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A Case of Occupational Hypersensitivity Pneumonitis Associated with Trichloroethylene
Jae, Young,Hwang, Eu Dong,Leem, Ah Young,Kang, Beo Deul,Chang, Soo Yun,Kim, Ho Keun,Park, In Kyu,Kim, Song Yee,Kim, Eun Young,Jung, Ji Ye,Kang, Young Ae,Park, Moo Suk,Kim, Young Sam,Kim, Se Kyu,Chang, The Korean Academy of Tuberculosis and Respiratory 2014 Tuberculosis and Respiratory Diseases Vol.76 No.2
Trichloroethylene (TCE) is a toxic chemical commonly used as a degreasing agent, and it is usually found in a colorless or blue liquid form. TCE has a sweet, chloroform-like odor, and this volatile chlorinated organic chemical can cause toxic hepatitis, neurophysiological disorders, skin disorders, and hypersensitivity syndromes. However, the hypersensitivity pneumonitis (HP) attributed to TCE has rarely been reported. We hereby describe a case of HP associated with TCE in a 29-year-old man who was employed as a lead welder at a computer repair center. He was installing the capacitors on computer chip boards and had been wiped down with TCE. He was admitted to our hospital with complaints of dry coughs, night sweats, and weight losses for the past two months. HP due to TCE exposure was being suspected due to his occupational history, and the results of a video-associated thoracoscopic biopsy confirmed the suspicions. Symptoms have resolved after the steroid pulse therapy and his occupational change. TCE should be taken into consideration as a potential trigger of HP. Early recognition and avoidance of the TCE exposure in the future is important for the treatment of TCE induced HP.
Case Report : A Case of Occupational Hypersensitivity Pneumonitis Associated with Trichloroethylene
( Young Jae Kim ),( Eu Dong Hwang ),( Ah Young Leem ),( Beo Deul Kang ),( Soo Yun Chang ),( Ho Keun Kim ),( In Kyu Park ),( Song Yee Kim ),( Eun Young Kim ),( Ji Ye Jung ),( Young Ae Kang ),( Moo Suk 대한결핵 및 호흡기학회 2014 Tuberculosis and Respiratory Diseases Vol.76 No.2
Trichloroethylene (TCE) is a toxic chemical commonly used as a degreasing agent, and it is usually found in a colorless or blue liquid form. TCE has a sweet, chloroform-like odor, and this volatile chlorinated organic chemical can cause toxic hepatitis, neurophysiological disorders, skin disorders, and hypersensitivity syndromes. However, the hypersensitivity pneumonitis (HP) attributed to TCE has rarely been reported. We hereby describe a case of HP associated with TCE in a 29-year-old man who was employed as a lead welder at a computer repair center. He was installing the capacitors on computer chip boards and had been wiped down with TCE. He was admitted to our hospital with complaints of dry coughs, night sweats, and weight losses for the past two months. HP due to TCE exposure was being suspected due to his occupational history, and the results of a video-associated thoracoscopic biopsy confirmed the suspicions. Symptoms have resolved after the steroid pulse therapy and his occupational change. TCE should be taken into consideration as a potential trigger of HP. Early recognition and avoidance of the TCE exposure in the future is important for the treatment of TCE induced HP.
Hwang, Eu Chang,Yu, Seong Hyeon,Jo, Yang Hyun,Jung, Seung Il,Kang, Taek Won,Kwon, Dong Deuk,Choi, Chan,Heo, Suk Hee,Hwang, Jun Eul,Jung, Sung-Hoon,Jung, Tae-Young Medknow PublicationsMedia Pvt Ltd 2016 ASIAN JOURNAL OF ANDROLOGY Vol.18 No.1
<P>Several studies have revealed that the preoperative serum testosterone and percent tumor volume (PTV) predict extra-prostatic extension (EPE) and biochemical recurrence (BCR) after radical prostatectomy. This study investigated the prognostic significance of serum testosterone and PTV in relation to EPE and BCR after laparoscopic radical prostatectomy (LRP). We reviewed 520 patients who underwent LRP between 2004 and 2012. PTV was determined as the sum of all visually estimated tumor foci in every section. BCR was defined as two consecutive increases in the postoperative prostate-specific antigen (PSA) >0.2 ng ml<SUP>−1</SUP>. The threshold for serum total testosterone was 3.0 ng ml<SUP>−1</SUP>. Multivariate logistic regression was used to define the effect of variables on the risk of EPE and BCR. A low serum testosterone (<3.0 ng ml<SUP>−1</SUP>) was associated with a high serum PSA, Gleason score, positive core percentage of the prostate biopsy, PTV, and all pathological variables. On multivariate analysis, similar to previous studies, the serum PSA, biopsy positive core percentage, Gleason score, and pathological variables predicted EPE and BCR. In addition, low serum testosterone (<3.0 ng ml<SUP>−1</SUP>, adjusted OR, 8.52; 95% CI, 5.04–14.4, <I>P</I> = 0.001) predicted EPE and PTV (adjusted OR, 1.02; 95% CI, 1.01–1.05, <I>P</I> = 0.046) predicted BCR. In addition to previous predictors of EPE and BCR, low serum testosterone and PTV are valuable predictors of EPE and BCR after LRP.</P>
Hwang Eu Chang,de Fazio Adam,Hamilton Kallie,Bakker Caitlin,Pariser Joseph J.,Dahm Philipp 대한남성과학회 2022 The World Journal of Men's Health Vol.40 No.1
Purpose: To assess the effects of buccal mucosal graft site non-closure versus closure on postoperative oral morbidity for male undergoing augmentation urethroplasty for urethral stricture. Materials and Methods: We included randomized controlled trials. Inclusion criteria were male over the age of 18 with urethral stricture disease requiring reconstruction with buccal mucosal graft harvest. Primary outcomes of the review were postoperative oral pain, need for secondary oral procedures and cosmetic defects. Results: We included 5 studies with 346 randomized patients with urethral strictures, of whom 260 completed the trials. In terms of primary outcomes, non-closure graft site may reduce oral pain on postoperative day #1 (standard mean difference [SMD] 0.24 lower; 95% confidence interval [CI] 0.61 lower to 0.12 higher; low certainty evidence [CoE]) but we are uncertain how this impacts pain on postoperative days 3 to 6 (SMD 0.35; 95% CI 0.12 to 0.81 higher; very low CoE). We are also very uncertain as to how it affects the need for secondary oral procedures (risk ratio [RR] 0.22; 95% CI 0.01 to 4.28; very low CoE). Non-closure may increase the risk of cosmetic defects (RR 2.40; 95% CI 0.93 to 6.22; low CoE). Conclusions: This review describes the trade-off for buccal mucosal graft site non-closure versus closure for various patientimportant outcomes; decision-making will likely hinge on the relative value individual patients and surgeons place on them. The supporting evidence was rated as low and very low, thereby signaling substantial underlying uncertainty and the need for better trials.
Eu Chang Hwang,Do Kyung Kim,강호원,구자윤,정현진,Hong Wook Kim,Jae Hung Jung 대한요로생식기감염학회 2019 Urogenital Tract Infection Vol.14 No.3
This article is the third translation of a GRADE series published in the BMJ for developing and presenting recommendations for managing patients. The strength of a recommendation reflects the extent to which we can be confident that desirable effects of an intervention outweigh any undesirable effects. GRADE classifies the strength of recommendations as strong or weak. The strength of recommendation is determined by the balance between desirable and undesirable consequences of alternative management strategies, quality of the evidence, variability in values and preferences, and the appropriate usage of resources.
Expression of Caveolin-1 in Rat Urinary Bladder with Cyclophosphamide-Induced Cystitis
김선옥,권동득,송승희,이승철,조경아,황인상,Eu Chang Hwang,유호송,황의창 대한배뇨장애요실금학회 2012 International Neurourology Journal Vol.16 No.4
Purpose: The purposes of this study were to investigate the effect of cyclophosphamide (CYP)-induced inflammatory cystitis on caveolin 1 in rat urinary bladder and to determine the role of these molecules in the bladder dysfunction that occurs in inflammatory change in rat urinary bladder. Methods: Female Sprague-Dawley rats were divided into control (n=30) and experimental (n=30) groups. Cystitis in experimental group was induced by intraperitoneal injection of CYP (200 mg/kg). The control group underwent an intraperitoneal saline injection. After 3 days, urodynamic studies were done to measure the contraction interval and contraction pressure. The expression and cellular localization of caveolin 1 were determined by Western blot and immunofluorescent study in rat urinary bladder. Results: In cystometrograms, the contraction interval (minute) was significantly increased in the CYP-induced cystitis rats (15.8±1.5) than in the control group (6.3±0.5) (P<0.05). Conversely, the average contraction pressure (mmHg) was significantly higher in the CYP-induced cystitis rats (15.6±1.7) than in the control group (11.3±0.5) (P<0.05). Caveolin 1 was expressed in the capillaries, arteriols and venules. The protein expression of caveolin 1 was significantly decreased in the CYP-induced cystitis rats (P<0.05). Conclusions: Inflammatory change of urinary bladder maybe causes a significant change in the expression of caveolin 1. These findings suggest that caveolin 1 might have a functional role in the bladder dysfunction related with cystitis in rat urinary bladder.
Kang, Minyong,Park, Jae Young,Jeong, Chang Wook,Hwang, Eu Chang,Song, Cheryn,Hong, Sung-Hoo,Kwak, Cheol,Chung, Jinsoo,Sung, Hyun Hwan,Jeon, Hwang Gyun,Jeong, Byong Chang,Park, Se Hoon,Jeon, Seong Soo Elsevier 2018 The Journal of urology Vol.200 No.5
<P>Conclusions: Conditional survival improved with time after initial tyrosine kinase inhibitor treatment in patients with metastatic renal cell carcinoma. Our study offers valuable information for practical survival estimations and relevant prognosticators in patients with metastatic renal cell carcinoma who receive first line tyrosine kinase inhibitor.</P>
90-Day Inhalation Toxicity of Dimethylamine in F344 Rats
Kyung Seuk Song,Kun Ho Park,Jeong Hyun Kim,Dong Un Han,Chan Hee Chae,Sung Jin Park,Hyun Woo Kim,Jun Sung Kim,Jin Hong Park,Guk Joung Eu,Jin Hua,Hyun Sun Cho,Soon Kyung Hwang,Seung Hee Chang,Kyeong Nam 한국독성학회 2005 Toxicological Research Vol.21 No.2
Dimethylamine (DMA) is a widely used commodity chemical with few toxicity data. Groups of 10 male and female F-344 rats were exposed by inhalation to 0, 5, 10, 20, 40 and 80 ppm of DMA for 6 hrs/day, 5 days/week for 90 days. The changes of body weight, organ weight, hematology, clinical chemistry, and histopathological changes were evaluated after the exposure. As the results, the body weight was significantly decreased at 80 ppm in male and female rats (p<0.05). The absolute lung weight showed no statistically significant changes in any group. In contrast, the relative lung weight significantly increased at 80 ppm in male and female rats (p<0.05). Erythrocytes, mean cell hemoglobin, leukocytes, neutrophil, and platelet numbers were significantly increased in male and female at 40 or 80 ppm of DMA (p<0.05, p<0.01). In addition, the serum values of total protein, urea nitrogen were increased in male and creatine kinase, total protein were increased in female rats at 40 or 80 ppm (p<0.05, p<0.01). Histopathological examinations of the male and female lung samples showed slight hyperplasia and congestion at 80 ppm. Taken together, our study revealed that maximum tolerated dose of DMA would be over 40 ppm