Background and Objectives To find more accurate way to determine the location of parotid tumors that cross anatomical criteria for the facial nerve (FN). Subjects and Method Two hundred patients were included in the study and retrospectively studied. Five anatomical criteria were used to predict the location of parotid tumors on computed tomography (CT). Deep portion of tumors was measured and then, cutoff value was obtained after receiver operator curve analysis. The location of tumor was predicted by using the cutoff value and by the conventional way, in which the side where most of the tumor is located is determined as the tumor site. Results The parotid tumors were located in superficial lobes in 148 cases, and in deep lobes in 52 cases by operative record. The tumors that cross the anatomical criteria were defined as 'crossing tumor.' The cutoff values for prediction of 'crossing tumor' location on CT were 6.7 mm for anatomical line, 6.4 mm for FN line, 11.2 mm for retromandibular vein, 4.9 mm for Utrecht line and 3.8 mm for Conn's arc. The accuracy of 5 anatomical criteria for 'crossing tumor' was between 55.9% and 81.6% when the cutoff value was used, whereas the accuracy was between 25.7% and 68.9% when conventional way was used. Conclusion In cases of 'crossing tumor,' the cutoff value obtained by measurement of deep portion of tumor can be applied to improve the diagnostic performance for the prediction of tumor location.
Background and Objectives: Magnetic resonance imaging is commonly used in neurologic examination of intracranial problems. Incidental abnormalities in the sinonasal area without clinical symptoms have been reported in about 38% of patients. Subjects and Method:The aim of this study was to evaluate the clinical characteristics of sinonasal surgical patients transferred from neurologists. Two hundred two patients were enrolled and divided into two groups. Group I patients had been directly transferred from the Neurology Department within 1 month after neurologic evaluation. Group II patients directly visited the Rhinology Department without a neurologic evaluation within the prior year. Both groups had received sinonasal endoscopic surgery or septal surgery. Clinical characteristics, pathologic findings, and surgical results were compared between groups. Results: Headache and dizziness were common symptoms in group I. Group II patients displayed more severe sinus involvement with nasal symptoms. Fungal ball was the main pathologic finding in group I. Nasal polyps were common in group II. Most patients had improved symptoms after sinonasal surgery. Conclusion: Patients transferred from the Neurology Department had different clinicopathologic characteristics than patients without neurologic problems who had first been evaluated at the Rhinology Department.
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