1.A Case of Apocrine Hidrocystoma.
Sung Dae KWON ; Young Chul KYE ; Soo Nam KIM
Annals of Dermatology 1999;11(3):179-181
Apocrine hidrocystoma is an uncommon benign tumor derived from the secretory segment of apocrine sweat glands and another name for it is apocrine cystadenoma. A 48-year-old female patient had a solitary, translucent red-brownish cystic nodule, 10 × 6 × 7mm in size, on the periorbital area of her left eye. The lesion had enlarged very slowly for 25 years. We excised the lesion and identified it as apocrine hidrocystoma. This is a case of apocrine hidrocystoma with typical clinical and histopathological findings.
Cystadenoma
;
Female
;
Hidrocystoma*
;
Humans
;
Middle Aged
;
Sweat Glands
2.Resurfacing of Pitted Facial Acne Scars with a Pulsed Erbium: YAG laser.
Sung Dae KWON ; Soo Nam KIM ; Young Chul KYE
Annals of Dermatology 1999;11(1):5-8
BACKGROUND: Laser resurfacing has beneficial effects for the treatment of several skin conditions. Recently, the pulsed erbium:YAG laser has been shown to be a highly effective treatment for several kinds of pitted facial scars. OBJECTIVE: The purpose of this study was to assess the efficacy and safety of pulsed erbium:YAG laser skin resurfacing at the setting of low or high energy for pitted acne scars. METHODS: 65 patients with pitted acne scars were included in this study. All patients had skin types III or IV. All patients were instructed to use tretinoin cream 0.05% nightly for 2-4 weeks prior to the laser treatment. The pulsed erbium:YAG laser with a 2 mm handpiece at the setting of 500 mJ/pulse, 3.5-5 W in 45 patients and 1,000 mJ/pulse, 7-10 W in 20 patients was used. Two weeks after laser treatment, topical application of hydroquinone 4%, tretinoin 0.05%, and hydrocortisone 1% cream was recommended for 2-4 weeks. Facial photographs were obtained at baseline and 2 week intervals postoperatively. The results of treatment were evaluated for the changes of skin texture and color at 1 month, 3 months, and 6 months. RESULTS: In 45 cases treated with 500 mJ/pulse energy, pitted acne scars were improved about 46.7 % on average and no erythema and postinflammatory hyperpigmentation was observed after 6 months. In 20 cases treated with 1,000 mJ/pulse energy, pitted acne scars were improved about 64% on average and erythema in two patients and postinflammatory hyperpigmentation in one patient were observed after 6 months. CONCLUSION: The results of laser treatment for pitted facial acne scars at the setting of high energy are better than those of laser treatment at the setting of low energy.
Acne Vulgaris*
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Cicatrix*
;
Erbium*
;
Erythema
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Humans
;
Hydrocortisone
;
Hyperpigmentation
;
Lasers, Solid-State*
;
Skin
;
Tretinoin
3.Adult Multiple Myofibromas on an Atrophic Patch on the Thigh.
Heesang KYE ; In Hyuk KWON ; Soo Hong SEO ; Hyo Hyun AHN ; Young Chul KYE ; Jae Eun CHOI
Annals of Dermatology 2015;27(5):622-623
No abstract available.
Adult*
;
Humans
;
Myofibroma*
;
Thigh*
4.Adult Multiple Myofibromas on an Atrophic Patch on the Thigh.
Heesang KYE ; In Hyuk KWON ; Soo Hong SEO ; Hyo Hyun AHN ; Young Chul KYE ; Jae Eun CHOI
Annals of Dermatology 2015;27(5):622-623
No abstract available.
Adult*
;
Humans
;
Myofibroma*
;
Thigh*
5.An Associated Case of Common Blue Nevus with Satellite Lesions and Ectopic Mongolian Spot.
In Hyuk KWON ; Heesang KYE ; Dai Hyun KIM ; Jae Eun CHOI ; Soo Hong SEO ; Hyo Hyun AHN ; Young Chul KYE ; Hwa Jung RYU
Korean Journal of Dermatology 2014;52(6):438-439
No abstract available.
Mongolian Spot*
;
Nevus, Blue*
6.Cutaneous Metastatic Rectal Adenocarcinoma in Zosteriform Distribution.
In Hyuk KWON ; Heesang KYE ; Soo Hong SEO ; Hyo Hyun AHN ; Young Chul KYE ; Jae Eun CHOI
Annals of Dermatology 2016;28(3):393-395
No abstract available.
Adenocarcinoma*
7.Synchronous Onset of Symmetrically Associated Extragenital Lichen Sclerosus and Vitiligo on both Breasts and the Vulva.
In Hyuk KWON ; Heesang KYE ; Soo Hong SEO ; Hyo Hyun AHN ; Young Chul KYE ; Jae Eun CHOI
Annals of Dermatology 2015;27(4):456-457
No abstract available.
Breast*
;
Lichen Sclerosus et Atrophicus*
;
Lichens*
;
Vitiligo*
;
Vulva*
8.Epidemiological Characterizations of Class 1 Integrons from Multidrug-Resistant Acinetobacter Isolates in Daejeon, Korea.
Ji Youn SUNG ; Sun Hoe KOO ; Semi KIM ; Kye Chul KWON
Annals of Laboratory Medicine 2014;34(4):293-299
BACKGROUND: Multidrug-resistant (MDR) Acinetobacter spp. acquire antimicrobial agent-resistance genes via class 1 integrons. In this study, integrons were characterized to investigate the antimicrobial resistance mechanisms of MDR Acinetobacter isolates. In addition, the relationship between the integron type and integron-harboring bacterial species was analyzed by using epidemiological typing methods. METHODS: Fifty-six MDR Acinetobacter spp.-A. baumannii (N=30), A. bereziniae (N=4), A. nosocomialis (N=5), and A. pittii (N=17)-were isolated. The minimum inhibitory concentrations (MICs) were determined on the basis of the results of the Epsilometer test (Etest). PCR and DNA sequencing was performed to characterize the gene cassette arrays of class 1 integrons. Multilocus sequence typing (MLST) and repetitive extragenic palindromic sequence (REP)-PCR were performed for epidemiological typing. RESULTS: Class 1 integrons were detected in 50 (89.3%) of the 56 isolates, but no class 2 or 3 integron was found within the cohorts. The class 1 integrons were classified into 4 types: 2.3-kb type A (aacA4-catB8-aadA1), 3.0-kb type B (aacA4-blaI(MP-1)-bla(OXA-2)), 3.0-kb type C (bla(VIM-2)-aacA7-aadA1), and 1.8-kb type D (aac3-1-bla(OXA-2)-orfD). Type A was most prevalent and was detected only in A. baumannii isolates, except for one A. bereziniae isolate; however, type B was amplified in all Acinetobacter isolates except for A. baumannii isolates, regardless of clone and separation time of the bacteria. CONCLUSIONS: Although class 1 integron can be transferred horizontally between unrelated isolates belonging to different species, certain types of class 1 integrons tend to transfer horizontally and vertically among A. baumannii or non-baumannii Acinetobacter isolates.
Acinetobacter/drug effects/isolation & purification/*metabolism
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Acinetobacter Infections/epidemiology/microbiology
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Acinetobacter baumannii/drug effects/isolation & purification/metabolism
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Anti-Bacterial Agents/pharmacology
;
DNA, Bacterial/chemistry/metabolism
;
Drug Resistance, Multiple, Bacterial
;
Humans
;
Integrons/*genetics
;
Microbial Sensitivity Tests
;
Multilocus Sequence Typing
;
Polymerase Chain Reaction
;
Republic of Korea
9.Correlation Between Virulence Genotype and Fluoroquinolone Resistance in Carbapenem-Resistant Pseudomonas aeruginosa.
Hye Hyun CHO ; Kye Chul KWON ; Semi KIM ; Sun Hoe KOO
Annals of Laboratory Medicine 2014;34(4):286-292
BACKGROUND: Pseudomonas aeruginosa is a clinically important pathogen that causes opportunistic infections and nosocomial outbreaks. Recently, the type III secretion system (TTSS) has been shown to play an important role in the virulence of P. aeruginosa. ExoU, in particular, has the greatest impact on disease severity. We examined the relationship among the TTSS effector genotype (exoS and exoU), fluoroquinolone resistance, and target site mutations in 66 carbapenem-resistant P. aeruginosa strains. METHODS: Sixty-six carbapenem-resistant P. aeruginosa strains were collected from patients in a university hospital in Daejeon, Korea, from January 2008 to May 2012. Minimum inhibitory concentrations (MICs) of fluoroquinolones (ciprofloxacin and levofloxacin) were determined by using the agar dilution method. We used PCR and sequencing to determine the TTSS effector genotype and quinolone resistance-determining regions (QRDRs) of the respective target genes gyrA, gyrB, parC, and parE. RESULTS: A higher proportion of exoU+ strains were fluoroquinolone-resistant than exoS+ strains (93.2%, 41/44 vs. 45.0%, 9/20; P< or =0.0001). Additionally, exoU+ strains were more likely to carry combined mutations than exoS+ strains (97.6%, 40/41 vs. 70%, 7/10; P=0.021), and MIC increased as the number of active mutations increased. CONCLUSIONS: The recent overuse of fluoroquinolone has led to both increased resistance and enhanced virulence of carbapenem-resistant P. aeruginosa. These data indicate a specific relationship among exoU genotype, fluoroquinolone resistance, and resistance-conferring mutations.
ADP Ribose Transferases/genetics
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Anti-Bacterial Agents/*pharmacology
;
Bacterial Proteins/genetics
;
Bacterial Toxins/genetics
;
Carbapenems/pharmacology
;
Drug Resistance, Bacterial/*drug effects
;
Fluoroquinolones/*pharmacology
;
Genotype
;
Humans
;
Microbial Sensitivity Tests
;
Multilocus Sequence Typing
;
Mutation
;
Pseudomonas aeruginosa/*genetics/isolation & purification/pathogenicity
;
Sputum/microbiology
;
Virulence
10.Serum Hepcidin Level as an Early Marker of Hematopoietic Activity after Allogeneic Peripheral Blood Stem Cell Transplantation.
Jimyung KIM ; Kye Chul KWON ; Sun Hoe KOO
Journal of Laboratory Medicine and Quality Assurance 2013;35(1):1-7
BACKGROUND: Hepcidin plays a central role in the regulation of iron metabolism, and hepatic iron production is stimulated by iron load and inflammation. Recent animal studies have shown that hepcidin levels increase when hematopoiesis is blocked. We aimed to monitor pre- and post-stem cell transplantation hepcidin levels and evaluate its association with hematologic recovery. METHODS: The study group comprised 12 patients with hematologic malignancies (7 with AML, 4 with ALL, and 1 with refractory anemia with excess blasts-2) undergoing allogeneic peripheral blood stem cell transplantation (PBSCT). One day before and 3 days, 1 week, 2 weeks, 4 weeks, and 8 weeks after PBSCT, reticulocyte count and levels of Hb, ferritin, and C-reactive protein were monitored; serum hepcidin-25 was measured by ELISA. RESULTS: The median serum hepcidin-25 levels (ng/mL) were significantly higher until 1 week after PBSCT (103.6, 103.3, and 96.5) than those at 2, 4, and 8 weeks after PBSCT (63.9, 53.9, and 56.6, respectively). The reticulocyte count also significantly increased from 2 weeks after PBSCT. The hepcidin level showed an inverse correlation with reticulocyte count (r=-0.56, P<0.001) and a weak positive correlation with ferritin (r=0.27, P=0.02). At 2 weeks, patients with high hepcidin levels (> or =63.9) tended to demonstrate lower Hb recovery at 8 weeks than patients with low hepcidin levels did (P=0.15), but without any differences in the incidence of complications. CONCLUSIONS: These findings indicate that hepcidin production is associated with erythropoietic activity and that hepcidin level may be used as an early marker of hematopoietic recovery in PBSCT.
Anemia, Refractory
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Animals
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Antimicrobial Cationic Peptides
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C-Reactive Protein
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Cell Transplantation
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Ferritins
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Hematologic Neoplasms
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Hematopoiesis
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Humans
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Incidence
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Inflammation
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Iron
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Organothiophosphorus Compounds
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Peripheral Blood Stem Cell Transplantation
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Reticulocyte Count
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Stem Cell Transplantation
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Transplants