed tomography (CT)-scanners and their diagnostic implications, some researchers have focused on studying the potentials of mu-CT. The aim of this article is to give a brief overview of its physical properties and outline possible indications both for the real ex vivo and small animal mu-CT studies, as well as the modified mu-CT units used in dental practice.

Animals↗
PubMed2005

Correlation between disk morphology on MRI and time curves using electronic axiography.

This retrospective series was intended to determine whether morphological disk findings in open and closed mouth magnetic resonance imaging (MRI) may be correlated with the time curves in axiography. In this series, 45 temporomandibular joints of 33 patients were subjected to a retrospective evaluation. Magnetic resonance images obtained with closed and open mouth and joint movements assessed by electronic axiography were analyzed. Disk morphology in MRI was classified as normal, partly flattened, partly thickened, or completely thickened. For the axiographic tracings, time curves of the free movements of the respective joint were developed and evaluated. Data obtained were analyzed for any potential correlation using scatter plots and discriminance analysis. No correlation between these data was found suggesting that the axiographic time curves do not provide for any conclusions with regard to disk morphology. Apart from patient history and a thorough clinical evaluation, recording of jaw movements, but also using MRI continues to be of particular value in the diagnostic assessment of anterior disk displacement.

Adolescent↗
PubMed2003

Localized pericochlear hypoattenuating foci at temporal-bone thin-section CT in pediatric patients: nonpathologic differential diagnostic entity?

PURPOSE: To evaluate the prevalence of localized hypoattenuating areas in the cochlear otic capsule at temporal-bone thin-section computed tomography (CT) in pediatric patients and correlate the findings with clinical information. MATERIALS AND METHODS: Temporal-bone thin-section CT images obtained in 73 patients aged 0-9 years (20 Austrian, 53 Finnish; 36 female and 37 male patients) were evaluated for the presence of localized hypoattenuating foci in the region of the fissula ante fenestram of the otic capsule. Clinical information collected for all patients was also evaluated. The data were analyzed with a logistic regression model. RESULTS: Hypoattenuating areas in the region of the fissula ante fenestram were observed in 23 of 73 patients (32%). Hypoattenuating foci were substantially more prevalent in patients younger than 3 years than in those 3 years or older (odds ratio, 0.14; 95% CI: 0.04, 0.52; P =.001). The prevalence did not differ between sexes or according to clinical diagnosis. Only three of the 23 patients with hypoattenuating foci had clinical findings suggestive of otosclerosis, and none had osteogenesis imperfecta. After adjustment for age and sex, the finding was more prevalent among the Finnish patients (odds ratio, 5.4; 95% CI: 1.19, 24.52; P =.02) than among the Austrian patients. CONCLUSION: Hypoattenuating areas in the region of the fissula ante fenestram in the otic capsule at thin-section CT are prevalent among children younger than 3 years in the absence of clinical evidence of otosclerosis or osteogenesis imperfecta and appear in children up to 9 years old.

Child↗
PubMed2003

Clinical significance of incidental magnetic resonance image abnormalities in mastoid cavity and middle ear in children.

OBJECTIVE: Magnetic resonance imaging of the head may reveal incidental findings in paranasal sinuses. The purpose of this study was to discover whether similar changes could be identified in the mastoid cavity and middle ear as well. METHODS: A group of 50 children undergoing magnetic resonance imaging of the head for suspected intracranial pathology were prospectively gathered. Their parents completed a questionnaire concerning each child's medical history connected with acute otitis media. Otoradiologists evaluated the pictures for mastoid cavity and middle ear and paranasal sinus abnormalities. RESULTS: In six (12%) children, magnetic resonance imaging detected abnormalities resembling acute inflammatory changes, although none had had acute otitis media during the preceding last 3 months. Abnormalities detected in the paranasal sinuses were not correlated with abnormalities in the mastoid cavity and middle ear. CONCLUSIONS: High signal intensity in magnetic resonance images from the mastoid cavity and middle ear may be incidental and without any clinical significance. These findings must be interpreted together with knowledge of the child's medical condition and clinical examination of the ears.

Acoustic Impedance Tests↗
PubMed2002

Dental CT evaluation of mandibular first premolar root configurations and canal variations.

OBJECTIVES: Routine dental CT scans were used to describe mandibular first premolar root configurations and canal variations. STUDY DESIGN: One hundred twenty dental CT examinations were evaluated for mandibular first premolar root configurations and canal variations regarding shape of root and root canal, incidence of multiple canals, and level of bifurcation. RESULTS: A total of 17 teeth in 12 patients showed mesial invagination of the root of the mandibular first premolar. One root displayed 3 canals with 3 apical foramina. In 2 teeth, a single canal divided into 2 canals, but merged into 1 apical foramen. One root showing 2 root canals finally divided into 2 roots near the apex. Thirteen roots had 2 canals and 2 apical foramina. The distance from the cementoenamel junction to the level of bifurcation was between 4 and 13 mm (mean, 7.4 mm). CONCLUSION: The occurrence of incidentally found mandibular first premolar root variations should be an important component of dental CT reports.

Bicuspid↗