Kim, Hyung-Jung;Nam, Moon-Suk;Kwon, Hyuck-Moon;Ahn, Chul-Min;Kim, Sung-Kyu;Lee, Won-Young;Song, Kyung-Soon
Tuberculosis and Respiratory Diseases
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v.40
no.2
/
pp.147-152
/
1993
Background: There is evidence that platelet is activated in chronic obstructive pulmonary disease and activated platelet with injured endothelium contribute to the pathogenesis of pulmonary hypertension, prognostic factor of chronic obstructive pulmonary disease. So, we have investigated platelet function further in chronic obstructive pulmonary disease and effect of platelet activation on pulmonary hypertension. Method: We studied platelet aggregation ratio and alpha-granule products such as platelet factor 4(PF4) and beta-thromboglobulin (${\beta}$-TG) in control subjects and COPD without and with pulmonary hypertension subjects. Result: 1) The platelet aggregation ratio (PAR) was $0.99{\pm}0.04$ in control subjects, $0.98{\pm}0.05$ in COPD without pulmonary hypertension subjects and $0.89{\pm}0.08$ in COPD with pulmonary hypertension subjects. The platelet aggregation ratio of COPD subjects was tend to decrease than that of control subjects and the ratio of COPD with pulmonary hypertension subjects was significantly lower than that of control subjects. 2) The platelet factor 4 (PF4, IU/ml) was $4.7{\pm}1.2$ in control subjects, $18.6{\pm}4.9$ in COPD without pulmonary hypertension subjects and $57.2{\pm}12.7$ in COPD with pulmonary hypertension subjects. The level of COPD subjects was significantly higher than that of control subjects and the level of COPD with pulmonary hypertension subjects was significantly higher than that of COPD without pulmonary hypertension subjects. 3) The beta-thromboglobulin (${\beta}$-TG, IU/ml) was $34.4{\pm}5.8$ in control subjects, $80.4{\pm}18.1$ in COPD without pulmonary hypertension subjects and $93.0{\pm}14.0$ in COPD with pulmonary hypertension subjects. The level of COPD subjects was significantly higher than that of conrtrol subjects and the level of COPD with pulmonary hypertension subjects was tend to increase than that of COPD without pulmonary hypertension subjects. 4) There was no correlation between the clinical parameters and PAR, PF4 and ${\beta}$-TG but there was significant correlation among PAR, PF4 and ${\beta}$-TG. Conclusion: The platelet is activated in chronic obstructive pulmonary disease and the platelet of COPD with pulmonary hypertension is tend to be activated more than that of COPD without pulmonary hypertension. So, activated platelet may involve in the pathogenesis and maintenance of pulmonary hypertension in COPD subjects and modulation of platelet activity that might reduce pulmonary hypertension needs to be determined.
Background: Accurate staging of bronchogenic carcinoma is important in determining resectability and metastasis of tumor to the subcarinal nodes is generally believed to indicate poor prognosis. The technique of Transbronchial needle aspiration (TBNA) has offered a safe & effective way to asscess mediastinal lymph node involvement in the staging of lung cancer. We performed TBNA in patients who were suspected lung cancer to evaluate the clinical usefulness of the TBNA. Method: TBNA of the subcarinal lymph node was performed at the time of initial diagnostic bronchoscopy in 60 patients with suspected lung cancer, and 42 cases of histologically proved bronchogenic cancer were analized. Results: The frequency of adequate samples by transbronchial needle aspiration (TBNA) was 81% and the positive rate of malignant cells by TBNA was 14.7%. There were no differences in positive rates by tumor cell types. In patients with thickened carina on bronchoscopy, the TBNA was positive in 33.3% as compared to 5.3% of normal carina on bronchoscopy, and the difference was statistically significant (p<0.05). In patients with enlarged subcarinal lymph node on chest CT, the positive rate of malignant cells (50.0%) was higher than that of normal sized subcarinal lymph node on chest CT (4.8%) (p<0.01). There were no specific complications in the TBNA procedure. Conclusion: TBNA is a relatively safe procedure and it offers the possibility of avoiding the cost and morbidity of surgical staging in patients especially whose carina is thickened on bronchoscopy and whose subcarinal LN was enlarged on chest CT.
Background : Examining the biological susceptibility of Mycobacterium tuberculosis to pyrazinamide (PZA) in vitro is very difficult as PZA is inactive under normal culture conditions. The biological susceptibility test, an enzyme assay for Pzase activity, and a genetic test for pncA gene mutations, were performed in order to predict PZA resistance. Methods : 28 cultured clinical isolates of Mycobacterium tuberculosis were tested. The biological susceptibility was performed by the absolute concentration method using Lowenstein-Jensen media. The PZase activity was tested by means of Wayne's method. A 710-bp region includes the entire open reading frame of pncA was amplified and sequenced. Results : All six strains with positive PZase activity exhibited no pncA mutations with one strain showing a false resistance in the biological susceptibility test. Among the 22 strains with no PZase activity, 21 exhibited showed pncA mutations. In the biological susceptibility test, 20 strains were resistant, and one was susceptible, and the other flied to test. The mutation types varied with ten missense, one silent and one nonsense mutation 1 slipped-strand mispairing, and 6 frameshift mutations. Three strains had an adenine to guanine mutation at position -11 upstream of the start codon. Conclusion : The mutation at the pncA promotor region is frequent at -11 upstream position. Automatic sequencing of pncA is a useful tool for rapid and accurate detection of PZA resistant M. tuberculosis, and for demonstrating the epidemiological relatedness of the PZA resistant M. tuberculosis strains.
Choi, Jae Chol;Koh, Won-Jung;Kwon, Yong Soo;Ryu, Yon Ju;Yu, Chang-Min;Jeon, Kyeongman;Kang, Eun Hae;Suh, Gee Young;Chung, Man Pyo;Kim, Hojoong;Kwon, O Jung;Kim, Tae Sung;Lee, Kyung Soo;Han, Joungho
Tuberculosis and Respiratory Diseases
/
v.58
no.6
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pp.576-581
/
2005
Background : Thoracic actinomycosis is a relatively uncommon anaerobic infection caused by Actinomyces israelii. There have been only a few case reports of endobronchial actinomycosis. The aim of this study was to evaluate the clinical manifestation and treatment of endobronchial actinomycosis. Material and Methods : Seven patients with endobronchial actinomycosis, who were diagnosed in the past 10 years, were retrospectively reviewed. Results : Cough and sputum were the most common symptoms. The chest radiograph and computed tomography showed necrotic consolidation (n=3), atelectasis (n=2), mass (n=1) and an endobronchial nodule (n=1). Proximal broncholithiasis was observed in five patients. All cases were initially suspected to have either lung cancer or tuberculosis. In these patients, the median duration of intravenous antibiotics was 3 days (range 0-12 days) and the median duration of oral antibiotics was 147 days (range 20-412 days). Two patients received oral antibiotic therapy only. There was no clinical evidence of a recurrence. Conclusion : Endobronchial actinomycosis frequently manifests as a proximal obstructive calcified endobronchial nodule that is associated with distal post-obstructive pneumonia. The possibility of endobronchial actinomycosis is suggested when findings of broncholithiasis are present at chest CT. The traditional recommendation of 2-6 weeks of intravenous antibiotics and 6-12 months of oral antibiotic therapy are not necessarily essential in all cases of endobronchial actinomycosis.
Park Won;Choi Yoon-La;Huh Seung-Jae;Yoon Sang-Min;Park Young-Je;Nam Hee-Rim;Ahn Yong-Chan;Lim Do-Hoon;Park Hee-Chul
Radiation Oncology Journal
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v.24
no.1
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pp.37-43
/
2006
Purpose: We wanted to determine the clinical characteristics and prognosis according to the VEGF expression in stage II cervical carcinoma patients treated with definitive radiotherapy. Materials and Methods: We enrolled 31 patients who were diagnosed with cervical cancer from 1995 to 2003 at Samsung Medical Center and their paraffin block tissue samples were available for study. The median age of the patients was 65 years. The mean tumor size was 4.1 cm $(range:\;1.2{\sim}8.2cm)$. Seven patients (22.6%) were suspected of having pelvic lymph node metastasis. An external beam irradiation dose of 45-56.4 Gy was administered to the whole pelvis with a 15 MV linear accelerator, and an additional 24 Gy was given to point A by HDR intracavitary brachytherapy. VEGF staining was defined as positive when more than 10% of the tumor cells were stained. The median follow-up duration was 58 months. Results: A positive VEGF expression was observed in 21 patients (67.7%), There was no significant correlation between the VEGF expression and pelvic lymph node metastasis, tumor size and the response of radiotherapy. During follow-up, 7 patients had recurrence. The complete response rate was not significant between the VEGF(-) and VEGF(+) tumors. However, the VEGF(+) tumors showed a significantly higher recurrence rate in comparison with the VEGF(-) tumors (p=0.040), The three year disease-free survival rates were 100% and 66.7%, respectively, for patients with VEGF(-) or VEGF(+) tumor (p=0.047), Conclusion: The VEGF expression was a significant factor for recurrence and disease-free survival. However, the significance of the VEGF expression is still controversial because of the various definitions of VEGF expression and the mismatches of the clinical data in the previous studies.
Kim, Sae Yoon;Lee, Sang Su;Lee, Jae Min;Kang, Seok Jeong;Kim, Yong Jin;Park, Yong Hoon
Childhood Kidney Diseases
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v.17
no.2
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pp.49-56
/
2013
Purpose: IgA nephropathy (IgAN) is one of the major causes of end-stage renal disease. Mass school urine screening (SUS) has been performed to enable early detection of chronic renal diseases, including IgAN. We wanted to evaluate the patients with IgAN, including those diagnosed through SUS. Methods: Between 1998 and 2010, 64 children were diagnosed with IgAN based on renal biopsy results obtained at the Pediatric Nephrology Department, ${\bigcirc\bigcirc}$ University Hospital. We divided these patients into the SUS group (37 cases), diagnosed through SUS, and the symptomatic (Sx) group (27 cases), diagnosed clinically. The medical records of both groups were analyzed retrospectively. Results: The mean age of the SUS and Sx groups was $10.8{\pm}2.7$ and $9.5{\pm}3.4$ years (P >0.05), respectively. Both groups had a higher proportion of male patients. The time from the notification of an abnormal urinary finding to a hospital visit or renal biopsy was shorter in the Sx group than in the SUS group. Regarding clinical manifestations, there were fewer cases with gross hematuria (P <0.001) and edema (P =0.008) in the SUS group, but there were no differences in terms of the therapeutic regimen and treatment duration. Regarding laboratory parameters, the Sx group had a higher white blood cell count (P =0.007) and lower hemoglobin (P =0.007) and albumin (P =0.000) levels. There were no differences in the renal biopsy findings in both groups, based on the history of gross hematuria or the severity of proteinuria. However, in all 64 patients with IgAN, the light microscopy findings (Hass classification) were related to a history of gross hematuria or the severity of proteinuria. Conclusion: There were no significant clinical and histological differences between the groups, as both had early stage IgAN. Although SUS facilitates the early detection of IgAN, long-term, large-scale prospective controlled studies are needed to assess the benefits of early diagnosis and treatment in chronic renal disease progression.
The purpose of this study was to develop a smartphone based voice therapy program for patients with voice disorders. Contents of voice therapy were collected through analysis of mobile contents related to voice therapy in Korea, experts and users' demand survey, and the program was developed using Android Studio. Content needed for voice therapy was collected through analysis of mobile contents related to voice therapy. The user satisfaction evaluation for application was conducted for five patient with functional voice disorders. The results showed that the mobile contents related to voice therapy in Korea were mostly related to breathing, followed by voice and singing, but only 13 applications were practically practiced for voice therapy. Expert and user demand surveys showed that the patients and therapists both had a high need for content that could provide voice training in places other than the treatment room. Based on this analysis, 'Home Voice Trainer', an smartphone based voice therapy program, was developed. Home Voice Trainer is an application for voice therapy and management based on Android smartphones. It is designed to train voice therapy activities at home that have been trained offline. In addition, the records of voice training of patients were managed online so that patients can maintain voice improvement through continuous voice consulting even after the end of voice therapy. User evaluations show that patients are satisfied with the difficulty and content of voice therapy programs provided by home voice trainers, but lack of a portion of user interface, such as the portion of home button and interface between screens. Further study suggests the clinical application of home voice trainer to the patients with voice disorders. It is expected that the development study and the clinical application of smart contents related to voice therapy will be actively conducted.
Kim, Yongsung;Jeon, Dae-Geun;Cho, Wan Hyeong;Song, Won Seok;Kim, Kyunghoon
Journal of the Korean Orthopaedic Association
/
v.55
no.6
/
pp.511-519
/
2020
Purpose: Schwannoma is a benign tumor that occurs mainly in the peripheral nerve. If the tumor is large or is in areas other than the nerves, it is likely to be mistaken for malignant soft tissue tumors. The authors reviewed 50 cases of giant schwannomas and assessed the distribution of the primary locations, clinical symptoms, radiological and pathological diagnosis, and diagnostic accuracy. Materials and Methods: Of the 214 pathologically confirmed schwannomas, 50 cases with a maximum diameter of 5 cm or more were extracted. The entire cohort was classified into three subgroups (major peripheral nerve, intramuscular, bone) according to the primary location, and the anatomical locations were specified. Results: When the entire cohort was classified according to the primary location, 14 tumors occurred in the major peripheral nerve, 31 cases in the muscle, and 5 cases in the bone. The mean size of the tumor in the entire cohort was 7.0 cm, and the intramuscular subgroup had the largest size with 8.0 cm. The radiological diagnosis revealed 33 out of 50 cases to be benign schwannoma (66.0%), 15 cases as low-grade malignancy (30.0%), and the remaining two cases (4.0%) as a suspicious tuberculosis abscess and tenosynovial giant cell tumor, respectively. On the clinical symptoms, Tinel sign was the most common in the peripheral nerve group with 78.6% (11/14), while 93.5% of the intramuscular group had palpation of the mass with a mean duration of 66.6 months. In the bone group, one out of five cases was reported as a low-grade malignancy. Two cases of postoperative complications were encountered; one was bleeding after tumor excision, which required hemostasis, and the other was peroneal nerve palsy after surgery. Conclusion: When assessing the large-sized soft tissue tumors in the muscles, the possibility of a benign schwannoma should be considered if 1) there is a long period of mass palpation and 2) non-specific findings in MRI. Preoperative pathology confirmation with a biopsy can help reduce the risk of overtreatment.
So Ra Shin;Eun Young Ko;Boo-Kyung Han;Eun Sook Ko;Ji Soo Choi;Haejung Kim
Journal of the Korean Society of Radiology
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v.84
no.2
/
pp.398-408
/
2023
Purpose This study aimed to evaluate the radiological and clinical characteristics of benign adenomyoepitheliomas of the breast. Materials and Methods Over the last 20 years, 120 patients were histologically diagnosed with breast adenomyoepithelioma (AME) at our institution. We excluded 43 patients who were incidentally diagnosed during mastectomy for breast cancer, 28 who underwent percutaneous biopsy without further excision, and 8 who had biopsy-confirmed benign AME and were found to have another pathology after complete excision. We retrospectively reviewed the clinical records and radiological findings of the remaining 41 patients with histologically diagnosed benign breast AMEs after complete excision. Results All 41 patients underwent US; 38 underwent mammography (MG) and US; and 18 underwent MG, US, and MRI. MG detected 38 cases with a round or oval shape (56%), and mass (89%), were non-circumscribed (62%), hyperdense (53%), and without microcalcifications (95%). Breast US revealed suspicious masses (98%) with a non-circumscribed margin (66%), hypoechogenicity (43%), and intratumoral vascularity (63%). All lesions on breast MRI showed suspicious masses (100%) with ill-defined margins (61%), and 84% showed wash-out kinetics. Benign AMEs showed suspicious features of Breast Imaging Reporting and Data System (BI-RADS) category 4 or 5 in 83%-95% of the MG, US, and MRI. Sixteen of the 41 cases were misdiagnosed on the initial core needle biopsy and two were diagnosed as malignancy. Conclusion Benign breast AME often shows suspicious radiological features mimicking a malignant mass on MG, US, and MRI. Differentiating benign AME from other pathologies might be difficult on core needle biopsy, and complete excision is needed for a correct diagnosis.
Park, Chan Hyuk;Yang, Dong-Hoon;Kim, Jong Wook;Kim, Jie-Hyun;Kim, Ji Hyun;Min, Yang Won;Lee, Si Hyung;Bae, Jung Ho;Chung, Hyunsoo;Choi, Kee Don;Park, Jun Chul;Lee, Hyuk;Kwak, Min-Seob;Kim, Bun;Lee, Hyun Jung;Lee, Hye Seung;Choi, Miyoung;Park, Dong-Ah;Lee, Jong Yeul;Byeon, Jeong-Sik;Park, Chan Guk;Cho, Joo Young;Lee, Soo Teik;Chun, Hoon Jai
Journal of Digestive Cancer Research
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v.8
no.1
/
pp.1-50
/
2020
Although surgery was the standard treatment for early gastrointestinal cancers, endoscopic resection is now a standard treatment for early gastrointestinal cancers without regional lymph node metastasis. High-definition white light endoscopy, chromoendoscopy, and image-enhanced endoscopy such as narrow band imaging are performed to assess the edge and depth of early gastrointestinal cancers for delineation of resection boundaries and prediction of the possibility of lymph node metastasis before the decision of endoscopic resection. Endoscopic mucosal resection and/or endoscopic submucosal dissection can be performed to remove early gastrointestinal cancers completely by en bloc fashion. Histopathological evaluation should be carefully made to investigate the presence of risk factors for lymph node metastasis such as depth of cancer invasion and lymphovascular invasion. Additional treatment such as radical surgery with regional lymphadenectomy should be considered if the endoscopically resected specimen shows risk factors for lymph node metastasis. This is the first Korean clinical practice guideline for endoscopic resection of early gastrointestinal cancer. This guideline was developed by using mainly de novo methods and encompasses endoscopic management of superficial esophageal squamous cell carcinoma, early gastric cancer, and early colorectal cancer. This guideline will be revised as new data on early gastrointestinal cancer are collected.
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