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( Hyok Bu Kwon ),( Yun Seok Choi ),( Joon Ho Lee ),( Sang Yun Jin ),( Beom Joon Kim ),( Seung Ho Lee ),( Ai Young Lee ) 대한피부과학회 2011 Annals of Dermatology Vol.23 No.1S
Verrucous carcinoma is an unusual, non-metastasizing, distinct variant of squamous cell carcinoma composed of four subtypes according to the site of occurrence: oral type, anogenital type, plantar type, and other cutaneous sites. Oral type verrucous carcinoma usually shows slow progression with a low incidence of metastases. Treatment of verrcous carcinoma is challenging; multiple medical and surgical therapies are often attempted, with limited success. We reported on 2 cases of verrucous carcinoma of the lip treated with topical imiquimod and debulking therapy. (Ann Dermatol 23(S1) S68~S71, 2011)
Case Reports : Papular Elastorrhexis: A Case and Differential Diagnosis
( Yun Seok Choi ),( Sang Yun Jin ),( Joon Ho Lee ),( Hyok Bu Kwon ),( Ai Young Lee ),( Seung Ho Lee ) 대한피부과학회 2011 Annals of Dermatology Vol.23 No.1S
Papular elastorrhexis is a rare cutaneous disorder that occurs predominantly during adolescence. The disorder is characterized by asymptomatic indurated white or flesh papules showing decreased and fragmented elastic fibers in the dermis. We herein report on a 12-year-old girl with multiple asymptomatic white, nonfollicular, firm papules scattered on the extremities and trunk. Histological examination revealed focal areas showing increased layers of collagen fibers and decreased and fragmented elastic fibers in the upper dermis. (Ann Dermatol 23(S1) S53~S56, 2011)
Hyok Bu Kwon,Yunseok Choi,Joon Ho Lee,Sang Yun Jin,Beom Joon Kim,Seung Ho Lee,이애영 대한피부과학회 2011 Annals of Dermatology Vol.23 No.-
Verrucous carcinoma is an unusual, non-metastasizing,distinct variant of squamous cell carcinoma composed of four subtypes according to the site of occurrence: oral type,anogenital type, plantar type, and other cutaneous sites. Oral type verrucous carcinoma usually shows slow progression with a low incidence of metastases. Treatment of verrcous carcinoma is challenging; multiple medical and surgical therapies are often attempted, with limited success. We reported on 2 cases of verrucous carcinoma of the lip treated with topical imiquimod and debulking therapy. (Ann Dermatol 23(S1) S68∼S71, 2011)
[구조강도부문] 고무차륜형 AGT 주행장치의 구조 및 피로해석
권혁수(Hyok-Soo Kwon),유형선(Hyeong-Seon Yoo),윤성호(Seong-Ho Yun) 한국자동차공학회 1999 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
Two representative types of the AGT (Automated Guideway Transit) system are avaiJable for the side-guided system. bogie type and steering type. Each system primarily consists of the bogie frame. suspensions. wheel sets and axles. braking system and transmission system. Among these components. the bogie frame is one of the most significant components subjected to the whole vehicle and passenger loads. This paper describes structural analyses and associated fatigue analyses for each bogie frame depending on the various loading<br/> conditions on a basis of the railway vehicle code UIC 515-4. Subsequent]y. comparisons are made between those two types to estimate which type is more reliable in terms of strength and fatigue<br/> It is observed that the bogie type is a little advantageous over the steering one from the strength analysis. However. the two types are found to be in a reliable range of fatigue even though a realistic fatigue load case is further carried out. In addition. an optimal size of thickness is suggested for designs of the bogie frame.
권혁부 ( Hyok Bu Kwon ),이준호 ( Joon Ho Lee ),최윤석 ( Yun Seok Choi ),이애영 ( Ai Young Lee ),이승호 ( Seung Ho Lee ) 大韓皮膚科學會 2009 대한피부과학회지 Vol.47 No.9
Hidradenoma papilliferum is a benign, cystic, papillary tumor that occurs almost exclusively in women on the skin of the anogenital region and this is usually a slow-growing cystic dermal mass that can be either asymptomatic or it can ulcerate and bleed, and it represents an adenoma with apocrine differentiation. Nonanogenital (ectopic) hidradenoma papilliferum is rare. We present here a case of hidradenoma papilliferum in a 52-year old male with an erythematous to brownish nodule on the left cheek and the lesion had the typical histopathological findings of hidradenoma papilliferum. (Korean J Dermatol 2009;47(9):1080∼1082)
권혁부 ( Hyok Bu Kwon ),이준호 ( Joon Ho Lee ),최윤석 ( Yun Seok Choi ),이애영 ( Ai Young Lee ),이승호 ( Seung Ho Lee ),최종순 ( Jong Sun Choi ) 대한피부과학회 2009 대한피부과학회지 Vol.47 No.5
Pancreatic endocrine tumors (PET) are rare neoplasms of the pancreas and account for less than 5% of all primary pancreatic malignancies. Included in this group are insulinomas, gastrinomas, glucagonomas and somatostatinomas. Collectively, these neoplasms are classified as functional PETs. When a PET is not associated with a clinical syndrome due to hormone oversecretion, it is referred to as a non-functional PET. Non-functional PETs are pancreatic tumors with endocrine differentiation but lack a clinical syndrome of hormone hypersecretion. Although a pancreatic carcinoma shows aggressive biological behavior, a cutaneous metastasis from a pancreas carcinoma is rare. We report a case of a case of a cutaneous metastasis from an endocrine pancreatic carcinoma in a 50-year-old female that clinically manifested as a painful firm nodule on the back. (Korean J Dermatol 2009;47(5):592~595)
최윤석 ( Yun Seok Choi ),이준호 ( Joon Ho Lee ),권혁부 ( Hyok Bu Kwon ),이애영 ( Ai Young Lee ),이승호 ( Seung Ho Lee ),최종순 ( Jong Sun Choi ) 대한피부과학회 2010 大韓皮膚科學會誌 Vol.48 No.3
Clear cell syringoma has two distinct features from typical syringomas: histological predominance of clear cells and a correlation with diabetes mellitus. Otherwise it is similar to ordinary syringomas in age, sex, site, and clinical manifestations. We here report a 49-year-old male with clear cell syringoma accompanied with diabetes mellitus. Histological examination revealed numerous, variable-sized, well-defined tumor nests composed largely of clear cells that stained positive with PAS (Periodic Acid Schiff) before diastase digestion and negative after diastase digestion. (Korean J Dermatol 2010;48(3):246~249)