Hyuk-Chan Kwon

Gyeongsang National University, Chinju, South Gyeongsang, South Korea

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Publications (91)233.11 Total impact

  • [Show abstract] [Hide abstract]
    ABSTRACT: This phase II study was designed to assess the safety and efficacy of a modified FOLFIRI regimen (irinotecan with bi-weekly, low dose leucovorin (ldLV) and bolus and continuous infusion with 5-fluorouracil (5-FU)) as a salvage therapy for patients with advanced or metastatic gastric cancer. Patients were treated with irinotecan 150 mg/m(2) on day 1 and received ldLV 20 mg/m(2) followed by 5-FU 400 mg/m(2) (bolus) and 5-FU 600 mg/m(2) (22 h continuous infusion) on days 1 and 2 every 14 days. A total of 36 patients were assigned to treatment. The median patient age was 55 years (range 31-70), and 55.6% (20/36) of the patients had performance status (ECOG) of 0 or 1. The median follow-up duration was 15.5 (range 2.6-36.4) months. Of the 30 patients evaluated for their tumor response, three achieved a partial response, with an overall response rate of 10.0% (95% CI 0.0-21.0%). Eleven patients (36.7%) showed stable disease. The median time to progression was 3.3 (95% CI 2.0-4.6) months, and the median overall survival time was 10.9 (95% CI 6.1-15.7) months. The median number of cycles of modified FOLFIRI treatment was 3 (range 1-9 cycles). Grade III or IV neutropenia was observed in 23 cycles (17.6%), and febrile neutropenia occurred in three cycles (2.3%). Grade III nausea/vomiting was found in one patient (2.8%). There was one episode of UGI bleeding, but there were no treatment-related deaths. The modified FOLFIRI regimen described here appears a safe and feasible salvage therapy in advanced gastric cancer patients.
    Japanese Journal of Clinical Oncology 11/2007; 37(10):744-9. · 1.90 Impact Factor
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    ABSTRACT: Intestinal marginal zone B-cell lymphoma of the MALT type (I-MZL) is a relatively uncommon form of lymphoma. Twenty-seven patients with histologically-confirmed I-MZL were analyzed. The patients initially presented with abdominal pain (62.9%), and diarrhea (22.2%). The most common involved site was the ileo-caecal area (40.7%). Musshoff's stage I(E), II(E)1, II(E)2, III(E) and IV were present in 44%, 15%, 11%, 7.4% and 22% respectively. Sixty-three percent were in the low-risk group according to the Follicular Lymphoma International Prognostic Index. Complete response and partial response were achieved in 82% and 4% patients. The estimated 5-year overall survival (OS) and progression-free survival (PFS) rates were 86% and 54%. Stage > or = II(E)2 was determined to be a poor prognostic factor for PFS and OS. I-MZL commonly manifests in an early-stage, low-risk state and tends to respond well to local and systemic treatment with favorable prognosis. I-MZL tends to be an indolent disease - characterized by prolonged survival with frequent relapses, similarly to other site MZLs.
    European Journal Of Haematology 10/2007; 79(4):287-91. · 2.55 Impact Factor
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    ABSTRACT: Mesenchymal chondrosarcoma is a rare cartilaginous neoplasm of an extraskeletal origin, and this predominately occurs in the head and neck, and also in the lower extremities. Fewer than twenty cases of cardiac mesenchymal chondrosarcoma have so far been reported on. For the most part, the results of treatment for patients with this condition have been dismal. In this study, we describe a case of cardiac mesenchymal chondrosarcoma that responded to chemotherapy following surgical biopsy. A 46-year-old man was referred for evaluation of his pleural effusions in both lungs. Chest computed tomography revealed an ovoid-shaped mass in the posterior wall of the patient's left atrium. The echocardiogram revealed a large ovoid-shaped immobile mass (11x6 cm(2)) in the pericardiac space, which was attached to the posterior wall of the left atrium. Emergency pericardiostomy with closure thoracostomy was performed. Seven days later, a thoracotomy was performed for reduction and diagnosis of the cardiac mass. The pathological diagnosis was extraskeletal mesenchymal chondrosarcoma of the heart.. Postoperative chemotherapy was performed for the huge remaining mass with a combined regimen of etoposide, ifosfamide and cisplatin. After 6 cycles, the patient showed a partial response without symptoms. Although cardiac mesenchymal chondrosarcoma has been reported to be chemotherapy-resistant with a short survival duration, chemotherapy may prove to be an effective treatment modality.
    Cancer Research and Treatment 09/2007; 39(3):131-3. · 1.96 Impact Factor
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    ABSTRACT: Tumor budding along the invasive margin is known to be associated with biological behavior in colorectal carcinoma. The aims of this study were to explore if the semiquantitative assessment of tumor budding in rectal cancers correlates with oncological behavior and to appraise if the tumor budding is valid as a pathological parameter in distinguishing tumors with higher malignancy potential from those with lower one for prognostic stratification. Surgical specimens from 244 patients with well- or moderately differentiated rectal carcinoma were retrieved to assess the intensity of tumor budding at the invasive margin. Intensities were divided semiquantitatively into four groups based on quartiles, and the 5-year disease-free survivals (DFS) were analyzed to search for a cutoff point of prognostic stratification. The cutoff of the intensity considered to be the best indicator for dividing patients into subgroups with different DFS was between quartiles 3 and 4, but this survival difference in subgroups in either side of the cutoff was significant only in stage-III disease [5-year DFS, 62.1 vs 35.1%; p = 0.0023; 95% confidence interval (CI), 0.1824-0.6919]. Based on multivariate analysis, the intensity of budding proved to be an independent variable associated with DFS (hazard ratio, 2.005; p = 0.0086; 95% CI, 1.021-3.934). When scores were given to grade of budding (lower, 0; higher, 1) and N stage (N1, 0; N2, 1) in stage III, a better prognostic stratification in terms of the 5-year DFS was obtained than the American Joint Committee on Cancer nodal staging only (0 vs 1 vs 2, 66.5 vs 42.6 vs 29.2%; p = 0.0101). Quantitative assessment of tumor budding is a reliable biological prognostic variable to identify higher malignancy potential. Scoring system using tumor budding and N stage showed better prognostic stratification in stage-III rectal carcinoma. A prospective evaluation would confirm the clinical significance of tumor budding for prognostic stratification.
    International Journal of Colorectal Disease 09/2007; 22(8):863-8. · 2.24 Impact Factor
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    ABSTRACT: Nongastric marginal zone B-cell lymphoma (NG-MZL) is a relatively uncommon indolent lymphoma. From 1990 to 2005, a total of 247 patients with histologically confirmed NG-MZL were analyzed. Ann Arbor stage I/II disease was present in 78% (167 out of 215). One hundred eighty-six patients out of two hundred eight were categorized into the low/low-intermediate risk group (89%) according to International Prognostic Index (IPI). Eighty percent (172/215) were in low risk group according to Follicular Lymphoma International Prognostic Index (FLIPI). Complete and partial remissions (CR and PR) were achieved in 140 (92.7%) and 8 (5.3%) of the 151 stage I/II patients. Especially, radiation containing treatment achieved 96% CR rate (108 out of 113). In 38 patients with stage III/IV, CR and PR were achieved in 17 (44.7%) and 11 (26.3%), respectively. The estimated five-year overall survival (OS) and progression-free survival (PFS) were 93.8% and 70.1%, respectively. Although anthracycline-containing regimen could achieve higher CR rate, it did not improve PFS. Stage III/IV, low hemoglobin, poor performance status, high/high-intermediate IPI, poor risk FLIPI, and nodal MZL were poor prognostic factors for PFS. NG-MZL is an indolent disease. FLIPI has strong power to predict the prognosis of NG-MZL.
    American Journal of Hematology 07/2007; 82(6):446-52. · 4.00 Impact Factor
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    ABSTRACT: The aim of this study was to evaluate the prognostic significance of the lymph node ratio between metastatic and examined lymph nodes (LNR) in patients with stage III colon cancer. A review was made of 201 patients (106 men) with stage III colon cancer of R0 resection. Lymph node (LN) disease was stratified both by the American Joint Committee on Cancer and the International Union Against Cancer nodal staging system (pN) and by quartiles of the LNR. Survival curves were made by Kaplan-Meier analysis and assessed by the log rank test. Multivariate analysis was performed by the Cox proportional hazard model. Patients ranged in age from 22 to 82 (median, 59) years with median follow-up of 52 (range, 13-96) months. The LNR increased as a function of the number metastatic LNs (P < .0001; 95% confidence interval [95% CI], .7155-.8265). Cutoff points of LNR quartiles to be the best separating patients with regard to 5-year disease-free survival (DFS) were between quartile 1 and 2, and between 3 and 4 (pNr1, 2, and 3); the 5-year DFS according to such stratification was 83.6%, 61.1%, and 20% in pNr1, pNr2, and pNr3, respectively (P < .0001). The Cox model identified the pNr as the most statistically significant covariate: pNr2 was three times (95% CI, 1.407-6.280) and pNr3 eight times more risky than pNr1 (95% CI, 3.739-18.704). Ratio-based LN staging, which reflects the number of LNs examined and the quality of LN dissection, is a potent modality for prognostic stratification in patients with LN-positive colon cancer.
    Annals of Surgical Oncology 06/2007; 14(5):1712-7. · 4.12 Impact Factor
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    ABSTRACT: To evaluate the therapeutic activity and safety of paclitaxel and cisplatin combination chemotherapy in patients with advanced or metastatic gastric cancers that are unresponsive to primary chemotherapy. Advanced or metastatic gastric cancer patients unresponsive to first line chemotherapy were entered into this trial. The treatment regimen consisted of paclitaxel, 175 mg/m(2) by 3-hour infusion on day 1, and cisplatin, 60 mg/m(2) by 1 hour infusion on day 1, with the treatment repeated every 3 weeks. 37 patients were entered in this study, with 32 fully evaluable for response. 4 (13%), 13 (40%) and 15 (47%) patients achieved a partial response, stable disease and progressed, respectively. The median time to progression was 4.0 months (95% CI: 2.0 approximately 6.0 months), and the median overall survival was 12.6 months (95% CI: 5.5 approximately 19.7 months), with a 1-year survival rate of 54%. Of a total of 135 cycles of chemotherapy, grades 3 and 4 hematological toxicities were neutropenia (14%) and anemia (3%). Grade >or=2 neuropathy was observed in 6 patients (17%). The combination of paclitaxel and cisplatin is an effective and tolerable salvage treatment modality for advanced gastric cancer.
    Cancer Research and Treatment 03/2007; 39(1):6-9. · 1.96 Impact Factor
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    ABSTRACT: To determine the activity and toxicities of a low dose leucovorin (ldLV) plus fluorouracil (5-FU) regimen, combined with oxaliplatin administered fortnightly (modified FOLFOX-4), as a first-line therapy for patients with advanced gastric cancer. Patients were treated with cycles of oxaliplatin 85 mg/m2 on day 1 plus LV 20 mg/m2, followed by 5-FU a 400 mg/m2 bolus and a 22 hour continuous infusion of 600 mg/m2 5-FU on days 1 - 2 every two week intervals. Forty-five patients were enrolled in this study. Forty-two patients were assessable for response. One of the 42 patients demonstrated complete response, and 20 partial responses, and overall response rate of 50%. The median time to progression and overall survival time were 7.7 months (95% CI: 3.6 - 11.9 months) and 11.2 months (95% CI: 9.1 - 13.3 months), respectively. Major hematologic toxicities included grade 1 - 2 anemia (39.7%), neutropenia (30.4%) and grade 3 - 4 neutropenia (10.9%). Twelve cycles were associated with neutropenic fever. The most common non-hematological toxicities were grade 2 nausea/vomiting (20%). There was no treatment related death. The modified FOLFOX-4 regimen was found to be a safe and effective first line therapy in advanced gastric cancer.
    Acta Oncologica 02/2007; 46(3):336-41. · 2.87 Impact Factor
  • The Korean journal of hematology 01/2007; 42(4).
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    ABSTRACT: Nodal marginal zone B-cell lymphoma (NMZL) is a relatively uncommon type of lymphoma. Because of the rarity, the natural history and the optimal treatment modality have not been well defined. Therefore, we performed a retrospective analysis of the clinical features and treatment outcomes of NMZL. Thirty-six patients who were histologically diagnosed as NMZL were included in the analysis. Fifty-three percent of the patients had localized disease (stages I and II), and 21.2% (7/33) had bone marrow involvement at presentation. B symptom was present in only three patients (8.3%). Most patients were categorized as low or low-intermediate risk group by international prognostic index (IPI) (77.1%). Majority (94.4%) of the patients with localized disease achieved complete remission (CR) after the initial treatment. Of the seven patients with disseminated disease, who were treated with anthracycline-based chemotherapy, four patients achieved CR. Of the seven patients who received nonanthracycline-based chemotherapy, no patient achieved CR. After the median follow-up duration of 36 months, the median progression-free survival (PFS) was 3.9 (95% CI; 2.9-5.6) years, and the estimated 5-year PFS and overall survival rates were 47.2 and 82.7%, respectively. The significant predictive factors for PFS were performance status, advanced stage, and follicular lymphoma IPI (FLIPI) in this study. This clinical feature is similar to FL rather than to MZL-MALT type.
    Annals of Hematology 12/2006; 85(11):781-6. · 2.87 Impact Factor
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    ABSTRACT: To assess the clinical pattern, the histopathological findings, the response to treatments, the recurrence pattern and the prognosis of malignant lymphoma in the ocular adnexa. This study was performed on 22 total eyes from 17 patients who were diagnosed with ocular adnexal malignant lymphoma. We retrospectively analyzed the medical records for patient information including the histological classification based on age, the gender of each patient, the symptoms and signs at the initial diagnosis, the presence of binocular invasion, the findings of the surgical biopsy, the clinical stage of each patient's tumor, and the treatment methods used and their effectiveness. The mean follow-up period was 24.8 months. The mean age of patients studied was 46.8 years old. Six females and 11 males were included in the study. Fifteen cases consisting of 20 total eyes represented extranodal marginal zone B cell lymphoma of mucosa-associated lymphoid tissue (MALT). Five of seven patients (71.4%) whose lymphoma occurred within the conjunctiva relapsed after irradiation or chemotherapy, and four of the relapsed patients were salvaged with further therapy. Extranodal marginal zone B cell lymphoma of mucosa-associated lymphoid tissue (MALT) constituted 88.2% of all lymphomas involving the ocular adnexa. Lymphoma in the ocular adnexa responded well to conventional treatment, but the recurrence rate of lymphoma in the conjunctiva was significantly high.
    Korean Journal of Ophthalmology 04/2006; 20(1):7-12.
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    ABSTRACT: Patients with natural killer T (NK/T) -cell lymphomas have poor survival outcome, and for this condition there is no optimal therapy. The purpose of this study was to design a prognostic model specifically for extranodal NK/T-cell lymphoma, which can identify high-risk patients who need more aggressive therapy. This multicenter retrospective study was comprised of 262 patients who were diagnosed with NK/T-cell lymphoma. After a median follow-up duration of 51.2 months, 5-year overall survival rate in 262 patients was 49.5%. Prognostic factors for survival were "B" symptoms (P = .0003; relative risk, 2.202; 95% CI, 1.446 to 3.353), stage (P = .0006; relative risk, 2.366; 95% CI, 1.462 to 3.828), lactate dehydrogenase (LDH) level (P = .0005; relative risk, 2.278; 95% CI, 1.442 to 3.598), and regional lymph nodes (P = .0044; relative risk, 1.546; 95% CI, 1.009 to 2.367). Of 262 patients, 219 had complete information on four parameters. We identified four different risk groups: group 1, no adverse factor; group 2, one factor; group 3, two factors; and group 4, three or four factors. The new model showed a superior prognostic discrimination as compared with the International Prognostic Index (IPI). Notably, the distribution of patients was balanced when a new model was adopted (group 1, 27%; group 2, 31%; group 3, 20%; group 4, 22%), whereas 81% of patients were categorized as low or low-intermediate risks using IPI. The newly proposed model for extranodal NK/T-cell lymphoma demonstrated a more balanced distribution of patients into four groups with better prognostic discrimination as compared with the IPI.
    Journal of Clinical Oncology 03/2006; 24(4):612-8. · 18.04 Impact Factor
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    ABSTRACT: To evaluate the efficacy and toxicity of postoperative chemoradiation using FP chemotherapy and oral capecitabine during radiation for advanced gastric cancer following curative resection. Thirty-one patients who had underwent a potentially curative resection for Stage III and IV (M0) gastric cancer were enrolled. Therapy consists of one cycle of FP (continuous infusion of 5-FU 1000 mg/m(2) on d 1 to 5 and cisplatin 60 mg/m(2) on d 1) followed by 4500 cGy (180 cGy/d) with capecitabine (1650 mg/m(2) daily throughout radiotherapy). Four wk after completion of the radiotherapy, patients received three additional cycles of FP every three wk. The median follow-up duration was 22.2 mo. The 3-year disease free and overall survival in this study were 82.7% and 83.4%, respectively. Four patients (12.9%) showed relapse during follow-up. Eight patients did not complete all planned adjuvant therapy. Grade 3/4 toxicities included neutropenia in 50.2%, anemia in 12.9%, thrombocytopenia in 3.2% and nausea/vomiting in 3.2%. Neither grade 3/4 hand foot syndrome nor treatment related febrile neutropenia or death were observed. These preliminary results suggest that this postoperative adjuvant chemoradiation regimen of FP before and after capecitabine and concurrent radiotherapy appears well tolerated and offers a comparable toxicity profile to the chemoradiation regimen utilized in INT-0116. This treatment modality allowed successful loco-regional control rate and 3-year overall survival.
    World Journal of Gastroenterology 02/2006; 12(4):603-7. · 2.55 Impact Factor
  • The Korean journal of hematology 01/2006; 41(1).
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    ABSTRACT: The matrix metalloproteinases (MMPs) are a family of proteolytic enzymes. MMPs are known to be involved in tumor invasion, and several have been implicated in tumor prognosis. The aim of this study was to evaluate the prognostic significances of the expressions of MMP-7 and -9 in rectal cancer. The tumor tissues of 87 patients with stage II or III rectal carcinoma that underwent potentially curative resection followed by postoperative adjuvant chemoradiation and 5-fluorouracil based chemotherapy, were investigated immunohistochemically using monoclonal antibodies against MMP-7 and MMP-9. Clinical information, including tumor grades, carcinoembryonic antigen (CEA) levels, and disease-free survival and overall survival were evaluated with respect to the expressions of MMP-7 and -9. Median follow-up duration was 53.2 months, and median patient age was 55±11 years (range 32~75). MMP-7 expression in tumor tissue was found to be significantly correlated with the presence of nodal metastasis (p=0.029), whilst MMP-9 expression correlated with depth of tumor invasion (p=0.019). No relationships were found between the expressions of MMP-7 or -9 and age, sex, tumor size, tumor grade, or CEA level. Univariate analysis showed that MMP-7 expression was associated with poor 5-year overall survival (12.8 months vs. 65.3 months, p=0.0405). Multivariate analysis confirmed that MMP-7 was independently associated with an adverse outcome (Relative risk: 1.415, p=0.027). However, MMP-9 expression was not found to be related to clinical outcome. MMP-7 expression in tumor tissue is associated with lymph node metastasis and a poor 5-year overall survival in rectal cancer patients.
    Cancer Research and Treatment 12/2005; 37(6):354-9. · 1.96 Impact Factor
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    ABSTRACT: The interferon-induced, double-stranded RNA-activated, protein kinase (PKR) is a key regulator of translational initiation, and plays an important role in the regulation of cell proliferation, apoptosis and transformation. The aim of this study was to evaluate the prognostic significance of PKR in lymph node negative rectal cancer. Forty-three patients with stage II rectal carcinoma who underwent potentially curative resection followed by post-operative adjuvant chemoradiation and 5-fluorouracil-based chemotherapy were investigated immunohistochemically using the monoclonal antibody TJ4C4. Overall scores for PKR expression were calculated based on staining intensity and immunoreactive tumor cell fraction. Clinical information, including tumor grade, carcinoembryonic antigen (CEA), disease-free survival (DFS) and overall survival (OS) was evaluated and compared with the degree of PKR expression. The median follow-up duration was 53.2 months, and median patient age was 55 years (range 33-73). No relationships were found between PKR score and age, sex, tumor grade or CEA level; however, smaller tumors (< or =5 cm) were associated with high PKR score (P = 0.025). When patients were subdivided into two groups based on the PKR score, the relapse rate was lower for those with a high PKR score (7.4 versus 43.8%, P = 0.008), and a significant difference was found between these two groups in terms of 5 year DFS (92.6 versus 55.6%, P = 0.0072) and 5 year OS (92.6 versus 57.7%, P = 0.0459). Other clinicopathologic variables were not related to clinical outcome. PKR expression levels were associated with disease recurrence, DFS and OS in lymph node negative rectal cancer patients.
    Japanese Journal of Clinical Oncology 10/2005; 35(9):545-50. · 1.90 Impact Factor
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    ABSTRACT: To determine the activity and the toxicity associated with a low dose regimen of leucovorin (LV) plus 5-fluorouracil (5-FU) combined with oxaliplatin every two weeks (modified FOLFOX 4) as a salvage therapy for advanced gastric cancer patients. Between December 2003 and December 2004, 33 patients were enrolled in this study. The patients were treated with oxaliplatin 85 mg/m(2) as a 2-hour infusion on the first day plus LV 20 mg/m(2) over 10 minutes. Subsequently, the patients were given a 5-FU bolus 400 mg/m(2) followed by a 22-hour continuous infusion of 600 mg/m(2) on days 1 approximately 2. The treatment was repeated at 2 week intervals. The median age of the patients was 50 years (range: 31 approximately 74), 82% (27/33) had the Eastern Cooperative Oncology Group performance status was 0 and 1. Of the 30 patients who could be evaluated for their tumor response, 8 achieved a partial response, with an overall response rate of 26.7% (95% confidence interval (CI): 20.5 approximately 32.7%). Fifteen patients (50%) showed stable disease and 7 patients (23.3%) progressed during the course of treatment. The median time from the start of chemotherapy to progression was 3.5 months (95% CI: 2.6 approximately 4.4 months) and the median overall survival time was 7.9 months (95% CI: 5.9 approximately 9.9 months). The major grade 3/4 hematological toxicity encountered included neutropenia (45.4%) and thrombocytopenia (3.0%). Neutropenic fever occurred during only 2 of the 178 cycles. The most common non-hematological toxicity encountered was grade 1/2 nausea/vomiting, which occurred in 18.2% of patients, diarrhea in 12.1% and neuropathy in 15.2%. There were no treatment related deaths. The modified FOLFOX 4 regimen appears to be a safe and effective salvage therapy for advanced gastric cancer patients.
    Cancer Research and Treatment 10/2005; 37(5):279-83. · 1.96 Impact Factor
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    ABSTRACT: The aim of this study was to assess the intensity of tumor budding in colon carcinoma quantitatively and to determine its correlation with malignancy potential. The intensities of tumor budding at the invasive front of surgical specimens from 174 patients with well-differentiated or moderately differentiated colon carcinoma were investigated. Differences in intensity among clinicopathologic parameters were compared, and recurrences and survivals were analyzed in accordance with degree of the intensity. Tumor budding was identified in 155 patients (89 percent) and the mean intensity (+/- standard deviation) of budding was, on the whole, 6.6 +/- 5.6. Intensity was significantly higher in tumors with lymphatic and vascular invasion than in those without (9.1 +/- 6.6 vs. 4.8 +/- 3.9 and 9.8 +/- 6.1 vs. 5.4 +/- 4.9; P < 0.0001, respectively). It became significantly higher with increasing T and N stage (P = 0.0013 and < 0.0001, respectively). Both the Cox model and the linear logistic regression indicated that higher intensity was significantly associated with higher risk of postoperative recurrence (P = 0.017 and 0.0001, respectively). When patients were stratified into four groups based on the quartiles of the distribution of intensity, the group of higher quartiles showed significantly less favorable outcome in terms of both five-year disease-free (P = 0.0039) and overall survival (P = 0.0263). The cutoff of the intensity considered to be the best indicator for separating patients with regard to survival was third quartiles (intensity, 9). Based on multivariate analysis, the intensity of budding proved to be a significant covariate associated with disease-free survival (hazard ratio, 2.061; P = 0.0066). The intensity of tumor budding at the invasive margin is suggested to be a significant pathologic index, indicating higher malignancy potential and the intensity greater than nine may be considered an adverse prognostic indicator in patients with colon carcinoma.
    Diseases of the Colon & Rectum 09/2005; 48(8):1597-602. · 3.34 Impact Factor
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    ABSTRACT: Laparoscopic splenectomy (LS) has become the treatment of choice for patients with idiopathic thrombocytopenic purpura (ITP) who do not respond to medical treatment. The aim of this study was to identify factors predictive of outcome after LS for ITP. From May 1997 to December 2002, we performed 30 LS on patients with ITP. A positive response was defined as a postoperative platelet count greater than 50,000/micro L and no requirement for maintenance therapy. Chi-square testing was performed to determine the predictive effects of the following variables: age, sex, preoperative response to steroids or immunoglobulin, duration of disease, antiplatelet antibody, platelet associated antibody, and antinuclear antibody. LS was successfully performed in all patients. For a mean follow-up interval of 24.3 months, response to LS was 73.3%. Splenectomy for steroid nonresponders resulted in an inferior complete response rate (10 of 18, 55.6%) as compared with those that experienced relapse after steroid treatment (11 of 12, 91.7%) (p=0.042). The other significant predictor of outcome by univariate analysis was the time between diagnosis and surgery (p=0.049). The other variables showed no significant correlation with successful splenectomy. We conclude that LS can be performed safely with a satisfactory remission rate in patients with ITP who do not respond to medical treatment, and that the factors most frequently associated with surgical success are a response to steroid and disease duration.
    Journal of Korean Medical Science 07/2005; 20(3):417-20. · 1.25 Impact Factor
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    ABSTRACT: The aim of this study was to quantitatively assess the intensity of tumor budding in rectal carcinoma and to determine how it correlates with the malignant potential. Intensities of the tumor budding at the invasive front of the surgical specimens from 90 patients (male, 51) with well- or moderately-differentiated rectal carcinoma were investigated. Differences in the budding intensity among pathologic variables were compared, and recurrences and survivals were analyzed in accordance with degree of the budding intensity. The patients ranged in age from 33 to 75 years (mean, 55.4) with the median follow-up being 43 months (range, 12 approximately 108). Tumor budding was identified in 89 patients (98.9%) with a mean intensity of 7.5+/-5.3. The budding intensity was significantly higher in tumors with lymphatic invasion (p=0.0081), blood vessel invasion (p<0.0001), and perineural invasion (p=0.0013) than in those tumor without these findings. It became significantly higher with the increase in nodal stage (p<0.0001). The intensity of tumor budding in patients with relapse (29 patients) was significantly higher than that in patients without relapse (6.2+/-5.0 vs. 10.2+/-4.9; p=0.0005), but this difference in the intensity was observed only for the node-positive patients (8.0+/-3.4 vs. 11.9+/-5.1; p=0.0064). When the patients were stratified into two groups on either side of the mean of the intensity, the higher intensity group showed a significantly less favorable disease-free (DFS) and overall survival (OS) (p=0.0026 and 0.0205, respectively). Based on the multivariate analysis, the nodal stage and the intensity of budding proved to be the independent variables associated with DFS (p=0.023 and 0.03, respectively). Tumor budding at the invasive margin is a reliable pathologic index that indicates a higher malignant potential and a less favorable prognosis for patients with advanced rectal carcinoma.
    Cancer Research and Treatment 06/2005; 37(3):177-82. · 1.96 Impact Factor

Publication Stats

1k Citations
233.11 Total Impact Points

Institutions

  • 2010
    • Gyeongsang National University
      • Department of Laboratory Medicine
      Chinju, South Gyeongsang, South Korea
  • 2005–2007
    • Dong-Pusan College
      Tsau-liang-hai, Busan, South Korea
  • 2003–2007
    • Dong-A University
      • College of Medicine
      Tsau-liang-hai, Busan, South Korea