Jin Soo Lee

Catholic University of Korea, Sŏul, Seoul, South Korea

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Publications (232)982.93 Total impact

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    ABSTRACT: Thromboembolism is the most common complication in coiling for an unruptured aneurysm and is frequent in patients with high on-treatment platelet reactivity (HTPR) who are prescribed a standard antiplatelet preparation for its prevention. To evaluate the effect of a modified antiplatelet preparation compared with a standard preparation in patients with HTPR undergoing coiling. A prospective randomized open-label active-control trial with blinded outcome assessment at the Seoul National University Bundang Hospital from May 27, 2013, to April 7, 2014. Patients with HTPR were randomly assigned (1 to 1) to the standard or modified preparation group. Patients without HTPR were assigned to the non-HTPR group. A total of 228 patients undergoing coiling for unruptured aneurysms were enrolled and allocated to the study, 126 in the HTPR group (63 to the standard preparation group and 63 to the modified preparation group) and 102 to the non-HTPR group. Intent-to-treat analysis was performed. The modified preparation (HTPR to aspirin, 300 mg of aspirin and 75 mg of clopidogrel bisulfate; and HTPR to clopidogrel, 200 mg of cilostazol added to the standard regimen) was performed before coiling in the modified preparation group. Standard preparation (100 mg of aspirin and 75 mg of clopidogrel) was maintained in the standard preparation and non-HTPR groups. The primary outcome was a thromboembolic event defined as thromboembolism during coiling and a transient ischemic attack or ischemic stroke within 7 days after coiling. The principal secondary outcome was a bleeding complication according to Thrombolysis in Myocardial Infarction bleeding criteria within 30 days after coil embolization. The thromboembolic event rate was low in the modified preparation group (1 of 63 [1.6%]) compared with the standard preparation group (7 of 63 [11.1%]; adjusted risk difference, -11.7% [95% CI, -21.3% to -2.0%]; P = .02), which had a higher thromboembolic risk than the non-HTPR group (1 of 102 [1.0%]; adjusted risk difference, 8.6% [95% CI, 1.0% to 16.3%]; P = .03). All bleeding complications were of minimal grade according to Thrombolysis in Myocardial Infarction bleeding criteria. The bleeding rate was not different between the modified (6 of 63 [9.5%]) and standard (4 of 63 [6.3%]) preparation groups (adjusted risk difference, 5.6% [95% CI, -4.2% to 15.4%]; P = .26). Modified antiplatelet preparation for patients with HTPR compared with standard antiplatelet preparation reduced the thromboembolic event rate in coiling for an unruptured aneurysm without increasing bleeding. Clinical Research Information Service Identifier: KCT0000804.
    05/2015; DOI:10.1001/jamaneurol.2015.0654
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    ABSTRACT: Actinomycosis is a chronic suppurative granulomatous infectious disease caused by actinomyces species that is characterized by formation of characteristic clumps called as sulfur granules. Abdominal actinomycosis is a rare disease and is often difficult to diagnose before operation. Abdominal actinomycosis infiltrating into the abdominal wall and adhering to the colon is even rarer. Most abdominal actinomycosis develops after operation, trauma or inflammatory bowel disease, and is also considered as an opportunistic infection in immunocompromised patient with underlying malignancy, diabetes mellitus, human immunodefidiency virus infection, etc. Actinomycosis is diagnosed based on histologic demonstration of sulfur granules in surgically resected specimen or pus, and treatment consists of long-term penicillin based antibiotics therapy with or without surgical resection. Herein, we report an unusual case of abdominal wall actinomycosis which developed in a patient after acupuncture and presented as abdominal wall mass that was first mistaken for abdominal wall invasion of diverticulum perforation.
    The Korean journal of gastroenterology = Taehan Sohwagi Hakhoe chi 04/2015; 65(4):236-40. DOI:10.4166/kjg.2015.65.4.236
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    ABSTRACT: Blood-based circulating free (cf) tumor DNA may be an alternative to tissue-based EGFR mutation testing in NSCLC. This exploratory analysis compares matched tumor and blood samples from the FASTACT-2 study. Patients were randomized to receive six cycles of gemcitabine/platinum plus sequential erlotinib or placebo. EGFR mutation testing was performed using the cobas(®) tissue test and the cobas(®) blood test (in development). Blood samples at baseline, cycle 3, and progression were assessed for blood test detection rate, sensitivity and specificity; concordance with matched tumor analysis (n = 238), and correlation with progression-free survival (PFS) and overall survival (OS). Concordance between tissue and blood tests was 88%, with blood test sensitivity of 75% and a specificity of 96%. Median PFS was 13.1 versus 6.0 months for erlotinib and placebo, respectively, for those with baseline EGFR mut+ cfDNA (HR 0.22, 95% CI 0.14-0.33, P < 0.0001) and 6.2 versus 6.1 months, respectively, for the EGFR mut- cfDNA subgroup (HR 0.83, 95% CI 0.65-1.04, P = 0.1076). For patients with EGFR mut+ cfDNA at baseline, median PFS was 7.2 versus 12.0 months for cycle 3 EGFR mut+ cfDNA versus cycle 3 EGFR mut- patients, respectively (HR 0.32, 95% CI 0.21-0.48, P < 0.0001); median OS by cycle 3 status was 18.2 and 31.9 months, respectively (HR 0.51, 95% CI 0.31-0.84, P = 0.0066). Blood-based EGFR mutation analysis is relatively sensitive and highly specific. Dynamic changes in cfDNA EGFR mutation status relative to baseline may predict clinical outcomes. Copyright © 2015, American Association for Cancer Research.
    Clinical Cancer Research 03/2015; DOI:10.1158/1078-0432.CCR-14-2594 · 8.19 Impact Factor
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    ABSTRACT: Paradoxical reactions of tuberculosis (TB) in vertebral osteomyelitis are very rarely reported. We experienced four cases of severe paradoxical reactions in tuberculous vertebral osteomyelitis. Four cases of tuberculous vertebral osteomyelitis were confirmed by an acid-fast bacilli smear or culture. The patients were human immunodeficiency virus negative, and were all initially treated with isoniazid, ethambutol, rifampicin and pyrazinamide. Their symptoms improved with anti-TB drugs. However, after 2-12 weeks, their symptoms had recurred, and spinal magnetic resonance imaging at the time of readmission revealed an aggravation of vertebral osteomyelitis. Operations were carried out to relieve severe pain or spinal cord decompression. Through continued anti-TB drug therapy, all patients recovered without sequelae.
    02/2015; 47(4):1-4. DOI:10.3109/00365548.2014.990508
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    ABSTRACT: Development of brain metastasis results in a significant reduction in overall survival. However, there is no an effective tool to predict brain metastasis in non-small cell lung cancer (NSCLC) patients. We conducted this study to develop a feasible nomogram that can predict metastasis to the brain as the first relapse site in patients with curatively resected NSCLC. A retrospective review of NSCLC patients who had received curative surgery at National Cancer Center (Goyang, South Korea) between 2001 and 2008 was performed. We chose metastasis to the brain as the first relapse site after curative surgery as the primary endpoint of the study. A nomogram was modeled using logistic regression. Among 1218 patients, brain metastasis as the first relapse developed in 87 patients (7.14%) during the median follow-up of 43.6 months. Occurrence rates of brain metastasis were higher in patients with adenocarcinoma or those with a high pT and pN stage. Younger age appeared to be associated with brain metastasis, but this result was not statistically significant. The final prediction model included histology, smoking status, pT stage, and the interaction between adenocarcinoma and pN stage. The model showed fairly good discriminatory ability with a C-statistic of 69.3% and 69.8% for predicting brain metastasis within 2 years and 5 years, respectively. Internal validation using 2000 bootstrap samples resulted in C-statistics of 67.0% and 67.4% which still indicated good discriminatory performances. The nomogram presented here provides the individual risk estimate of developing metastasis to the brain as the first relapse site in patients with NSCLC who have undergone curative surgery. Surveillance programs or preventive treatment strategies for brain metastasis could be established based on this nomogram. Copyright © 2015 Elsevier Ireland Ltd. All rights reserved.
    Lung cancer (Amsterdam, Netherlands) 02/2015; 88(2). DOI:10.1016/j.lungcan.2015.02.006 · 3.74 Impact Factor
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    ABSTRACT: To compare the Helicobacter pylori (H. pylori) eradication rate of clarithromycin-based triple therapy, metronidazole-based triple therapy, sequential therapy and concomitant therapy. A total of 680 patients infected with H. pylori were divided into 4 groups and each group was treated with a different eradication therapy. Clarithromycin-based triple therapy was applied to the first group [rabeprazole, amoxicillin and clarithromycin (PAC) group: proton pump inhibitor (PPI), amoxicillin, clarithromycin], whereas the second group was treated with metronidazole-based triple therapy [rabeprazole, amoxicillin and metronidazole (PAM) group: PPI, amoxicillin, metronidazole]. The third group was treated with rabeprazole and amoxicillin, followed by rabeprazole, clarithromycin and metronidazole (sequential group). The final group was simultaneously treated with rabeprazole, amoxicillin clarithromycin and metronidazole (concomitant therapy group). In the case of a failure to eradicate H. pylori, second-line quadruple and third-line eradication therapies were administered. The per protocol (PP) analysis was performed on 143, 139, 141 and 143 patients in the PAC, PAM, sequential and concomitant groups, respectively. We excluded patients who did not receive a C(13)-urea breath test (22, 20, 23 and 22 patients, respectively) and patients with less than an 80% compliance level (5, 11, 6 and 5 patients, respectively). The eradication rates were 76.2% (109/143) in the PAC group, 84.2% (117/139) in the PAM group, 84.4% (119/141) in the sequential group and 94.4% (135/143) in the concomitant group (P = 0.0002). All 14 patients who failed second-line therapy were treated with third-line eradication therapy. Among these 14 patients, 6 infections were successfully eradicated with the third-line therapy. Both PP and intention-to-treat analysis showed an eradication rate of 42.9% (6/14). In the PAC group, 3 of 4 patients were successfully cured (3/4, 75%); 2 of 2 patients in the PAM group (2/2, 100%) and 1 of 5 patients in the sequential group (1/5, 20%) were also cured. In the concomitant group, all 3 patients failed (0/3, 0%). The eradication rate for the concomitant therapy was much higher than those of the standard triple therapy or sequential therapy (ClinicalTrials.gov number NCT01922765).
    World Journal of Gastroenterology 01/2015; 21(1):351-9. DOI:10.3748/wjg.v21.i1.351 · 2.43 Impact Factor
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    ABSTRACT: Injury in the dominant language hemisphere typically leads to agraphia, however we report a patient with agraphia after injury to the right angular gyrus. A 71-year-old Korean woman presented with the complaint of an inability to write for the last 7 days. The patient had been illiterate for most of her life, but had started learning to write Hangul, the Korean alphabet, at a welfare center 3 years ago. On language screening she was unable to write although she could read, and other language functions showed no abnormalities. Brain MRI showed acute infarction in the right angular gyrus. Her writing patterns displayed features of surface agraphia, indicative of phoneme-to-grapheme conversion with phonetic writing of targets. Additionally, she manifested visual errors. A functional MRI indicated that her left hemisphere was language dominant. This patient experienced agraphia resulting from pure impairment of visuo-constructive function after acute infarction in the right angular gyrus.
    Journal of Clinical Neuroscience 01/2015; 22(4). DOI:10.1016/j.jocn.2014.09.023 · 1.32 Impact Factor
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    ABSTRACT: The effectiveness of the 2011-2012 seasonal influenza vaccine was evaluated in adult Korean populations with regard to how well it could prevent laboratory-confirmed influenza and influenza-related complications. A retrospective case-control and retrospective cohort study was conducted among patients who visited four selected hospitals from September 2011 to May 2012. The analysis included 1,130 laboratory-confirmed influenza patients. For each influenza case, one control patient was chosen at a ratio of 1:1. A control was defined as an age group-matched patient who visited the same hospital with influenza-like illness within 48 hours of symptom onset but for whom laboratory tests were negative for influenza. Age group and visit date were matched between the cases and controls. Vaccine effectiveness (VE) was defined as [100 × (1-odds ratio for influenza in vaccinated versus non-vaccinated persons)]. The patients with laboratory-confirmed influenza were followed for at least one month through reviewing the medical records and conducting a telephone interview. The VE of the 2011-2012 seasonal influenza vaccine was 3.8% [95% confidence interval (CI), -16.5% to 20.6%] for preventing laboratory-confirmed influenza, -16.1% (95% CI, -48.3 to 9.1) for influenza A and 26.2% (95% CI, -2.6 to 46.2) for influenza B. The age-specific adjusted VE was 0.3% (95% CI, -29.4 to 23.1) among participants aged 19 to 49 years, 11.9% (95% CI, -34.3 to 42.2) among those aged 50 to 64 years and -3.9% (-60.1 to 32.5) among those aged ≥65 years. The adjusted VE for preventing any influenza-related complications was -10.7% (95% CI, -41.1% to 42.2%). The 2011-2012 seasonal influenza vaccine was not effective in preventing laboratory-confirmed influenza or influenza-related complications in adult Korean populations.
    PLoS ONE 01/2015; 10(3):e0098716. DOI:10.1371/journal.pone.0098716 · 3.53 Impact Factor
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    ABSTRACT: To study the significance of intracranial artery calcification as a prognostic marker for acute ischemic stroke patients undergoing revascularization treatment after middle cerebral artery (MCA) trunk occlusion. Patients with acute MCA trunk occlusion, who underwent intravenous and/or intra-arterial revascularization treatment, were enrolled. Intracranial artery calcification scores were calculated by counting calcified intracranial arteries among major seven arteries on computed tomographic angiography. Patients were divided into high (HCB; score ≥3) or low calcification burden (LCB; score <3) groups. Demographic, imaging, and outcome data were compared, and whether HCB is a prognostic factor was evaluated. Grave prognosis was defined as modified Rankin Scale 5-6 for this study. Of 80 enrolled patients, the HCB group comprised 15 patients, who were older, and more commonly had diabetes than patients in the LCB group. Initial National Institutes of Health Stroke Scale (NIHSS) scores did not differ (HCB 13.3±2.7 vs. LCB 14.6±3.8) between groups. The final good reperfusion after revascularization treatment (thrombolysis in cerebral infarction score 2b-3, HCB 66.7% vs. LCB 69.2%) was similarly achieved in both groups. However, the HCB group had significantly higher NIHSS scores at discharge (16.0±12.3 vs. 7.9±8.3), and more frequent grave outcome at 3 months (57.1% vs. 22.0%) than the LCB group. HCB was proven as an independent predictor for grave outcome at 3 months when several confounding factors were adjusted (odds ratio 4.135, 95% confidence interval, 1.045-16.359, P=0.043). Intracranial HCB was associated with grave prognosis in patients who have undergone revascularization for acute MCA trunk occlusion.
    01/2015; 17(1):67. DOI:10.5853/jos.2015.17.1.67
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    ABSTRACT: A 64-year-old male patient diagnosed with amyotrophic lateral sclerosis 2 years ago was admitted with fever and chills. The patient had complex medical history and several indwelling catheters/tubes in his body. To identify the infection focus, Ga whole-body scintigraphy and SPECT/CT were obtained. Ga whole-body scintigraphy demonstrated focal Ga uptake in the lower pelvic cavity and the right kidney. Additional Ga SPECT/CT images were obtained, and it enabled characterization of these uptakes as infection of bladder stones that result in pyelitis.
    Clinical Nuclear Medicine 12/2014; DOI:10.1097/RLU.0000000000000618 · 2.86 Impact Factor
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    ABSTRACT: Pneumonia and acute exacerbation of chronic illness are leading causes of influenza-related hospitalization. Therefore, influenza and pneumococcal vaccinations are strongly recommended for adults with comorbidities. Using a hospital-based influenza surveillance system, we performed a multicenter, prospective cohort study of patients visiting emergency rooms with influenza-like illness (ILI) during the influenza epidemic period in 2013-2014. Patients aged ≥ 19 years were enrolled, and clinical data was collected. Multivariate analyses were performed to estimate the effectiveness of influenza and pneumococcal vaccination in preventing pneumonia development and hospitalization. During study periods, 2,262 patients with ILI were registered. Among 2,217 patients with available vaccination records, 31.9% (707 patients) and 9.7% (216 patients) had received influenza and pneumococcal vaccines, respectively. Among patients who had been administered a pneumococcal vaccine, 94.4% had received the 23-valent polysaccharide vaccine (PPV23). The adjusted influenza vaccine effectiveness for preventing pneumonia development and hospitalization was 64.0% (95% confidence interval [CI] = 29% - 81%) and 35.0% (95% CI = 12% - 52%), respectively. Pneumococcal vaccination did not reduce pneumonia development or hospitalization. In conclusion, influenza rather than PPV23 vaccination may reduce pneumonia development and hospitalization in patients with preceding ILI. Copyright © 2014, American Society for Microbiology. All Rights Reserved.
    Clinical and vaccine Immunology: CVI 12/2014; 22(2). DOI:10.1128/CVI.00673-14 · 2.37 Impact Factor
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    ABSTRACT: Background To investigate a prognostic role of gross tumor volume (GTV) changes on survival outcomes following concurrent chemoradiotherapy (CCRT) in stage III non-small-cell lung cancer (NSCLC) patients.Methods We enrolled 191 patients with stage III NSCLC from 2001 to 2009 undergoing definitive CCRT. The GTV of 157 patients was delineated at the planning CT prior to CCRT and with a follow-up CT 1 month after CCRT. We assessed the volumetric parameters of pre-treatment GTV (GTVpre) post-treatment GTV (GTVpost), and volume reduction ratio of GTV (VRR). The primary endpoint was overall survival (OS) and secondary endpoints were progression-free survival (PFS) and locoregional progression-free survival (LRPFS). The best cut-off value was defined as that which exhibited the maximum difference between the two groups.ResultsThe median follow-up duration was 52.7 months in surviving patients. Median survival, 3-year OS, PFS and LRPFS rates were 25.5 months, 36.4%, 23.0%, and 45.0%, respectively. The selected cut-off values were 50 cm3 for GTVpre , 20 cm3 for GTVpost , and 50% for VRR. The smaller GTVpre and GTVpost values were associated with better OS (p¿<¿0.001 and p¿=¿0.015) and PFS (p¿=¿0.001 and p¿=¿0.004), respectively, upon univariate analysis. The higher VRR of¿>¿50% was associated with a trend toward poorer OS (p¿=¿0.004) and PFS (p¿=¿0.054). Upon multivariate analysis, smaller GTVpre indicated significantly improved OS (p¿=¿0.001), PFS (p¿=¿0.013) and LRPFS (p¿=¿0.002), while smaller GTVpost was marginally significant for PFS (p¿=¿0.086). Higher VRR was associated with a trend toward poorer OS (p¿=¿0.075).Conclusions In patients with stage III NSCLC undergoing definitive CCRT, GTVpre was an independent prognostic factor of survival. Notably, improved outcome was not correlated with higher VRR after short-term follow-up with CT alone.
    Radiation Oncology 12/2014; 9(1):283. DOI:10.1186/s13014-014-0283-6 · 2.36 Impact Factor
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    ABSTRACT: Disease flare-up after discontinuing epidermal growth factor receptor (EGFR) tyrosine kinase inhibitor (TKI) has been considered as a critical issue in lung cancer patients who have experienced radiologic progression after showing initial durable response. This is a case of systemic nocardiosis that occurred after chronic steroid use for radionecrosis from stereotactic radiosurgery. It was initially thought as a disease flare-up after stopping EGFR-TKI.
    Tuberculosis and Respiratory Diseases 12/2014; 77(6):271-3. DOI:10.4046/trd.2014.77.6.271
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    ABSTRACT: Background Levodopa (l-dopa) therapy in Parkinson's disease (PD) increases serum homocysteine levels because of its metabolism via catechol O-methyltransferase, which may lead to endothelial dysfunction.Method We enrolled 40 PD patients treated with l-dopa, 33 PD patients treated with l-dopa/entacapone, 22 untreated PD and 30 controls, and compared the flow-mediated dilation in these subjects.ResultsThe flow-mediated dilation was significantly lower in PD patients with l-dopa (6.0 ± 1.8%) than in those with l-dopa/entacapone (7.2 ± 1.1%, P = 0.03), untreated PD patients (7.8 ± 1.2%, P < 0.05), and controls (8.5 ± 2.9%, P < 0.05). The homocysteine level was significantly higher in PD patients with l-dopa than in other groups. In a multivariate logistic regression model, the uppermost homocysteine quartile was an independent predictor of the lowest tertile of flow-mediated dilation (odds ratio, 6.33; 95% confidence interval, 1.61-26.65; P = 0.012).Conclusions Our findings indicate that endothelial dysfunction may be associated with chronic l-dopa treatment in patients with PD. © 2014 International Parkinson and Movement Disorder Society
    Movement Disorders 10/2014; 29(12). DOI:10.1002/mds.26005 · 5.63 Impact Factor
  • Cancer Research 10/2014; 74(19 Supplement):CT342-CT342. DOI:10.1158/1538-7445.AM2014-CT342 · 9.28 Impact Factor
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    ABSTRACT: The clinical profile of EGFR-mutant lung cancer carrying sporadic primary EGFR T790M mutation was similar to that of classic EGFR-mutant lung cancer, except for an overrepresentation of never-smokers and brain metastasis. Additionally, any cytotoxic drugs showed no increased sensitivity for this mutant tumor. Thus, novel treatment strategies including T790M-targeting drugs are required to improve the efficacy of EGFR-TKIs in this population. Background It has been reported that the presence of pretreatment EGFR T790M mutation may reduce the efficacy to EGFR tyrosine kinase inhibitors (TKI) in EGFR-mutant lung cancer. However, clinicopathologic features related to the likelihood of T790M mutation before treatment remains unknown. Patients and Methods DNA from 124 pretreatment tissue samples from patients with advanced non-small cell lung cancer carrying sensitive EGFR mutations was genotyped for EGFR T790M mutation with mass spectrometry. We compared the characteristics of 24 T790M patients and 100 patients with no or a low-level T790M mutation. Results There were no differences in age, sex, histology, or initial stage between T790M and non/low T790M groups. However, there were significantly more never-smokers in the T790M group (P = 0.017). Brain metastasis was also more common in the T790M group (P = 0.036). The response rates to platinum, taxane, gemcitabine, and pemetrexed did not differ between the two groups. In the T790M group, the response rates were not significantly different among the four cytotoxic drugs (P = 0.809). The median time to progression during EGFR-TKI therapy was shorter in the T790M group than in the non/low T790M group (4.1 vs 11.5 months, respectively; P < 0.001). The median overall survival from the start of first-line treatment of advanced disease was similar in both groups (31.5 vs 36.0 months, respectively; P = 0.310). Conclusions The clinical features of EGFR T790M-mutant lung cancer were similar to those of sensitive EGFR-mutant lung cancer, except for the overrepresentation of never smokers and brain metastasis.
    Clinical Lung Cancer 09/2014; 16(1). DOI:10.1016/j.cllc.2014.09.002 · 3.22 Impact Factor
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    ABSTRACT: Background. The efficacy of ventriculolumbar perfusion (VLP) chemotherapy with methotrexate (MTX) was evaluated for treatment of leptomeningeal carcinomatosis (LMC). Methods. The primary outcome was the response rate of increased intracranial pressure (ICP), which was available for comparison from historical data on conventional intraventricular chemotherapy. Secondary endpoints were response rates of other LMC symptoms and overall survival of patients. Artificial cerebrospinal fluid (CSF) premixed with MTX was continuously perfused intraventricularly through a preinstalled intraventricular reservoir and drained via lumbar catheter for 72 hours. The VLP was repeated twice at 3-day intervals for each cycle. Results. Forty-five of 65 patients had increased ICP, and 32 patients (71%) showed response after VLP chemotherapy, including 31 patients with normalization of ICP. Altered mentation improved in 7 of 21 patients (33%). Cauda equina symptoms responded in 5 of 27 patients (19%), including 4 patients who became ambulatory from a bedridden state. Median overall survival was 187 days, and the 1-year survival rate was 27%. All side effects, including nausea, vomiting, confusion, and sleep disturbance, were tolerable and transient except for two cases of CSF infection. Conclusion. VLP chemotherapy with MTX provided better control of increased ICP, improved symptom response, and prolonged survival at a cost of acceptable toxicity in patients with LMC.
    The Oncologist 09/2014; 19(10). DOI:10.1634/theoncologist.2014-0199 · 4.54 Impact Factor
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    ABSTRACT: BACKGROUND Epidermal growth factor receptor (EGFR) T790M mutation drives acquired drug resistance to EGFR tyrosine kinase inhibitors (EGFR-TKIs) in patients with EGFR-mutant lung cancer. However, it was reported that this mutation may exist before drug exposure. The objective of the current study was to evaluate whether the clinical outcomes are affected by the percentage of preexisting T790M mutations within a tumor.METHODS Pretreatment tissues were collected from 124 patients with advanced non-small cell lung cancer with sensitizing EGFR mutations that were detected by direct sequencing. Genotyping for EGFR T790M mutation was further performed using matrix-assisted laser desorption/ionization time-of-flight mass spectrometry. Patients who were positive for the T790M mutation were divided to 2 subgroups according to T790M mutant signal frequency.RESULTSThe T790M mutation was found in 31 patients (25.0%). The T790M mutation frequency at which the risk of disease progression after therapy with EGFR-TKIs begins to increase was estimated to be 3.2%. The patients with T790M-positive tumors had a shorter time to disease progression after treatment with EGFR-TKIs (median, 6.3 months vs 11.5 months; P < .001) and overall survival (median, 16.1 months vs 26.5 months; P = .065) compared with those with T790M-negative tumors. Among the T790M-positive patients, the patients with high T790M frequency (9 patients) were found to have a shorter time to disease progression (median, 2.4 months vs 6.7 months; P = .009) and overall survival (median, 9.1 months vs 18.7 months; P = .018) compared with those with low T790M frequency (22 patients).CONCLUSIONSA preexisting EGFR T790M mutation was noted in 25% of patients with EGFR-mutant lung cancer. Patients with a high T790M mutation frequency had worse clinical outcomes to EGFR-TKIs than patients with a low T790M mutation frequency. Cancer 2014. © 2014 American Cancer Society.
    Cancer 07/2014; 120(14). DOI:10.1002/cncr.28711 · 4.90 Impact Factor
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    ABSTRACT: To evaluate the feasibility of high-resolution MRI (HR-MRI) for diagnosing intracranial vertebrobasilar artery dissection (VBD) and to identify the most useful imaging findings suggesting dissection.
    European Radiology 07/2014; 24(12). DOI:10.1007/s00330-014-3296-5 · 4.34 Impact Factor
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    Jin Soo Lee, Hong Gyun Lee
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    ABSTRACT: Weakening of trunk muscles in stroke patients hinders functional ability, safety and balance. To confirm whether strengthening trunk muscles could facilitate rehabilitation of stroke patients, we investigated the effectiveness of sling exercise therapy (SET) using closed kinetic chain exercises to activate trunk muscles and improve balance in stroke patients. [Subjects and Methods] Twenty stroke patients with chronic hemiplegia were equally divided into 2 groups, a SET group and a control group that performed regular exercises on a mat with the assistance of a table. Patients in both groups exercised for 30 min, three times per week for 4 weeks. Trunk muscle activity was measured using surface electromyography, whereas balance was measured using the Berg Balance Scale, Frailty and Injuries Cooperative Studies of Intervention Technique, Timed Up & Go test, and BioRescue before and after the 4-week experimental period. [Results] Trunk muscle activity and balance before and after intervention in both groups were significantly different. However, no significant differences were observed between the 2 groups. [Conclusion] Although SET was not more effective than regular exercise, significant improvement was observed before and after SET. Therefore, SET can be considered effective in strengthening trunk muscles in stroke patients with chronic hemiplegia.
    Journal of Physical Therapy Science 05/2014; 26(5):655-9. DOI:10.1589/jpts.26.655 · 0.20 Impact Factor

Publication Stats

5k Citations
982.93 Total Impact Points


  • 2015
    • Catholic University of Korea
      • Department of Internal Medicine
      Sŏul, Seoul, South Korea
  • 2003–2015
    • Ajou University
      • • Department of Medicine
      • • Department of Neurology
      Sŏul, Seoul, South Korea
    • National Cancer Center Korea
      • • Lung Cancer Branch
      • • Specific Organs Cancer Branch
      Kōyō, Gyeonggi-do, South Korea
  • 2010–2014
    • Inha University
      • Department of Internal Medicine
      Chemulpo, Incheon, South Korea
    • Kosin University
      Tsau-liang-hai, Busan, South Korea
    • Chungnam National University
      • Department of Advanced Organic Materials and Textile System Engineering
      Daiden, Daejeon, South Korea
  • 2007–2014
    • Inha University Hospital
      Sinhyeon, Gyeongsangnam-do, South Korea
    • Seoul National University
      • Cancer Research Institute
      Seoul, Seoul, South Korea
  • 2013
    • The Seoul Institute
      Sŏul, Seoul, South Korea
  • 2012
    • Seoul National University Bundang Hospital
      • Department of Neurosurgery
      Seoul, Seoul, South Korea
  • 2011–2012
    • Yale-New Haven Hospital
      New Haven, Connecticut, United States
    • Yonsei University Hospital
      Sŏul, Seoul, South Korea
  • 2006–2011
    • Yonsei University
      • Department of Materials Science and Engineering
      Sŏul, Seoul, South Korea
    • Korean Institute of Geoscience and Mineral Resources
      • Geologic Environment Division
      Sŏul, Seoul, South Korea
  • 2003–2011
    • Pohang University of Science and Technology
      • Department of Electronic and Electrical Engineering
      Geijitsu, Gyeongsangbuk-do, South Korea
  • 2002–2010
    • Korea Research Institute of Chemical Technology
      Daiden, Daejeon, South Korea
    • Sogang University
      • Department of Chemistry
      Sŏul, Seoul, South Korea
  • 2009
    • Hanyang University
      • Division of Materials Science and Engineering (MSE)
      Sŏul, Seoul, South Korea
  • 2008
    • Gyeongsang National University
      • Department of Neurosurgery
      Shinshū, South Gyeongsang, South Korea
  • 1998–2008
    • University of Texas MD Anderson Cancer Center
      • • Division of Radiation Oncology
      • • Department of Thoracic Head Neck Medical Oncology
      Houston, Texas, United States
  • 2004
    • Korea University
      • Division of Infectious Diseases
      Sŏul, Seoul, South Korea
    • Kyung Hee University
      • Advanced Display Research Center
      Sŏul, Seoul, South Korea
  • 2000
    • Medical College of Wisconsin
      Milwaukee, Wisconsin, United States
  • 1994
    • Houston Zoo
      Houston, Texas, United States