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수장 . 족저부의 표피낭종 - 임상 및 조직학적 연구 -
한광호,문상은,조광현 ( Kwang Ho Han,Sang Eun Moon,Kwang Hyun Cho ) 대한피부과학회 1997 大韓皮膚科學會誌 Vol.35 No.3
Background: Although palmoplantar epidermal cysts have long been associated with develop ment following implantation of an epidermal fragment as a result of a penetrating or blunt injury, the pathogenic mechanism is still not fully understood. Since 1987, many cases have been reported in which human papillomavirus(HPV) could be associated with palmoplantar epidermal cysts. Objective : In this study, we evaluated the clinicopathological findings of palmoplantar epidermal cysts and investigated them for the presence of HPV in order to examine the role of HPV in the pathogenesis of this disorder in Korea. Methods : The clinical, histological, immunohistochemical studies were performed on seven cases of plantar cysts, and two cases of palmar cysts. Results : No previous trauma history was seen. Histopathologically, parakeratotic nuclei, or vacuolar strutures within the keratinous mass in the cyst cavity were found. However, we could not find intracytoplasirnic eosinophilic bodies in the wall, the cyst content, or the overlying epidermis. The dyskeratotic keratinocytes were observed in 3 cases. Papillomavirus common antigens were not detected by immunohissochemical staining. Conclusions . Palmoplantar epidermal cysts in Korea have some different histological features compared to those of HPV 60-associated cases in Japan and we could not detect the immunohistochemical evidence of HPV infection in our cases. (Kor J Dermatol 1997;35(3): 507-513)
Facial contouring with botulinum toxin
한광호 ( Kwang Ho Han ) 대한피부과학회 2016 대한피부과학회 학술발표대회집 Vol.68 No.2
Botulinum toxin (BoNT) has the ability to decrease lower face width and sculpt the lower face by inducing an atrophy and hence decreases volume of the masseter muscle. Aesthetic goals of facial contouring with BoNT ·To shape the face into more pleasing contours ·To reduce the appearance of dynamic rhytides ·To provide a synergistic effect Square jaw ·Increased lower facial width as a result of masseteric hypertrophy or benign parotid gland enlargement ·Normal patients but who desire a slimmer appearance with some aesthetically pleasing sculpting of the infra-zygomatic region ·Net effect ·A youthful triangulation of the face ·Impression of weight loss Adverse Events ·Loss of full smile and asymmetric smile ·Weakness of and an aching sensation on chewing ·Jowling and sagging ·Paradoxical masseter bulging ·Overhollowing of the infra-zygomatic region ·Bruising and hematoma ·Neuropraxia: extremely rare Conclusion ·Patients never look at themselves very closely until after BoNT treatment - then they see all kinds of things they had never previously noticed!
한광호(Kwang Ho Han),이철희(Chul-Hee Lee) 유공압건설기계학회 2021 드라이브·컨트롤 Vol.18 No.4
A personal mobility withstanding function for the disabled and vulnerable groups with difficulties in mobility was developed and structural and dynamics analysis was conducted. Personal mobility devices are a very helpful means of transportation for the disabled and vulnerable groups. In addition, the standing function allows individuals to perform a difficult task in while seated and offers a medical advantage to the user. In this study, a personal mobility device was designed and developed to help vulnerable groups and disabled people overcome limited mobility, and communicate with the general people at eye level through standing functions. Through structural and dynamic analysis, the structural safety, optimal speed during rotation, and lateral acceleration of the personal mobility device was analyzed. The analysis results are expected to contribute to the improvement of the users’ convenience and stability of personal mobility.