1.Degenerative Joint Disease of the Knee
The Journal of the Korean Orthopaedic Association 1971;6(4):365-369
The authores did clinical analysis of 150 cases of the Degenerative Joint Disease of the Knee and reviewed literature.
Joint Diseases
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Joints
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Knee
2.Two Cases of Pedunculated Lipofibroma.
Oh Chan KWON ; Chul Jong PARK ; Jong Yuk YI
Korean Journal of Dermatology 1999;37(4):550-552
Pedunculated lipofibroma is a rare disorder characterized by ectopic deposits of mature adipose tissue in the dermis. It is a dorne shaped or sessile papule which occurs at any site and develops later in life. We, herein, report two cases of pedunculated lipofibroma which have developed on the chin of a 64-year-old man and the buttock of a 47-year-old woman.
Adipose Tissue
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Buttocks
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Chin
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Dermis
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Female
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Humans
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Middle Aged
3.Glomus Tumor of Stomach: A case report.
Young Ha OH ; Chan Pil PARK ; Chan Kum PARK ; Sung Jun KWON ; Jung Dal LEE
Korean Journal of Pathology 1994;28(6):669-672
Gastric glomus tumor is an uncommon benign, submucosal neoplasm and does not require radical surgical procedure. Because there are no specific clinical or radiologic features associated with the glomus tumor, it can be recognized only by its histologic characteristics. We report a 30-year-old woman who had 10 years history of epigastric hunger pain. Radiologically, a gastric submucosal tumor was discovered, which was suggestive of leiomyoma. Gastric antrectomy was performed. The tumor cells showed immunohistochemical and ultrastructural evidence of smooth muscle differentiation.
Female
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Humans
4.The effectiveness of endometrial thickness for prediction of implantation in IVF & ET.
Hyuck Chan KWON ; Dong Jae CHO ; Ki Seok OH ; Chan Ho SONG
Korean Journal of Obstetrics and Gynecology 1993;36(12):3912-3919
No abstract available.
5.Vascular Uptake on 18F-FDG PET/CT During the Clinically Inactive State of Takayasu Arteritis Is Associated with a Higher Risk of Relapse
Oh Chan KWON ; Tae Joo JEON ; Min-Chan PARK
Yonsei Medical Journal 2021;62(9):814-821
Purpose:
To evaluate whether vascular uptake on 18 F-fluorodeoxyglucose positron emission tomography/computed tomography ( 18F-FDG PET/CT) during the clinically inactive state of Takayasu arteritis (TAK) is associated with disease relapse.
Materials and Methods:
Patients with TAK who underwent 18F-FDG PET/CT during the clinically inactive state of the disease between 2006 and 2019 were included. Clinically inactive disease was defined as a status not fulfilling the National Institutes of Health (NIH) criteria for active disease in TAK. Relapse was defined as recurrence of clinically active disease after a clinically inactive period, requiring change in the treatment regimen. Vascular uptake on 18F-FDG PET/CT was assessed using target/background ratio (TBR), calculated as arterial maximum standardized uptake value (SUV)/mean SUV in venous blood pool. Multivariable Cox regression analysis was performed to identify factors associated with relapse.
Results:
A total of 33 patients with clinically inactive TAK were included. During a median observation period of 4.5 (0.9–8.1) years, relapse occurred in 9 (27.3%) patients at median 1.3 (0.7–6.9) years. Notably, TBR [1.5 (1.3–1.8) vs. 1.3 (1.1–1.4), p=0.044] was significantly higher in patients who relapsed than in those who did not. On multivariable Cox regression analysis, the presence of NIH criterion 2 [adjusted hazard ratio (HR): 7.044 (1.424–34.855), p=0.017] and TBR [adjusted HR: 11.533 (1.053–126.282), p=0.045] were significantly associated with an increased risk of relapse.
Conclusion
Vascular uptake on 18F-FDG PET/CT and the presence of NIH criterion 2 are associated with future relapse in patients with clinically inactive TAK.
6.Vascular Uptake on 18F-FDG PET/CT During the Clinically Inactive State of Takayasu Arteritis Is Associated with a Higher Risk of Relapse
Oh Chan KWON ; Tae Joo JEON ; Min-Chan PARK
Yonsei Medical Journal 2021;62(9):814-821
Purpose:
To evaluate whether vascular uptake on 18 F-fluorodeoxyglucose positron emission tomography/computed tomography ( 18F-FDG PET/CT) during the clinically inactive state of Takayasu arteritis (TAK) is associated with disease relapse.
Materials and Methods:
Patients with TAK who underwent 18F-FDG PET/CT during the clinically inactive state of the disease between 2006 and 2019 were included. Clinically inactive disease was defined as a status not fulfilling the National Institutes of Health (NIH) criteria for active disease in TAK. Relapse was defined as recurrence of clinically active disease after a clinically inactive period, requiring change in the treatment regimen. Vascular uptake on 18F-FDG PET/CT was assessed using target/background ratio (TBR), calculated as arterial maximum standardized uptake value (SUV)/mean SUV in venous blood pool. Multivariable Cox regression analysis was performed to identify factors associated with relapse.
Results:
A total of 33 patients with clinically inactive TAK were included. During a median observation period of 4.5 (0.9–8.1) years, relapse occurred in 9 (27.3%) patients at median 1.3 (0.7–6.9) years. Notably, TBR [1.5 (1.3–1.8) vs. 1.3 (1.1–1.4), p=0.044] was significantly higher in patients who relapsed than in those who did not. On multivariable Cox regression analysis, the presence of NIH criterion 2 [adjusted hazard ratio (HR): 7.044 (1.424–34.855), p=0.017] and TBR [adjusted HR: 11.533 (1.053–126.282), p=0.045] were significantly associated with an increased risk of relapse.
Conclusion
Vascular uptake on 18F-FDG PET/CT and the presence of NIH criterion 2 are associated with future relapse in patients with clinically inactive TAK.
7.Drug Retention Rate and Factors Associated with Discontinuation of Interleukin-17 Inhibitors in Patients with Axial Spondyloarthritis
Yonsei Medical Journal 2023;64(12):697-704
Purpose:
To assess the drug retention rate of interleukin-17 inhibitors (IL-17is) over long-term observation in patients with axial spondyloarthritis (axSpA) in whom treatment with tumor necrosis factor inhibitors (TNFis) failed and to determine baseline factors associated with discontinuation of IL-17is.
Materials and Methods:
This retrospective cohort study included 68 patients with axSpA started on IL-17is after an inadequate response or intolerance to ≥1 TNFis. Drug retention rates at 1, 2, and 3 years were assessed. Baseline (i.e., at initiation of IL-17is) factors associated with discontinuation of IL-17is were evaluated using multivariable Cox proportional hazard regression analysis.
Results:
Over 1933.9 person-months of observation in 68 patients, discontinuation of IL-17is occurred in 27 (39.7%) patients. Twenty (29.4%) patients discontinued IL-17is because of ineffectiveness, and 7 (10.3%) patients discontinued IL-17is because of adverse events. The 1-year, 2-year, and 3-year drug retention rates for IL-17is were 71.9%, 66.5%, and 62.0%, respectively. Current smoking was associated with a higher risk of IL-17is discontinuation [adjusted hazard ratio (HR)=2.256, 95% confidence interval (CI)=1.053–4.831, p=0.036], while previous use of ≥3 TNFis (vs. 1) was significantly associated with a lower risk of IL-17is discontinuation (adjusted HR=0.223, 95% CI=0.051–0.969, p=0.045).
Conclusion
In patients with axSpA in whom TNFis failed, the long-term drug retention rate of IL-17is appears to be acceptable, with a 3-year drug retention rate of approximately 60%. Current smoking was associated with a higher risk of discontinuing IL-17is, whereas previous use of ≥3 TNFis was associated with a lower risk of discontinuing IL-17is.
9.A Case of Verrucous Hemangioma.
Oh Chan KWON ; Sung Wook KIM ; Seung Cheol BAEK ; Baik Kee CHO
Annals of Dermatology 1998;10(2):143-146
We report a case of a 6-month-old female who had had verrucous hemangioma since birth. The lesions were dark red, verrucous surfaced, hyperkeratotic papules on the right sole. A histopathological examination showed hyperkeratosis, papillomatosis, irregular acanthosis, lobular proliferation and dilatation of blood vessels in the deep dermis with a gap devoid of vessel proliferation in the mid dermis.
Blood Vessels
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Dermis
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Dilatation
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Female
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Hemangioma*
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Humans
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Infant
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Papilloma
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Parturition
10.An experimental study of the effect of the polyurethane film dressing on wound healing.
Chang Keun OH ; Doo Chan MOON ; Kyung Sool KWON ; Tae Ahn CHUNG
Korean Journal of Dermatology 1992;30(5):592-600
We have studied the effects on wound healing of moist conditions in rabbit, achieved by covering excised wounds with the polyurethane film dressings, and dry conditions, by exposure to air during the period from day 1 to day 21 after injury. We have quantified the rate of dermal repair by means of differenetial cell counts of neutrophils, macrophages, fibroblasts, and endothelial cells. The rate of re-epithelialization was also examined. The resuts were as follows: 1. There was an acceleration of the inflammatory phase of repair in the moist wounds. The late phase of inflammation began more rapidly. On day 3 after injury there were 150% more macrophages (p<0.01) and 70% fewer neutrophils (p<0.01) in moist wounds. It was also observed the presence of significantly more fibroblasts (p<0.01) in the moist wounds than the dry wounds. 2. There was also more rapid increase in the number of proliferative phase cells-fibroblasts (p<0.01) and endothelial cells (p<0.01) in moist wounds. the lower content of neutrophils (p<0.05) and the higher number of fibroblasts (p<0.01) which were observed in moist wounds on day 7 after injury suggested that healing was by then well advanced into the proliferative phase. 3. On day 14 after injury, the decrease in the number of fibroblasts in moist wounds suggested that this group entered the remodeling phase of repainr. The lower total cell count in moist wounds than in dry on day 21 after injruy suggested a more rapid progress through the remodeling phase. 4. The reepithelialization of moist wounds was faster than that of dry wounds. These findings suggested that moist wounds occluded with polyurethane film dressing healed more rapidly and in a more orderly manner than did dry wounds, both epidermal and dermal repair being accelerated.
Acceleration
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Bandages*
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Cell Count
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Endothelial Cells
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Fibroblasts
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Inflammation
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Macrophages
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Neutrophils
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Polyurethanes*
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Re-Epithelialization
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Wound Healing*
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Wounds and Injuries*