Prediction of Location of the Parotid Tumors that Cross Over Anatomical Criteria for Facial Nerve on Computed Tomography / 대한이비인후과학회지

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, cut-off value was obtained after receiver operator curve analysis. The location of tumor was predicted by using the cut-off 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 cut-off 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 cut-off 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 cut-off value obtained by measurement of deep portion of tumor can be applied to improve the diagnostic performance for the prediction of tumor location.

Prediction of Location of the Parotid Tumors that Cross Over Anatomical Criteria for Facial Nerve on Computed Tomography / 대한이비인후과학회지

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, cut-off value was obtained after receiver operator curve analysis. The location of tumor was predicted by using the cut-off 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 cut-off 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 cut-off 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 cut-off value obtained by measurement of deep portion of tumor can be applied to improve the diagnostic performance for the prediction of tumor location.

Expert's Consensus on Terminology of Auditory Perceptual Assessment in Voice Disorder / 대한이비인후과학회지

BACKGROUND AND OBJECTIVES: The purpose of this study was to conduct a preliminary study to develop a standardized guideline for terminology necessary to describe auditory perception qualitatively and quantitatively in voice disorders in the Korean language. SUBJECTS AND METHOD: At first, a subjective questionnaire for Korean translation and definition of 25 auditory perceptual assessment terms proposed by Titze was answered by six speech-language pathologists. Secondly, a new questionnaire that was reconstructed with objective items based on the responses to the first questionnaire was completed by 14 experts who had experience on voice disorder for more than 10 years in Korea. In both questionnaires, the necessity of 32 auditory perceptual assessment terms selected from the 25 terms defined by Titze, GRBAS and CAPE-V was surveyed. RESULTS: The consensus on the Korean translation of auditory perceptual assessment terms was moderate (52.6%) between experts. The terms ‘ rough’ and ‘ shimmer’ demonstrated highest consensus of 85.7%. The consensus on Korean definition of auditory perceptual assessment terms was also moderate (61.6%). The term ‘ yawny’ showed complete consensus (100%). The necessity of auditory perceptual assessment terms varied with terms, but showed high consensus. CONCLUSION: It is necessary to develop and apply various standardized vocabulary terms for clinical evaluation so that they can express pathology and physiological characteristics during vocalization. In addition, despite the fact that there are a lot of auditory-perceptual terms, there is a lack of knowledge about voice quality terms, suggesting the need to promote and educate the developed voice quality terms.

Tactile Sensation Recovery after Parotidectomy / 대한이비인후과학회지

BACKGROUND AND OBJECTIVES: One of the common complications after parotidectomy is a decrease in skin sensation around the parotid gland. This is known to be associated with damage to the great auricular nerve (GAN). The purpose of this study was to investigate the pattern of tactile sensory recovery after parotidectomy and the difference in sensory recovery according to the preservation or sacrifice of the GAN. SUBJECTS AND METHOD: Fifty-two patients who underwent parotidectomy were enrolled in this study. The Touch Test Sensory Evaluator was used to measure the minimum tactile threshold value at 6 sites around the auricle before surgery and at 1 week, 1, 3, 6 and 12 months after surgery. RESULTS: The tactile threshold was the highest at 1 month after parotidectomy in all 6 sites. After 1 month, the threshold value gradually decreased until 12 months after surgery. However, the threshold was not completely recovered to the preoperative threshold level. At least one branch and the main trunk of GAN were preserved in 39 patients; one of GAN branches was preserved but the main trunk of GAN was partially injured in 3 patients, and the main trunk of GAN was completely injured in 10 patients. The tactile sensory recovery showed no significant differences in relation to the GAN status. CONCLUSION: The tactile sensory value kept decreasing up to one month following parotidectomy and then gradually recovered. However, the tactile sensory did not recover completely even one year after surgery. The GAN preservation did not affect tactile sensory recovery.