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홍종철,이재훈,나서희,박헌수 대한이비인후과학회 2010 대한이비인후과학회지 두경부외과학 Vol.53 No.7
Primary Ewing sarcoma (ES) arising in the head and neck region is extremely rare, comprising only 1-4% of all cases of ES. ES is much more common in children and white populations,and has a slightly male predominance. About a quarter of patients have detectable metastases at diagnosis. The lung is the most common site for metastases (50%), followed by bone (25%)and bone marrow (20%). We report a case of 27-year-old woman who presented with cervical Ewing sarcoma with lung metastasis and was treated with surgery and chemotherapy. Korean J Otorhinolaryngol-Head Neck Surg 2010;53:441-3
후두미세수술 전후의 성대 용종 및 결절 환자의 음성분석
홍종철,이강대,김우성,장애란,김경아,권순복,Hong, Jong-Chul,Lee, Kang-Dae,Kim, Woo-Sung,Jang, Ae-Lan,Kim, Kyung-A,Kwon, Soon-Bok 대한후두음성언어의학회 2009 대한후두음성언어의학회지 Vol.20 No.1
Background and Objectives : Vocal polyps and nodules are representative chronic benign laryngeal disease. Treatment options for vocal polyp and nodule in general include voice therapy or laryngeal microsurgery. The purpose of this study was to analyze voice results before and after laryngeal microsurgery. Materials and Method: Vocal polyp and vocal nodule patients were treated by laryngeal microsurgery from March 2004 to December 2006 at Kosin University Hospital. All were women. Voice analysis studies were done before and after laryngeal microsurgery. Five measurements were performed: MPT, Fo, jitter, shimmer and NHR. Results: There was significant improvement in the vocal polyp patients regarding MPT, jitter, shimmer and NHR. Also there was significant improvement in the vocal nodule patients regarding MPT, jitter and shimmer. Conclusion: MPT, jitter, shimmer and NHR will be effective acoustic parameters in documenting the quantitative changes in the vocal polyp patients. MPT, jitter and shimmer will be effective acoustic parameters in documenting the quantitative changes in the vocal nodule patients before and after laryngeal microsurgery.
홍종철,이형신<SUP>1<.SUP>,김성원<SUP>2<.SUP>,이강대<SUP>2<.SUP>,Jong-Chul Hong,Hyoung-Shin Lee,M.D.<SUP>1<.SUP>,Sung- Won Kim,M.D.<SUP>2<.SUP> and Kang-Dae Lee,M.D.<SUP>2<.SUP> 대한갑상선-내분비외과학회 2011 The Koreran journal of Endocrine Surgery Vol.11 No.3
Purpose: Vocal symptoms have been reported after thyroidectomy and even in the absence of injury to the recurrent laryngeal nerve or the external branch of the superior laryngeal nerve. The aim of this prospective study was to evaluate the subjective and objective voice changes in patients without laryngeal nerve injury after thyroidectomy. Methods: The subjects had undergone total thyroidectomy for differentiated thyroid carcinoma from November 2007 to December 2008. Twenty-eight subjects (males: 8, females: 20) were selected for this study. Voice analysis was prospectively evaluated in the subjects at the time of preoperation and postoperation (10.8 months for the males and 11.7 months for the females). A subjective analysis was done using the visual analogue scale (VAS, 0: no symptom, 10: severe symptoms) and objective analyses were determined by several parameters such as the fundamental frequency (Fo), jitter, shimmer and the noise to harmonic ratio (NHR) using the multi-dimensional voice program. Maximum phonation time (MPT)was performed as an aerodynamic test. Results: 3 patients (37.5%) among the males and 14 patients (70%) among the females had subjective postoperative voice change. The VAS showed a significant difference for the females (0 to 1.25±0.97, P<0.001), whereas no changes were shown for the males (0 to 0.88±1.25, P>0.05). The vocal parameters (Fo, jitter, shimmer, NHR) and MPT showed no significant changes for both the males and females (P>0.05). Conclusion: Subjective voice changes may occur after thyroidectomy without laryngeal nerve injury. Surgeons should take possible voice changes into consideration when informing patients before thyroidectomy. (Korean J Endocrine Surg 2011;11:175-178)
약품활성화와 가스활성화에 대한 왕겨로부터 활성탄의 제조
홍종철,김명수 명지대학교 대학원 1998 대학원논문집 Vol.2 No.-
A series of activated carbons was prepared from rice hulls by both chemical activation with KOH and physical activation with steam and carbon dioxide. The effect of process variables such as carbonization, activation temperature, and chemical ratio on the pore structure and activation yield of the carbons was studied. When the char produced by the carbonization of the rice hulls in a stream of nitrogen at 700 ℃ was well mixed with a concentrated solution of potassium hydroxide at a KOH:char ratio of 4:1 and then the mixture was activated for 3 hours in a stream of nitrogen, high-quality activated carbons with high surface area, high pore volume, and well-developed pore structure could be prepared. The surface area and micropore volume of the chemically activated carbon were 2∼3 times higher than those obtained by physical activation.
홍종철,정승현,홍숙희,강명구 대한이비인후과학회 부산,울산,경남 지부회 2011 임상이비인후과 Vol.22 No.2
Eosinophilic otitis media (EOM) is a newly recognized intractable middle ear disease, characterised by the accumulation of eosinophils in middle ear effusion and middle ear mucosa. Since EOM patients show gradual or sudden deterioration of hearing, it is important to properly diagnose EOM and to start adequate treatment for EOM. We experienced a case of EOM, so discuss the clinical features, pathogenesis, and management of EOM. EOM is often complicated by rhinosinusitis (eosinophilic sinusitis). High-tone loss is more frequently found and more severe in EOM patients than in chronic otitis media control patients, and EOM patients sometimes become deaf suddenly. Systemic or topical steroid administration is the most effective treatment for patients with EOM. The instillation of prednisolone, a suspension of steroids, into the middle ear is very effective for controlling eosinophilic inflammation in our case. It is very important to explain to patients with EOM that the disease may last for a long period and that progressive and sudden hearing loss may occur.
홍종철,이동근,정승현,강명구 대한이비인후과학회 부산,울산,경남 지부회 2011 임상이비인후과 Vol.22 No.1
Chondroid syringoma, or mixed tumor of the skin, is a benign neoplasm of sweat gland origin that occurs most frequently in the head and neck. The most common sites are the nose, cheek, upper lip, scalp, forehead, and chin. The tumor typically presents as a slowly growing, painless intradermal or subcutaneous nodule in patients between the ages of 20 and 60 years. In the head and neck it occurs twice as commonly in males as in females, but no predilection for sex is observed when it develops at other sites because of a rare possibility of malignant transformation. Total surgical excision remains the best therapeutic option to avoid tumor recurrence and close follow-up observation is recommended. We report a very rare case of chondroid syringoma accompanied by cholesteatoma in a 49-year-old man who presented as a external auditory canal mass with a brief review of literatures.