A Case of Intraductal Papilloma in the Parotid Gland / 대한이비인후과학회지

Intraductal papilloma is a rare benign salivary gland tumor that occurs most commonly in the minor salivary gland. We recently experienced a case of intraductal papilloma arising from the parotid gland in a 24-year-old woman. Radiologic imaging shows a well-circumscribed unicystic mass in the right parotid gland. Superficial parotidectomy was performed. Micoscopically, the mass has papillary epithelial proliferation within the dilated lumen of the salivary duct. We report this case with a brief review of literature.

Expression Patterns of Injected Adenovirus in the Nasal Cavity and Paranasal Sinus Mucosa of the Rat / 대한이비인후과학회지

BACKGROUND AND OBJECTIVES: A potential use of gene therapy to deliver therapeutic peptides to the nasal mucosa has not been investigated. The purpose of this study was to assess the feasibility of using a recombinant adenovirus vector to target the nasal cavity and paranasal sinus mucosa of the rat. MATERIALS AND METHOD: Ten male Sprague Dawley rats were used in this experiments, and adenovirus vectors containing green fluorescent protein (GFP) were injected into rat via tail vein. On fourteen days after gene transfer, 10 rats were sacrificed. The turbinate, nasal septum and paranasal sinus mucosa were examined by fluorescent microscope, and immunohistochemical analysis using anti-GFP antibody was performed. RESULTS: The turbinate and septal mucosa after injection of adenovirus vector expressing GFP showed diffused distribution of fluorescent produced by GFP. Immunohistochemical analysis showed that GFP expression in the turbinate mucosa was localized to the largely ciliated colmnar epithelium and to some lamnina propria, and that in the septal mucosa, it was localized to the ciliated columnar epithelium. Expression in the turbinate mucosa was more obvious than that in the nasal septal mucosa. There was no expression in the paranasal sinus mucosa. CONCLUSION: This study suggests that recombinant adenovirus vectors can be used to transfer genes to turbinate and nasal septal mucosa. Gene therapy targeting mucosal epithelium can be a helpful method to treat patients with chronic inflammatory disease of the nasal mucosa such as allergic rhinitis or neoplasm of the nasal cavity.

Clinical Consideration of Vestibular Evoked Myogenic Potential in Dizzy Patients

BACKGROUND AND OBJECTIVES: Vestibular evoked myogenic potential (VEMP) is a relatively new diagnostic tool that is in the process of being investigated in patients with specific vestibular disorders. In this study, we examed the responses of VEMP in patients who complained of dizzines. MATERIALS AND METHOD: Eighty-six patients with complaint of dizziness and ten normal volunteers are included in this study. Among these patients, forty-six patients were diagnosed as unilateral vestibulopathy (A), five patients were bilateral vestibulopathy (B), nine patients were sudden sensorineural hearing loss with vertigo (C), fifteen patients were benign paroxysmal positional vertigo (D) and eleven patients were Meniere's disease (E). We compared VEMP parameters in each group. RESULTS: In each group, abnormal response in VEMP was 33%(A), 0%(B), 11%(C), 12%(D) and 36%(E) respectively. and there was no absent VEMP formation, and there was no abscent VEMP formation. CONCLUSION: VEMP is a promising method for diagnosing and following patients with many vestibular disorders.

Hypermethylation of TIG1 in Head and Neck Cancer / 대한이비인후과학회지

BACKGROUND AND OBJECTIVES: Decreased expression and growth suppression of Tazarotene-Induced Gene 1 (TIG1) were reported in prostate cancer. In this study, we examined the possibility of TIG1 transcriptional silencing by hypermethylation in head and neck cancer. SUBJECTS AND METHOD: We extracted DNA and total RNA from five head and neck cell lines (O11, O12, O19, O22 and O28), and three prostate cell lines (PC3, LNCap and DU145). We checked the methylation status of TIG1 by methylation-specific PCR (MSP) and RT-PCR. We also examined primary cancer tissues of 32 head and neck cancer, 31 prostate cancer and 10 normal samples. RESULTS: We found that all of five head and neck (100%) cell lines and two of three prostate (66.7%) cell lines were methylated. RT-PCR analysis confirmed the absence of TIG1 expression in six cell lines with methylation. We checked primary cancer by MSP and found TIG1 methylation in 16 of 32 (50%) head and neck cancers, and 17 of 31 (54.8%) prostate cancers. Normal head and neck and prostate tissues were free of methylation. CONCLUSION: Our results support the notion that methylation might be an important mechanism of TIG1 inactivation and a target event in head and neck cancer.

Clinical Evaluations of Sinonasal Infection in the Patients with Hematopoietic Stem Cell Transplantation / 대한이비인후과학회지

BACKGROUND AND OBJECTIVES: As a result of increasing the use of hematopoietic stem cell transplantation (HSCT) for hematologic malignancies and certain solid tumors, more patients have become susceptible to infection. Sinonasal infections in patients with HSCT frequently cause problems which are sometimes fatal. The purpose of this study is to determine the clinical features of sinonasal infections in the immunocompromised patients who received HSCT and to suggest a proper evaluation of these patients. MATERIALS AND METHOD: We reviewed retrospectively 1814 patients who had received HSCT in St. Mary's hospital from August 1995 to May 2003 to determine the clinical features of sinonasal infections in these patients and to analyze the correlation between sinonasal infection of pre- and post-HSCT. RESULTS: 403 patients (22.2%) had sinonasal infections. The infection occurred before HSCT in 206 patients (11.3%), whereas it occurred after HSCT in 197 patients (10.8%). Of 197 patients (27.4%) 54 had previously sinonasal infections. CONCLUSION: Sinonasal infection in the patients of pre-HSCT increased incidence of post-HSCT sinonasal infection. Early detection using endoscopic examination and sinus computed tomography scan as well as employing an aggressive combined treatment of medical and surgical modalities are essential for the treatment of sinonasal infections in the HSCT patients.