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Titolo:
THE IMPACT OF OVERALL TREATMENT TIME ON THE RESULTS OF RADIOTHERAPY FOR NONSMALL CELL LUNG-CARCINOMA
Autore:
KOUKOURAKIS M; HLOUVERAKIS G; KOSMA L; SKARLATOS J; DAMILAKIS J; GIATROMANOLAKI A; YANNAKAKIS D;
Indirizzi:
UNIV HOSP IRAKLION,DEPT RADIOTHERAPY ONCOL GR-71110 IRAKLION GREECE UNIV HOSP IRAKLION,DEPT BIOSTAT GR-71110 IRAKLION GREECE ST SAVAS HOSP,HELLENIC CANC INST,DEPT RADIOTHERAPY ONCOL ATHENS GREECE
Titolo Testata:
International journal of radiation oncology, biology, physics
fascicolo: 2, volume: 34, anno: 1996,
pagine: 315 - 322
SICI:
0360-3016(1996)34:2<315:TIOOTT>2.0.ZU;2-Q
Fonte:
ISI
Lingua:
ENG
Soggetto:
THERAPY-ONCOLOGY-GROUP; RADIATION-THERAPY; CANCER; REPOPULATION; FRACTIONATION; SURVIVAL; TUMORS; LARYNX;
Keywords:
NONSMALL CELL LUNG CANCER; RADIOTHERAPY; OVERALL TREATMENT TIME; NORMALIZED TOTAL DOSE;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Science Citation Index Expanded
Citazioni:
25
Recensione:
Indirizzi per estratti:
Citazione:
M. Koukourakis et al., "THE IMPACT OF OVERALL TREATMENT TIME ON THE RESULTS OF RADIOTHERAPY FOR NONSMALL CELL LUNG-CARCINOMA", International journal of radiation oncology, biology, physics, 34(2), 1996, pp. 315-322

Abstract

Purpose: We evaluated the impact of overall treatment time on the disease-free survival (DFS)and local control after radiotherapy for nonsmall cell Lung carcinoma. Methods and Materials: One hundred fifty-three cases considered as responders to radiotherapy were retrospectively analyzed, Patients with Karnofsky status < 70, pretreated with chemotherapy and with pleural or pericardial effusion, were excluded from theanalysis, Radiation dose homogenization was done with calculation of the normalized total dose without (NTD) and with time correction (NTD-T) for alpha/beta = 10 Gy. Results: Kaplan-Meier curves for 2-year DFSshowed that any analysis based on radiation dose can prove to be erroneous when the time factor is neglected, Although there was no difference between the 47-55 Gy and 56-64 Gy NTD groups, a log rank test revealed a strong difference (p < 0.0002) between NTD-T groups, No difference was observed for patients with mediastinal involvement, Logistic regression analysis showed a statistical association of dose on 2-year local progression-free probability for different time compartments, For those cases without mediastinal involvement, the daily dose lost because of treatment protraction beyond 20 days after the beginning of radiotherapy was estimated to 0.2 Gy/day, When all cases were consideredtogether this was calculated to 0.45 Gy/day. Conclusion: Time factor shoud not be underestimated when evaluating the results of radiotherapy for nonsmall cell lung cancer, There is strong evidence that prolonged overall treatment time could be a major cause of the failure of radiotherapy to control the local disease.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 27/09/20 alle ore 19:31:23