Sun Jin Sym

Gachon University, Seongnam, Gyeonggi, South Korea

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Publications (54)111.47 Total impact

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    ABSTRACT: The purpose of this study was to evaluate the prognostic value of metabolic tumor volume (MTV) measured by (18)F-fluorodeoxyglucose positron emission tomography-computed tomography (FDG-PET/CT) in patients with diffuse large B-cell lymphoma (DLBCL) treated with rituximab-containing immunochemotherapy.
    Nuclear medicine and molecular imaging. 09/2014; 48(3):187-95.
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    ABSTRACT: The aim of the current study is to evaluate the prognostic value of anemia, an easy to estimate parameter in patients with diffuse large B-cell lymphoma (DLBCL) treated with rituximab plus cyclophosphamide, doxorubicin, vincristine, and prednisolone (R-CHOP) immunochemotherapy. A total of 157 patients with newly diagnosed DLBCL treated with ≥ 1 cycle of R-CHOP were included. Hemoglobin level without red cell transfusion within seven days before initiation of treatment was chosen as a parameter of baseline cancer-induced anemia (CIA). To investigate the clinical significance of chemotherapy-induced anemia (CTIA) and its recovery after completion of treatment, 87 patients in complete remission for ≥ 6 months from the time of the last cycle of R-CHOP were grouped and analyzed separately. Patients with a CIA of hemoglobin < 10 g/dL showed inferior event-free and disease-free survival compared to those with hemoglobin ≥ 10 g/dL. This finding was observed irrespective of the status of pre-treatment bone marrow involvement. In multivariate analysis, hemoglobin < 10 g/dL was found to be an international prognostic index-independent prognostic factor. Risk of relapse was significantly higher for patients who were still anemic at six months after R-CHOP, compared to those who achieved complete recovery from CTIA within six months.This article is protected by copyright. All rights reserved.
    Cancer Science 09/2014; · 3.48 Impact Factor
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    ABSTRACT: Introduction In patients with non-small cell lung cancer (NSCLC), the predictive value of rare epidermal growth factor receptor (EGFR) exon 20 mutations in determining a patient's response to EGFR tyrosine kinase inhibitor (TKI) treatment is unclear. Patients and Methods We reviewed data for NSCLC patients harboring EGFR exon 20 mutations from two hospitals in Korea. EGFR mutations were analyzed using directional sequencing. Results We identified eight patients carrying EGFR exon 20 mutations, seven of whom had insertional mutations. Three patients carried previously unreported insertional mutations. Among six patients who were treated with EGFR TKI, one showed stable disease and three showed primary resistance. Response evaluations were not performed for the other two patients because of their clinical deterioration. Conclusions EGFR exon 20 insertional mutations, including three that were previously unreported, were associated with the poor response of patients to TKI treatment.
    Investigational New Drugs 08/2014; · 3.50 Impact Factor
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    ABSTRACT: Genexol-PM is a Cremorphor EL (CrEL)-free polymeric micelle formulation of paclitaxel that allows higher-dose administration with less hypersensitivity. This study was designed to evaluate the efficacy and safety of Genexol-PM and gemcitabine combination in advanced non-small cell lung cancer patients as a first-line treatment.
    Cancer Chemotherapy and Pharmacology 06/2014; · 2.80 Impact Factor
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    ABSTRACT: The aim of this study is to explore the association of Ki-67 and p53 expression with prognosis in non-small cell lung cancer (NSCLC) patients who underwent curative resection. We retrospectively identified 116 consecutive patients with stages I-III NSCLC who underwent curative resection at a single center from January 2007 to December 2012. Ki-67 and p53 expression was assessed by immunohistochemistry. Data on clinicopathologic features and survival were collected retrospectively. Ki-67 expression in 109 samples and p53 expression in 115 patients were analyzed. According to the results, 108 patients (99 %) showed at least some expression of Ki-67. The median Ki-67 expression level was 30 %. Positive p53 expression was observed in 91 (79 %) patients. Higher Ki-67 expression (>40 %) was significantly more frequent in male (26 vs. 4 % in female, p = 0.002), ever-smoker (31 vs. 10 % in never-smoker, p = 0.024), and non-adenocarcinoma (30 vs. 11 % of adenocarcinoma, p = 0.012) patients. In univariable analysis, median disease-free survival (DFS) was shorter with higher Ki-67 expression (16.1 vs. 61.9 months in those with lower Ki-67 expression, p = 0.005), and p53 expression did not show an association with DFS. Among 42 patients with stage I NSCLC who did not receive adjuvant chemotherapy, DFS was significantly worse in patients with higher Ki-67 expression (2-year DFS rate 57 vs. 88 %, p = 0.018). In a Cox regression model, higher Ki-67 expression (>40 %) was a significant independent prognostic factor associated with poorer DFS (HR 2.9, 95 % CI 1.3-6.2) along with TNM stage and age. Higher Ki-67 expression (>40 %) showed an independent association with shorter DFS in NSCLC patients who underwent curative resection.
    Tumor Biology 04/2014; · 2.52 Impact Factor
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    ABSTRACT: Abstract This study aimed at evaluating the role of routine imaging versus symptom-directed unplanned early out-patient department (OPD) visits in patients with diffuse large B-cell lymphoma (DLBCL) in complete remission (CR) by analyzing the patterns and outcomes of OPD visits for disease monitoring. Patients with DLBCL in CR after treatment in the rituximab era with any OPD monitoring visit were analyzed. A total of 856 OPD visits were recorded: 501 visits were with routine imaging, 322 were without routine imaging, and 33 visits (3.9%) were unplanned early visits due to abnormal symptoms. Of the 106 analyzed patients, 15 experienced a relapse (median follow-up duration of 38.1 months). Routine imaging showed an unsatisfactory positive predictive value due to frequent false-positive visits, and a substantial number of patients with false-positive imaging underwent unnecessary biopsies or additional scans. Compared with planned OPD visits, unplanned early visits were highly related to relapse.
    Leukemia & lymphoma 01/2014; · 2.61 Impact Factor
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    ABSTRACT: Docetaxel, in combination with cisplatin or oxaliplatin, has demonstrated efficacy in advanced gastric cancer (AGC). This randomized, non-comparative phase II trial evaluated two weekly docetaxel-based regimens to determine which is the most promising in terms of efficacy and safety as a front-line therapy in AGC. Chemotherapy-naïve patients with measurable unresectable and/or metastatic gastric adenocarcinoma were randomly assigned to receive docetaxel (35 mg/m(2)) weekly on days 1 and 8 of a 21-day cycle plus either cisplatin (60 mg/m(2) on day 1) (wDP) or oxaliplatin (120 mg/m(2) on day 1) (wDO). Of the 77 randomly assigned patients, 76 patients (38 per arm) received one of the study treatments. Overall, response rate (ORR) was 37 % for wDP and 41 % for wDO. Median progression-free survival (PFS) was 4.9 and 4.4 months for wDP and wDO, respectively, and median overall survival (OS) was 9.7 and 12.3 months, respectively. Exploratory analyses showed no significant difference between wDP and wDO in terms of ORR (P = 0.707), PFS (P = 0.324), or OS (P = 0.581). The main grade 3 or 4 toxicity in the wDP and wDO groups was neutropenia (47 % in both groups). wDO was less associated with nausea (66 vs. 82 %) and vomiting (39 vs. 63 %), but more associated with peripheral neuropathy (68 vs. 39 %) than wDP. Rates of overall grade 3 or 4 adverse events were similar (wDP 66 vs. wDO 68 %). wDP and wDO were found to be equally active and tolerable as front-line treatments in AGC.
    Cancer Chemotherapy and Pharmacology 11/2013; · 2.80 Impact Factor
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    ABSTRACT: Background/Aims: Baseline serum lactate dehydrogenase (LDH) level is a well-known prognostic factor in patients with non-Hodgkin's lymphoma; however, its role beyond initial diagnosis has not yet been defined. Methods: This study was conducted as a retrospective analysis of patients with diffuse large B cell lymphoma (DLBCL) treated with R-CHOP21, who had undergone regular checks for LDH during immunochemotherapy (n = 119) and during the posttreatment follow-up period after complete remission (CR; n = 100). The 119 patients were classified into 4 groups according to their baseline and change in LDH level during treatment, and an analysis of tumor response and survival was performed. The value of LDH as a predictor for relapse was evaluated among the patients with regular follow-up visits after achieving CR. Results: An increased LDH level during immunochemotherapy had no impact on tumor response or survival, and only the LDH status 'before' treatment was a prognostic marker. The sensitivity, specificity, positive predictive value and negative predictive value of serum LDH for detecting relapse after CR were 47.4, 86.5, 9.3 and 98.3%, respectively. Conclusion: The measurement of LDH level beyond initial diagnosis has no clear benefit in predicting disease progression or relapse in patients with DLBCL treated with R-CHOP21.
    Acta Haematologica 08/2013; 130(4):305-311. · 0.89 Impact Factor
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    ABSTRACT: Although autologous and allogeneic hematopoietic stem cell transplantation (HSCT) are fundamentally different procedures, a tailored approach to bacterial bloodstream infection (BSI) according to the type of HSCT has not yet been suggested. We evaluated the characteristics of BSI after HSCT, with a focus on comparison of BSIs between recipients of autologous HSCT (auto-HSCT) and allogeneic HSCT (allo-HSCT). Among 134 patients (59 received allo-HSCT and 75 received auto-HSCT) who underwent HSCT, BSIs were reported earlier in patients who underwent auto-HSCT, compared with those who underwent allo-HSCT (mean 12.1 ± 3.4 days versus 32.8 ± 27.1 days, P = .006). Among patients receiving allo-HSCT, postneutrophil-engraftment bacterial BSI showed an association with grade ≥2 acute graft-versus-host disease (GVHD). In patients who underwent auto-HSCT, results of multivariate analysis showed that not receiving prophylactic antibiotics (P = .004) and having elevated serum C-reactive protein (P = .034) were risk factors of BSI. Elevated CRP (P = .01) and acute GVHD ≥ grade 2 (P = .002) were independent risk factors in patients who underwent allo-HSCT. Those differences originated mainly from the impact of acute GVHD-related postengraftment BSIs of patients who underwent allo-HSCT. To establish the best defense strategy against BSI, the distinctive natures of bacterial BSI after HSCT between auto-HSCT and allo-HSCT should be considered.
    Biology of blood and marrow transplantation: journal of the American Society for Blood and Marrow Transplantation 06/2013; 19(6):994–999. · 3.15 Impact Factor
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    ABSTRACT: PURPOSE: UGT1A1 genotypes are important when considering treatment with irinotecan-containing regimens. In this study, we determined the dose, efficacy, and tolerability of irinotecan according to UGT1A1 genotypes when combined with capecitabine in patients with metastatic colorectal cancer. METHODS: Patients with histologically confirmed metastatic adenocarcinoma of the colon or rectum were enrolled into a UGT1A1 genotype-directed dose-escalation trial of irinotecan plus fixed-dose capecitabine (2,000 mg/m(2)/day). The starting dose of irinotecan was different for each genotype group and ranged from 200 to 280 mg/m(2). Pharmacokinetic concentrations of irinotecan and metabolites were determined by LC/MS/MS. RESULTS: Fifty patients were genotyped for UGT1A1 *28 and *6, and grouped according to the numbers of defective alleles (DA): 0, 1, and 2. Plasma concentrations of irinotecan, SN-38, and SN-38G were measured. The maximum tolerated dose of irinotecan was 350 mg/m(2) for the 0 and 1 DA groups, and 200 mg/m(2) for the 2 DA group. For the 0, 1, and 2 DA groups, mean AUClast ratios of SN-38G to SN-38 were 7.72, 5.71, and 2.72 (P = 0.0023) and relative dose intensities at recommended dose were 85, 83, and 97 %. CONCLUSION: Irinotecan dosing based on UGT1A1*28 and *6 is feasible, and higher doses of irinotecan can be safely administered in patients with 0 or 1 DA, compared to those with 2 DA.
    Cancer Chemotherapy and Pharmacology 04/2013; · 2.80 Impact Factor
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    ABSTRACT: BACKGROUND: The aim of this study was to evaluate the efficacy of irinotecan (CPT-11) monotherapy and CPT-11 plus 5-fluorouracil (5-FU)/leucovorin (LV) combination (mFOLFIRI) as second-line treatment in patients with advanced gastric cancer (AGC). METHODS: A total of 59 patients were randomly assigned to either CPT-11 (150 mg/m(2) iv on day 1) or mFOLFIRI (CPT-11 150 mg/m(2) plus LV 20 mg/m(2) on day 1 followed by 5-FU 2,000 mg/m(2) over 48 h), every 2 weeks. The primary end point was objective response rate (ORR). RESULTS: Following random assignment, 29 patients received CPT-11 and 30 patients mFOLFIRI. The ORR was 17.2 % [95 % confidence interval (CI) 3.4-30.9] and 20.0 % (95 % CI 5.6-34.3) for the CPT-11 and mFOLFIRI arms, respectively (P = 0.525). There was no significant difference in median progression-free survival: 2.2 months (95 % CI 0.2-4.3) for CPT-11 versus 3.0 months (95 % CI 2.0-3.7) for mFOLFIRI (P = 0.481) or in median overall survival: 5.8 months (95 % CI 3.0-8.7), compared with 6.7 months (95 % CI 5.3-8.2) (P = 0.514). Grade 3/4 toxicity was observed in 21 and 28 events in the CPT-11 and mFOLFIRI arms, respectively. CONCLUSIONS: Although this study had a small sample size and limited statistical power, CPT-11 monotherapy and mFOLFIRI appear to be equally active and tolerable as second-line chemotherapy for AGC. The addition of 5-FU/LV to CPT-11 did not significantly improve efficacy.
    Cancer Chemotherapy and Pharmacology 11/2012; · 2.80 Impact Factor
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    Dataset: Supp Cancer
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    ABSTRACT: PURPOSE: The purpose of this study is to evaluate risk factors for infusion-related reaction (IRR) following rituximab administration in patients with B cell non-Hodgkin lymphoma. METHODS: A retrospective analysis was conducted of patients with newly diagnosed B cell lymphoma who have received rituximab-included immunochemotherapy with appropriate premedication and commonly used schedule of infusion rate. IRRs were graded by review of the patients' electronic medical record according to the Common Terminology Criteria for Adverse Events version 4.0. RESULTS: One hundred and sixty-nine patients were included in the analysis and most of the patients (150; 88.8 %) had diffuse large B cell lymphoma (DLBCL). Thirty-six patients (21.3 %) had any grade of IRRs: 23 patients were grade (G) 1 (13.6 %), 13 had ≥G2 IRRs (7.7 %), and only 4 had ≥G3 IRRs (2.4 %). All except one patient had IRR during the first cycle and only two had repetitive IRR thereafter. Bone marrow (BM) involvement was the strongest risk factor for IRR in multivariable analysis (odds ratio 4.06, 95 % confidence interval 1.67-9.89; p = 0.002). A subgroup analysis confined to patients with DLBCL showed very similar results when compared with the entire population, and patients with DLBCL who had ≥G2 IRR showed shorter event-free and overall survival when compared to those who did not. CONCLUSIONS: BM involvement is predictive of occurrence of IRR during rituximab administration in patients with B cell lymphoma. More intensive premedication and careful observation for IRR during rituximab administration are required for patients with B cell lymphoma who have BM involvement.
    Supportive Care in Cancer 10/2012; · 2.09 Impact Factor
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    ABSTRACT: In order to evaluate prognostic value of CD99 expression in patients with diffuse large B-cell lymphoma (DLBCL) who underwent treatment with rituximab-CHOP immunochemotherapy, immunohistochemistry for CD99/CD10/BCL-2/BCL-6/MUM-1 was performed on nodal DLBCL specimens from 70 patients. Patients were classified as either germinal center B-cell (GCB) subtype or non-GCB subtype according to the Muris algorithm. A superior 2-year event-free survival (EFS) was observed in patients with the GCB subgroup, compared to those with the non-GCB subgroup (p = 0.034). The distribution of CD99 expression (29 patients; 41.4 %) did not show deviation according to subtype and was not prognostic for survival in the entire patient population. Among patients with the GCB subgroup, better EFS and overall survival (OS) were observed in CD99+ patients, compared to CD99- patients. Conversely, among patients with the non-GCB subgroup, inferior EFS and OS were reported in CD99+ patients. Superior 2-year EFS (p = 0.004) and 2-year OS (p = 0.003) were observed in patients with GCB/CD99+ and non-GCB/CD99- compared to the others, and the combination classification was found to be an independent prognostic factor.
    Annals of Hematology 08/2012; · 2.87 Impact Factor
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    ABSTRACT: We wanted to evaluate the outcomes of cervical cancer patients with supraclavicular lymph node (SCLN) involvement and who received radiation therapy (RT) combined with chemotherapy. From August 2001 to April 2009, nine cervical cancer patients with SCLN involvement were treated by RT and cisplatin-based chemotherapy. Most of the patients (8/9, 88.9%) also had a positive para-aortic lymph node (PALN). The RT field was designed to include the whole pelvis, the involved PALNs and the SCLN area. The median SCLN RT dose was 66.6 Gy (range, 60 to 70 Gy). The median follow-up period was 61 months (range, 13 to 98 months). The 3- and 5-year overall survival rates were 66.7% and 55.6%, respectively and the 3- and 5-year progression-free survival rates were 66.7% and 44.4%, respectively. The acute hematologic toxicities according to the criteria of Radiation Therapy of Oncology Group (RTOG) were G1/2 leucopenia in 3 (33.3%), G3/4 leukopenia in 6 (66.7%), G1/2 anemia in 7 (77.8%), G3 anemia in 1 (11.1%), G2 thrombocytopenia in 2 (22.2%), and G3/4 thrombocytopenia in 2 (22.2%). Within 6 months after RT, most of the patients (5/6, 83.3%) recovered from the G3/4 leukopenia, except for 1 patient who received chemotherapy after completing RT due to subsequent bone metastasis. For patients with advanced cervix cancer and SCLN involvement, RT with chemotherapy as active therapy can be expected to provide favorable results, although there is an increased risk of G3/4 hematologic toxicity.
    Journal of Gynecologic Oncology 07/2012; 23(3):159-67. · 1.73 Impact Factor
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    ABSTRACT: This study was performed to determine the recommended dose (RD) and dose-limiting toxicity (DLT) associated with epirubicin, oxaliplatin, and S-1 (EOS) combination therapy in patients with previously untreated advanced gastric cancer (AGC). Previously untreated patients with histologically proven metastatic AGC, with an ECOG performance status of 0-2, were enrolled in this study. A fixed dose of epirubicin (50 mg/m(2)) and oxaliplatin (130 mg/m(2)) was intravenously administered on day 1 of treatment, followed by oral S-1 administration twice daily on days 1-14. The S-1 dose was escalated according to the following schedule: level I, 35 mg/m(2); level II, 40 mg/m(2); level III, 45 mg/m(2); Level IV, 50 mg/m(2). Each cycle was repeated every 21 days. DLTs were evaluated during the first two cycles of treatment. Nineteen patients with a median age of 53 years (range, 40-71 years) were enrolled in this study. One case of DLT (grade 4 neutropenia lasting more than 5 days) developed from among the six dose level II patients, while 2 DLTs (grade 3 diarrhea and nausea) were observed among the 4 dose level III patients. Based on these results, dose level II was determined as the RD. Of the 13 patients with measurable lesions, eight achieved partial response, three showed stable disease, and the objective response rate was 61.5 % (95 % confidence interval (CI), 13.3-66.6 %). The median progression-free survival and overall survival of all patients was 6.8 months (95 % CI, 1.4-9.5 months) and 13.3 months (95 % CI, 1.9-24.6 months), respectively. The RD of the EOS regimen in patients with previously untreated AGC was 50 mg/m(2) of epirubicin and 130 mg/m(2) of oxaliplatin on day 1, with administration of 40 mg/m(2) of S-1 twice a day on days 1-14 for each 21-day cycle. The EOS regimen described produced promising results.
    Cancer Chemotherapy and Pharmacology 06/2012; 70(2):277-84. · 2.80 Impact Factor
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    ABSTRACT: PURPOSE: To evaluate the safety and efficacy of neoadjuvant chemoradiation with oxaliplatin and 5-fluorouracil (5-FU) in advanced mid-to-lower rectal cancer. METHODS: This was a single-arm, open-label phase II study conducted between August 2008 and August 2010. Thirty-one patients (n = 31) with clinical stage T3/T4 or lymph node positive rectal adenocarcinoma located in the middle or lower rectum without metastasis were enrolled onto the study. Data were analyzed according to the intention-to-treat principle. RESULTS: Thirty-one patients were enrolled into the study. Six patients (19.4%) experienced grade 3 diarrhea. Grade 2 nausea and vomiting occurred in 5 and 2 patients, respectively. Severe neurotoxicity was not observed. Grade 1 sensory neuropathy occurred in 10 patients (32.3%). Sphincter-saving surgery was performed in 29 patients (93.5%). The mean distance of the tumor from the anal verge was 4.9 cm. Anastomotic leakage occurred in 4 of 29 (13.8%) patients. The circumferential resection margin was involved in 2 patients (6.5%). Overall, 23 patients (77.4%) responded to treatment. The complete pathologic response (ypCR) rate was 12.9%. There was no death secondary to toxicity, and the mean follow-up time was 12.3 months. CONCLUSION: The overall toxicity of oxaliplatin and continuous 5-FU/leucovorin infusion in combination with radiation was well tolerated. Neoadjuvant chemoradiation for patients with locally advanced rectal cancer was associated with higher rates of sphincter preservation and downstaging, but did not significantly increase ypCR. The impact of this neoadjuvant chemoradiation regimen on survival will be determined by longer follow-up studies.
    International Journal of Clinical Oncology 02/2012; · 1.41 Impact Factor
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    ABSTRACT: Extranodal natural killer/T-cell lymphoma, nasal type (nasal ENKTL) is a distinct clinicopathologic entity of lymphoid tumors with variable size and differentiation of tumor cells. Nasal ENKTL is related to infection of the tumor cells with Epstein-Barr virus (EBV) and virtually all cases contain monoclonal episomal EBV DNA and detectable EBV encoded small nuclear RNAs (EBERs). Several clinical factors are known for their relation to the prognosis, but histopathologic prognostic factors of nasal ENKTL have not yet been well established. We evaluated the prognostic value of the longest nuclear diameter of EBER+ tumor cells (NDTC) along with the result of CD30 expression. Twenty two patients with newly diagnosed nasal ENKTL were evaluated regarding clinicopathologic characteristics. NDTC was measured using a computerized image analysis system. The results were expressed as the mean diameter of ≥ 50 cells in a patient. Median of the mean NDTC of the patients was 7.32 μm (5.15-11.27). Patients with larger mean NDTC (≥ 7.35 μm) had a poorer event-free survival (EFS) than those with smaller mean NDTC (<7.35 μm; p = 0.024) and had a tendency of inferior overall survival (OS) (p = 0.08). Patients with CD30 expression had a inferior EFS (p = 0.018) and OS (p = 0.011) compared those without CD30 expression. The NDTC of EBV infected tumor cell and CD30 expression had relation to survival in the current exploratory analysis.
    International journal of clinical and experimental pathology 01/2012; 5(9):939-47. · 2.24 Impact Factor
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    ABSTRACT: The relationship between histopathologic characteristics and treatment outcomes in patients with diffuse large B-cell lymphoma (DLBCL) treated with rituximab-based immunochemotherapy needs re-evaluation. Patients with newly diagnosed DLBCL treated with rituximab, cyclophosphamide, doxorubicin, vincristine, and prednisolone (R-CHOP) were evaluated with respect to clinical characteristics, treatment efficacy, and survival. Immunohistochemistry of bcl-2, CD10, bcl-6, and MUM-1 was performed and patients were sub-classified as germinal center B-cell-like (GCB) or non-GCB type according to the Hans algorithm. There was no significant difference in overall survival (OS) between patients with GCB and those with non-GCB. Although there was no significant difference in OS between high-intermediate and high risk groups as classified by the standard International Prognostic Index (IPI; p = 0.50), all three groups with the revised IPI had a clear-cut separation for event-free survival and OS. The revised IPI better predicted survival than did the standard IPI in patients with DLBCL treated with R-CHOP. The Hans classification had no prognostic value.
    Leukemia & lymphoma 06/2011; 52(10):1904-12. · 2.61 Impact Factor

Publication Stats

319 Citations
111.47 Total Impact Points

Institutions

  • 2009–2013
    • Gachon University
      • Department of Internal Medicine
      Seongnam, Gyeonggi, South Korea
  • 2010
    • Incheon St. Mary’s Hospital, Catholic Medical Center
      Bucheon, Gyeonggi Province, South Korea
  • 2008–2010
    • Ulsan University Hospital
      Urusan, Ulsan, South Korea
    • University of Ulsan
      Urusan, Ulsan, South Korea
  • 2008–2009
    • Asan Medical Center
      • Department of Oncology
      Seoul, Seoul, South Korea