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B16 악성흑색종세포에서 vimentin intermediate filament의 운동 특성
윤경한 ( Kyeong Han Yoon ),하서은 ( Sea Win Ha ),강희영 ( Hee Young Kang ),이은소 ( Eun So Lee ),강원형 ( Won Hyoung Kang ) 대한피부과학회 2003 大韓皮膚科學會誌 Vol.41 No.3
Background:Intermediate filaments as well as microtubule and microfilament are major components of cytoskeleton of human cells. Melanocytes have vimentin intermediate filament, which have not been well investigated as other cytoskeletons, especially in th
임신성 포진의 자가항체 특성을 보이는 수포성 유천포창 2예
윤경한 ( Kyeong Han Yoon ),윤미라 ( Mi Ra Yoon ),이일주 ( Il Joo Lee ),김수찬 ( Soo Chan Kim ) 대한피부과학회 1998 대한피부과학회지 Vol.36 No.3
Bullous pemphigoid(BP) and herpes gestationis(HG) are subepidermal bullous diseases which show clinical and immunological similarities. Both diseases show immune deposits along the basement membrane zone and their autoantibodies bind a common antigenic site within the non-collagenous stretch of the 180 kDa BPAG2 ectodomain. Besides its association with pregnancy, HG has some characteristic features that distinguish it from BP. The serum of patients with HG often contains an IgG that avidly fixes complement, and showes IgG1 subclass predominance. We report here two cases of non-pregnant young women presenting clinical and histological features of bullous pemphigoid or herpes gestationis. The immunopathology, IgG subtyping and immunoblotting studies showed that the autoantibodies in the patients were the characteristic ones of herpes gestationis. The patients might be a subtype of BP that have characteristics of autoantibodies of HG patients. (Korean J Dermatol 1998;36(3): 451-455)
나환자 피부생검 조직에서 중합효소 연쇄반응을 이용한 나균의 검출
윤경한 ( Kyeong Han Yoon ),조상래 ( Sang Nae Cho ),( Gerald P . Walsh ),이정복 ( Jung Bok Lee ),김주덕 ( Joo Deuk Kim ) 대한피부과학회 1994 大韓皮膚科學會誌 Vol.32 No.3
Background : Polymerase chain reaction(PCR) has brought an oppotunity for rapid detection of Mycobacterium leprae in clinical pecimens for the diagnosis of leprosy. Th DNA segment specific to M. leprae was detectable in a matteir of hours and DNA from one orgnisa appeared positive by PCR. However, the PCR tool has not been evaluated using elinical specimeriis from leprosy patients and controls. Onjective 8 Methods : The primers amplifying 372bp segment of rebetitive sequence of M. leprae DNA were used in PCR. Skin biopsy specimens from 102 leprosy patient, and controls were examined for the presence of M. leprae by PCR and the results were aomared with microscopic and histopathologic findings. Results : 1. As a result, of PCR after DNA preparation of M. leprae, six other mycobacteria, ten other bacteria, and skin from leprosy with five other skin biopsy tissues, 372bp DNA fragment was specifically amplified from M. leprae. 2. Dot blot, hybridization of PCR products showed that the 372bp DNA from skin biopsy specimens were derived from M. leprae. 3. As a result of PCR after DNA preparation of 10-fold diluted M. legrae from mouse footpad, PCR gave a positive result as low as one organism. 4. Of 87 specimens in which acid-fast bacilli were found under microcopic examinations 97% had positive PCR results. 5. Of 97 specimens which hadihistopathologic evidences of leprosy 95% had positive PCR results. 6. Of 15 specimens in which acid-fast bacilli were not found under n!icroscopic examinations 73% had positive PCR results. In three of five cases which had neither histopathologic nor microscopic evidences of leprosy had positive PCR results. Conclusion : PCR method amplifying 372bp fragment of repetitive seqi,ence was highly sensitive and specific in detecting M. leprae DNA in skin biopsy specimens, thus may be a useful tool as an additive diagnostic method, espcially for cases where microscopic antihystopathologic findings are not definite. (Kor J Dermatol 1994; 32(3): 409-415)
윤경한 ( Kyeong Han Yoon ),김동건 ( Dong Kun Kim ) 대한피부과학회 1996 대한피부과학회지 Vol.34 No.3
Pachydermodactyly is a rare form of digital fibromatosis mostly affecting young men. It is characterized by asymptomatic, protracted, bulbous soft tissue swellings on proximal phalangeal and proximal interphalangeal joint areas of fingers. Histopathologic findings represent hyperkeratosis, acanthosis, and thickening of the dermis due to increased collagen bundles. There is also mucin deposition in the dermis. Intralesional infection of steriods is helpful in relieving the skin lesions. We report a case of pacgydermodactyly manifested as soft tissue swellings unilaterally on the lateral aspects of fingers. The lesions showed a good response to triamcinolone intralesional infections. (Kor J Dermatol 1996;34(3) : 459 ~ 462)
윤경한 ( Kyeong Han Yoon ),장성남 ( Sung Nam Chang ),김수찬 ( Soo Chan Kim ),전수일 ( Soo Il Chun ) 대한피부과학회 1996 대한피부과학회지 Vol.34 No.6
Acquired progressive lymphangioma is a benign lymphatic proliferation characterized clinically by gradually enlarging erythematous patches and histopathologically by dermal vascular channels with dissection of collagen;ppearance. A 30-year-old woman presented a 6x4cm sized, erythematous patch on the right thigh, which had been gradually enlarging for 10 years since she had had a burn injury on the same site. Histopathologic findints of the lesion showed vascutar channels forming a network in the dermis with a dissection of collagen appearance. The cells lining the channels were stained with antibodies against muscle actin, factor VIII-related antigen, Ulex europaeus agglutinin I, CD34, and CD31. We made a diagnosis of acquired progressive lymphangioma and have been observing the course of the disease without specific treatment. {Kor J Dermatol 1996;34(6): 1026-1029}
김대환 ( Dae Hwan Kim ),윤경한 ( Kyeong Han Yoon ) 대한피부과학회 2002 대한피부과학회지 Vol.40 No.4
Primary cutaneous plasmacytoma is a rare cutaneous B cell lymphoma characterized by monoclonal proliferation of mature plasma cells in the skin without systemic involvement. Although a significant proportion of patients, especially with multiple lesions, went on to develop systemic disease with a poor prognosis. the abnormal clone of plasma cells may arise in the skin and never progress to multiple myeloma involving the bone manow in number of patients. We report a case of primary cutaneous plasmacytoma and review dam published in the literature. A 19-year-old man developed multiple 0.2 to 0.5an sized erythematous grouped papules on his posterior neck for 4 years. Histopathologic examination represented superficial and deep interstitial and nodular dense infiltration of plasma cells showing monoclonal expression of immunoglobulin lambda light chain. F-I8 FDG concidence PET(CoDe-PET) scan and serum electrophoresis were within normal limit. Any systemic disease has not developed for 6 months after diagnosis.
수부습진 환자와 정상인의 표피지질 조성 및 각질층 손상후 회복
이승헌 ( Seung Hun Lee ),윤경한 ( Kyeong Han Yoon ),황미선 ( Mi Sun Whang ) 대한피부과학회 1995 大韓皮膚科學會誌 Vol.33 No.6
Background : In eczematous skin it is expected that altered defense mechanisms are employed against an injury, which mechanisms include alterations in the stratum corneum barrier function and lipid contents. Objective : To investigaten aspect of pathophysiology of hand eczema by comparing the water holding capacities and transepidermal water loss(TEWL) after injuries on the skin and by comparing the epidermal lipid contents between hand eczema and normal subjects. Methods : The water holding capacities were checked by corneometer, and the TEWL were checked after epidermal barrie! destruction with acetone or adhesive tapes. The epidermal lipids were extracted with acetone, ther (1: 1 v/v) mixture solvent and analysed by HP- TLC. Results : The water holdingapacities were decreased in eczema of the palm, but the recoveries of TEWL and the lipid content did not differ between hand eczema and normal subjects. Conclusion : The water holding capacities were decreased in the eczematous skin. But there were no significant differencies in the recovery of destructed epidermal barrier and the epidermal lipid contents. (Kor J Dermatol 1995;33(6): 1053-1059)
김이선 ( Yi Sun Kim ),윤경한 ( Kyeong Han Yoon ),최현주 ( Hyun Joo Choi ),이일주 ( Il Joo Lee ) 대한피부과학회 1998 대한피부과학회지 Vol.36 No.5
Pilomattiaoma, aften called calcifying epithelioma of Malherbe, is a benign tumor originating from the outer root sheath cell of the hair follicle and extending into the hair matrix, Pilomatricoma usually occurs as a single, asymptomatic dermal or subcutaneous nodule. Multiple lesions are quite unueuel, comprising only 2-3.5% of cases. We report two patients with multiple pilomatricoma. (Korea J Dermatal 1998, 36(3): 950-952)