From Jan.1984 to Dec. 1986, 90 patients with lung cancer were treated at the Department of Radiation Therapy in Hanyang University Hospital. Histopathologically, 67 cases of them were the squamous cell carcinoma,7 cases were the adenocarcinoma, 4 cases were the large cell undiffe rentiated carcinoma and 12 cases were the small cell carcinoma. Among the 78 patients with non small cell carcinoma, 50 patients had received radiation dosage above 4000 cGy.40 patient had follow up from 17 months to 53 months. The complete response rate was $7.3\%$ and partial response rate was $68.3\%$. Overall survival at 1, 2 and 3 years were $47.5\%,\;23.5\%\;and\;6.3\%$ respectively. None was survived longer than 38 months. Median survival was 12.2 month for 40 patient and 9 month for stage III, M1 group and 9.5 month for stage III, MO group. In M1 patient no survival was seen after 2 years while in M0 patient $23.3\%$ survival was seen.
Objective : This retrospective study was designed to evaluate the anti-tumor efficacy and toxicities of the radiation therapy(RT) combined with cisplatin-based chemotherapy in locally advanced nasopharyngeal cancer(NPC). Materials and Methods : Fifty three patients with locally advanced NPCs(AJCC stage II, III, IV) received curative RT and cisplatin-based chemotherapy. Duration of follow-up ranged from 5.5 to 201 months(median 50.8 months). Nineteen patients(35.8%) were treated with induction chemotherapy including cisplatin $100mg/m^2$ for 1 day and 5-fluorouracil $1g/m^2$ for 5 days followed by RT(Induction CTx-RT). Another 34 patients (64.2%) were treated with concurrent chemoradiation(CCRT) using cisplatin $100mg/m^2$(D1, 22, 43). Results : Thirty-six(67.9%) and 11(20.8%) patients achieved clinical complete response and partial response, respectively. The pattern of failure was as follows:14 locoregional recurrence(26.4%) and 7 distant metastasis(13.2%). Among them, two patients(3.8%) had both locoregional and distant failure. Median overall survival(OS) and progression-free survival(PFS) were 85.5 months and 87.5 months, respectively. Five-year OS rate was 57.1%. The stage(AJCC), tumor response to chemoradiation and T stage were significant prognostic factors for OS(p=0.0113, p=0.0362 and p=0.0469). The stage(AJCC), tumor response to chemoradiation were also significant prognostic factors for PFS(p=0.0329, p=0.0424). Compared to each treatment group(Induction CTx-RT vs. CCRT), there were no significant differences in OS and PFS(p=0.7000, p=0.8261). Grade 3-4 mucositis, nausea/vomiting and hematological toxicities were noticed in 35.8%, 11.3% and 13.2%, respectively. Delayed RT over 2 weeks was inevitable in 26.5%. Seventeen patients(50%) successfully completed planned 3 courses of cisplatin in CCRT group. Conclusions : RT combined with cisplatin-based chemotherapy in locally advanced NPC showed high response rate, good locoregional control, and survival rate. As expected, frequency of acute toxicities increased, and the patient's compliance to treatment was need to be improved. Although our data could not show additional survival benefit of CCRT compare to that of induction chemotherapy followed by RT, patients' accrual and further follow-up are required due to limitation of retrospective study.
Kim, Jeong -Hee;Lee, Kyung -Jong;Cho, Chul -Koo;Yoo, Seong -Yul;Kim, Tae -Hwan;Ji, Young -Hoon;Kim, Sung -Ho
Archives of Pharmacal Research
/
v.18
no.6
/
pp.410-414
/
1995
Adaptive response induced by low dese .gamma.-ray irradiation in human cervical carcinoma cells was examined. Cells were exposured to low dose of .gamma.-ray irradiation in human cervical carcinoma cells was examined. Cells were exposured to low dose of .gamma.-ray (1-cGy) followed by high doses of r-ray irradiation (0,1,2,3,5,7 and 9Gy for chlnogenic assay or 1.5Gy for micronucleus assay) with various time intervals. Survival fractions of cells in both low dose-irradiated and unirrated groups were analyzed by clonogenic assay. Surviva fractions of low dose-irradiated in cell survival was maximum when low and high dose irradiation time interval was 4 hr. Frequencies of micronuclei which is an indicative of chromosome aberration were also enutained from survival fractions analyzed by clonogenic assay, maximum when low and high dose irradiation time interval was 4hr. Frequencies of micronuclei which is an indicative of chromosome aberration were also enumerated in both low dose-irradiated and unirradiated groups. In consiststent with the result obtained from survival fractions analyzed by clonogenic assay, maximum reduction in frquencies of micronuclei was observed when low dose radiation was given 4 hr prior to high response to subsequent high dose .gamma.-ray irradiation in human cervical carcinomal cells. Our data suggest that one of the possible mechanisms of adaptive response induced by low dose rediation is the increase in repair of DNA double strand breaks in low dose radiation-adapted cells.
Seol, Seung Won;Yu, Jeong Il;Park, Hee Chul;Lim, Do Hoon;Oh, Dongryul;Noh, Jae Myoung;Cho, Won Kyung;Paik, Seung Woon
Radiation Oncology Journal
/
v.33
no.4
/
pp.276-283
/
2015
Purpose: We evaluated the efficacy and toxicity of repeated high dose 3-dimensional conformal radiation therapy (3D-CRT) for patients with unresectable hepatocellular carcinoma. Materials and Methods: Between 1998 and 2011, 45 patients received hepatic re-irradiation with high dose 3D-CRT in Samsung Medical Center. After excluding two ineligible patients, 43 patients were retrospectively reviewed. RT was delivered with palliative or salvage intent, and equivalent dose of 2 Gy fractions for ${\alpha}/{\beta}=10Gy$ ranged from $31.25Gy_{10}$ to $93.75Gy_{10}$ (median, $44Gy_{10}$). Tumor response and toxicity were evaluated based on the modified Response Evaluation Criteria in Solid Tumors criteria and the Common Terminology Criteria for Adverse Events (CTCAE) ver. 4.0. Results: The median follow-up duration was 11.2 months (range, 4.1 to 58.3 months). An objective tumor response rate was 62.8%. The tumor response rates were 81.0% and 45.5% in patients receiving ${\geq}45Gy_{10}$ and $<45Gy_{10}$, respectively (p = 0.016). The median overall survival (OS) of all patients was 11.2 months. The OS was significantly affected by the Child-Pugh class as 14.2 months vs. 6.1 months (Child-Pugh A vs. B, p < 0.001), and modified Union for International Cancer Control (UICC) T stage as 15.6 months vs. 8.3 months (T1-3 vs. T4, p = 0.004), respectively. Grade III toxicities were developed in two patients, both of whom received ${\geq}50Gy_{10}$. Conclusion: Hepatic re-irradiation may be an effective and tolerable treatment for patients who are not eligible for further local treatment modalities, especially in patients with Child-Pugh A and T1-3.
Cho Moon-June;Jang Ji-Young;Kim Jun-Sang;Kim Byung-Kook;Song Chang-Joon;Kim Jae-Sung
Radiation Oncology Journal
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v.19
no.1
/
pp.10-15
/
2001
Purpose : This is a retrospective study to evaluate the results of radiation therapy in nasopharyngeal carcinoma. Materials and Methods : From September 1989 to October 1996, 19 patients with nasopharyngeal carcinoma completed planned radiation therapy course. Stages were 1 in 2 patients, II in 6, III in 2 IV in 9 patients, respectively. Pathology was squamous cell carcinoma in 5 patients, undifferentiated cell carcinoma in 14 patients. Fourteen patients were treated with radiation therapy only. Five patients received chemotherapy. The follow-up period ranged from 5 months to 115 months with a median of 33 months. Follow-up was possible in all patients. Results : Responses to radiation therapy were complete response in 15 patients, partial response in 2, and no response in 2, respectively. Patterns of failure were as follows : locoregional recurrence in 6 patients and distant metastasis in 4 patients. The sites of distant metastasis were bone, liver and lung. Five year survival rate was $47.8\%$ and five year disease free survival rate was $48.1\%$. Stage, T-stage, N-stage, central nervous system involvement, pathology type, performance status, response, radiation dose, chemotherapy were not significant prognostic factors. Conclusion : 5-year survival rate was $47.8\%$ and 5-year disease free survival rate was $48.1\%$. The advances in radiation therapy techniques and chemotherapy are needed.
Lee, Tae Hoon;Lee, Joo Ho;Chang, Ji Hyun;Ye, Sung-Joon;Kim, Tae Min;Park, Chul-Kee;Kim, Il Han;Kim, Byoung Hyuck;Wee, Chan Woo
Radiation Oncology Journal
/
v.38
no.1
/
pp.35-43
/
2020
Purpose: This retrospective study compares higher-dose whole-brain radiotherapy (hdWBRT) with reduced-dose WBRT (rdWBRT) in terms of clinical efficacy and toxicity profile in patients treated for primary central nervous system lymphoma (PCNSL). Materials and Methods: Radiotherapy followed by high-dose methotrexate (HD-MTX)-based chemotherapy was administered to immunocompetent patients with histologically confirmed PCNSL between 2000 and 2016. Response to chemotherapy was taken into account when prescribing the radiation dose to the whole brain and primary tumor bed. The whole brain dose was ≤23.4 Gy for rdWBRT (n = 20) and >23.4 Gy for hdWBRT (n = 68). Patients manifesting cognitive disturbance, memory impairment and dysarthria were considered to have neurotoxicity. A median follow-up was 3.62 years. Results: The 3-year overall survival (OS) and progression-free survival (PFS) were 70.0% and 48.9% with rdWBRT, and 63.2% and 43.2% with hdWBRT. The 3-year OS and PFS among patients with partial response (n = 45) after chemotherapy were 77.8% and 53.3% with rdWBRT, and 58.3% and 45.8% with hdWBRT (p > 0.05). Among patients with complete response achieved during follow-up, the 3-year freedom from neurotoxicity (FFNT) rate was 94.1% with rdWBRT and 62.4% with hdWBRT. Among patients aged ≥60 years, the 3-year FFNT rate was 87.5% with rdWBRT and 39.1% with hdWBRT (p = 0.49). Neurotoxicity was not observed after rdWBRT in patients aged below 60 years. Conclusion: rdWBRT with tumor bed boost combined with upfront HD-MTX is less neurotoxic and results in effective survival as higher-dose radiotherapy even in partial response after chemotherapy.
Purpose: To evaluate the efficacy of positron emission tomography with 2-[F-18] fluoro-2-deoxy-D-glucose in discrimination of response in the nasopharyngeal carcinoma patients who treated with radiotherapy. Methods and Materials: Twenty-four patients who underwent FDG-PET scan before and after radiotherapy for no disseminated head and neck carcinoma at the Asan Medical Center between August 2001 and September 2002 were evaluate by prospective analysis. First FDG-PET scan performed before radiotherapy within 1 month, and second FDG-PET scan performed 1 month after radiotherapy. FDG-PET images were analyzed by standard uptake value (SUV). Follow-up period was more than 6 months. Results: The pretreatment SUV was 3.4-14.0 (median: 6.0) and posttreatment SUV was ground level-7.7 (median: 2.0). The overall sensitivity and specicity of FDG-PET to evaluate residual tumors in the nasopharyngeal carcinoma patients were 94% and 94%. Conclusion: FDG-PET is effective in evaluation of radiation response in the nasopharyngeal carcinoma. We think that the timing of one month after finished radiotherapy FDG-PET scan was not too fast to evaluation of radiation response.
Gui, Chengcheng;Morris, Carol D.;Meyer, Christian F.;Levin, Adam S.;Frassica, Deborah A.;Deville, Curtiland;Terezakis, Stephanie A.
Radiation Oncology Journal
/
v.37
no.2
/
pp.117-126
/
2019
Purpose: The purpose of this study was to characterize and evaluate the clinical significance of volume changes of soft tissue sarcomas during radiation therapy (RT), prior to definitive surgical resection. Materials and Methods: Patients with extremity or pelvis soft tissue sarcomas treated at our institution from 2013 to 2016 with RT prior to resection were identified retrospectively. Tumor volumes were measured using cone-beam computed tomography obtained daily during RT. Linear regression evaluated the linearity of volume changes. Kruskal-Wallis tests, Mann-Whitney U tests, and linear regression evaluated predictors of volume change. Logistic and Cox regression evaluated volume change as a predictor of resection margin status, histologic treatment response, and tumor recurrence. Results: Thirty-three patients were evaluated. Twenty-nine tumors were high grade. Prior to RT, median tumor volume was 189 mL (range, 7.2 to 4,885 mL). Sixteen tumors demonstrated significant linear volume changes during RT. Of these, 5 tumors increased and 11 decreased in volume. Myxoid liposarcoma (n = 5, 15%) predicted decreasing tumor volume (p = 0.0002). Sequential chemoradiation (n = 4, 12%) predicted increasing tumor volume (p = 0.008) and corresponded to longer times from diagnosis to RT (p = 0.01). Resection margins were positive in three cases. Five patients experienced local recurrence, and 7 experienced distant recurrence, at median 8.9 and 6.9 months post-resection, respectively. Volume changes did not predict resection margin status, local recurrence, or distant recurrence. Conclusion: Volume changes of pelvis and extremity soft tissue sarcomas followed linear trends during RT. Volume changes reflected histologic subtype and treatment characteristics but did not predict margin status or recurrence after resection.
Purpose: To evaluate the extent of pain response and objective response to palliative radiotherapy (RT) for bone metastases from hepatocellular carcinoma according to RT dose. Materials and Methods: From January 2007 to June 2010, palliative RT was conducted for 103 patients (223 sites) with bone metastases from hepatocellular carcinoma. Treatment sites were divided into the high RT dose and low RT dose groups by biologically effective dose (BED) of 39 $Gy_{10}$. Pain responses were evaluated using the numeric rating scale. Pain scores before and after RT were compared and categorized into 'Decreased', 'No change' and 'Increased'. Radiological objective responses were categorized into complete response, partial response, stable disease and progression using modified RECIST (Response Evaluation Criteria In Solid Tumors) criteria; the factors predicting patients' survival were analyzed. Results: The median follow-up period was 6 months (range, 0 to 46 months), and the radiologic responses existed in 67 RT sites (66.3%) and 44 sites (89.8%) in the high and low RT dose group, respectively. A dose-response relationship was found in relation to RT dose (p=0.02). Pain responses were 75% and 65% in the high and low RT dose groups, respectively. However, no statistical difference in pain response was found between the two groups (p=0.24). There were no differences in the toxicity profiles between the high and low RT dose groups. Median survival from the time of bone metastases diagnosis was 11 months (range, 0 to 46 months). The Child-Pugh classification at the time of palliative RT was the only significant predictive factor for patient survival after RT. Median survival time was 14 months under Child-Pugh A and 2 months under Child-Pugh B and C. Conclusion: The rate of radiologic objective response was higher in the high RT dose group. Palliative AT with a high dose would provide an improvement in patient quality of life through enhanced tumor response, especially in patients with proper liver function.
Schmitz-Feuerhake, Inge;Busby, Christopher;Pflugbeil, Sebastian
Environmental Analysis Health and Toxicology
/
v.31
/
pp.1.1-1.13
/
2016
Objectives To investigate the accuracy and scientific validity of the current very low risk factor for hereditary diseases in humans following exposures to ionizing radiation adopted by the United Nations Scientific Committee on the Effects of Atomic Radiation and the International Commission on Radiological Protection. The value is based on experiments on mice due to reportedly absent effects in the Japanese atomic bomb (A-bomb) survivors. Methods To review the published evidence for heritable effects after ionising radiation exposures particularly, but not restricted to, populations exposed to contamination from the Chernobyl accident and from atmospheric nuclear test fallout. To make a compilation of findings about early deaths, congenital malformations, Down's syndrome, cancer and other genetic effects observed in humans after the exposure of the parents. To also examine more closely the evidence from the Japanese A-bomb epidemiology and discuss its scientific validity. Results Nearly all types of hereditary defects were found at doses as low as one to 10 mSv. We discuss the clash between the current risk model and these observations on the basis of biological mechanism and assumptions about linear relationships between dose and effect in neonatal and foetal epidemiology. The evidence supports a dose response relationship which is non-linear and is either biphasic or supralinear (hogs-back) and largely either saturates or falls above 10 mSv. Conclusions We conclude that the current risk model for heritable effects of radiation is unsafe. The dose response relationship is non-linear with the greatest effects at the lowest doses. Using Chernobyl data we derive an excess relative risk for all malformations of 1.0 per 10 mSv cumulative dose. The safety of the Japanese A-bomb epidemiology is argued to be both scientifically and philosophically questionable owing to errors in the choice of control groups, omission of internal exposure effects and assumptions about linear dose response.
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