CARCINOMA OF THE UTERINE CERVIX .1. IMPACT OF PROLONGATION OF OVERALL TREATMENT TIME AND TIMING OF BRACHYTHERAPY ON OUTCOME OF RADIATION-THERAPY

被引:315
作者
PEREZ, CA
GRIGSBY, PW
CASTROVITA, H
LOCKETT, MA
机构
[1] Radiation Oncology Center, Mallinckrodt Institute of Radiology, Washington University School of Medicine, St. Louis, MO
来源
INTERNATIONAL JOURNAL OF RADIATION ONCOLOGY BIOLOGY PHYSICS | 1995年 / 32卷 / 05期
关键词
CARCINOMA OF UTERINE CERVIX; RADIATION THERAPY; TUMOR CONTROL; SURVIVAL; OUTCOME;
D O I
10.1016/0360-3016(95)00220-S
中图分类号
R73 [肿瘤学];
学科分类号
100214 ;
摘要
Purpose: Some studies have described decreased pelvic tumor control and survival rates in invasive carcinoma of uterine cervix when the overall time in a course of definitive irradiation is prolonged. We attempt to confirm or deny these observations and evaluate the impact of timing of brachytherapy on outcome. We also explore the hypothesis that more extensive tumors technically require prolongation of the course of irradiation; thus, decreased tumor control and survival in these patients may not necessarily be the result of time/dose factor. Methods and Materials: Records of 1224 patients (Stage IB to III) treated with definitive irradiation (combination of external beam and two intracavitary insertions to deliver doses of 70 to 90 Gy to point A) were reviewed. Follow-up was obtained in 97% of the patients (median, 12 years; minimum, 3 years; maximum, 28 years). The relationship between outcome and overall treatment time and time of intracavitary insertions was analyzed in each stage and according to tumor size/extent. Results: There was strong correlation between overall treatment time (OTT) and tumor stage (less than or equal to 7 weeks: 81% for Stage IB; 74% for Stage IIA; 52% for Stage IIB; and 47% for Stage III). Interruptions of therapy accounting for prolongation of treatment time occurred in 25-30% of patients, most frequently because of holidays and weekends and side effects of therapy. Overall treatment time had a major impact on pelvic tumor control in Stages IB, IIA, and IIB; in Stage IB 10-year actuarial pelvic failure rates were 7% with OTT less than or equal to 7 weeks, 22% with 7.1 to 9 weeks, and 36% with >9 weeks (p less than or equal to 0.01). For Stage IIA the corresponding values were 14%, 27%, and 36% (p=0.08), and in Stage IIB pelvic failure rates were 20%, 28%, and 34%, respectively (p=0.09). In Stage III, pelvic failure was 30%, 40%, and 50%, respectively (p = 0.08). There was also a strong correlation between OTT and 10-year cause-specific survival (CSS); in Stage IB rates were 86% with OTT of less than or equal to 7 weeks, 78% for 7.1 to 9 weeks, and 55% for greater than or equal to 9 weeks (p<0.01). The corresponding rates in Stage IIA were 73%, 41%, and 48% (p less than or equal to 0.01). For patients with Stage IIB, CSS rates were 72% for OTT less than or equal to 7 weeks, 60% for 7.1 to 9 weeks, and 70% for >9 weeks (p=0.01). Patients with Stage III disease had 45% 10-year CSS when treatment was delivered in 9 weeks or less and 36% for longer overall times (p = 0.16). In multivariate analysis of patients with Stage IB and IIA, OTT and clinical stage were the most important prognostic factors for pelvic tumor control, disease-free survival, and CSS. Tumor size was a prognostic factor for CSS. In Stages IIB and III, OTT, clinical stage, unilateral or bilateral parametrial invasion, and dose to point A were significant prognostic factors for pelvic tumor control, disease-free survival, and CSS. Prolongation of time had a significant impact on pelvic tumor control and CSS regardless of tumor size, except in Stage IB tumors less than or equal to 3 cm. Regression analysis confirms previous reports that prolongation of OTT results in decreased pelvic tumor control rate of 0.85% per day for all patients, 0.37% per day in Stages IB and IIA, 0.68% per day in Stage IIB, and 0.54% for Stage III patients treated with greater than or equal to 85 Gy to point A. Performance of all intracavitary insertions within 4.5 weeks from initiation of irradiation yielded decreased pelvic failure rates in some groups of patients (8.8 vs. 18% in Stage IB and IIA tumors less than or equal to 4 cm and 12.3 vs. 35% in Stage IIB) (p less than or equal to 0.01). Conclusions: Prolongation of treatment time in patients with Stage IB, IIA, IIB, and III carcinoma of the uterine cervix has a significant impact on pelvic tumor control and CSS. The effect of OTT was present regardless of tumor size except in Stage IB tumors less than or equal to 3 cm. This may be related to biologic factors such as cell repopulation and increased proliferation resulting from treatment interruptions, in addition to initial clonogenic cell burden. Irradiation for patients with invasive carcinoma of the cervix should be delivered in the shortest possible overall time.
引用
收藏
页码:1275 / 1288
页数:14
相关论文
共 42 条
[1]   THE EFFECT OF TREATMENT TIME AND TREATMENT INTERRUPTION ON TUMOR-CONTROL FOLLOWING RADICAL RADIOTHERAPY OF LARYNGEAL-CANCER [J].
BARTON, MB ;
KEANE, TJ ;
GADALLA, T ;
MAKI, E .
RADIOTHERAPY AND ONCOLOGY, 1992, 23 (03) :137-143
[2]   IMPACT OF OVERALL TREATMENT TIME OF FRACTIONATED-IRRADIATION ON LOCAL-CONTROL OF HUMAN FADU SQUAMOUS-CELL CARCINOMA IN NUDE-MICE [J].
BAUMANN, M ;
LIERTZ, C ;
BAISCH, H ;
WIEGEL, T ;
LORENZEN, J ;
ARPS, H .
RADIOTHERAPY AND ONCOLOGY, 1994, 32 (02) :137-143
[3]  
BEAHRS OH, 1992, MANUAL STAGING CANCE
[4]   THE PREDICTIVE VALUE OF CELL KINETIC MEASUREMENTS IN A EUROPEAN TRIAL OF ACCELERATED FRACTIONATION IN ADVANCED HEAD AND NECK TUMORS - AN INTERIM-REPORT [J].
BEGG, AC ;
HOFLAND, I ;
MOONEN, L ;
BARTELINK, H ;
SCHRAUB, S ;
BONTEMPS, P ;
LEFUR, R ;
VANDENBOGAERT, W ;
CASPERS, R ;
VANGLABBEKE, M ;
HORIOT, JC .
INTERNATIONAL JOURNAL OF RADIATION ONCOLOGY BIOLOGY PHYSICS, 1990, 19 (06) :1449-1453
[5]   EVALUATION OF TIME INTERVAL BETWEEN EXTERNAL IRRADIATION AND INTRACAVITARY CURIETHERAPY IN CARCINOMA OF UTERINE CERVIX - INFLUENCE ON CURABILITY [J].
BOSCH, A ;
MARCIAL, VA .
RADIOLOGY, 1967, 88 (03) :563-&
[6]  
COX DR, 1972, J R STAT SOC B, V34, P187
[7]   INTERRUPTIONS OF HIGH-DOSE RADIATION-THERAPY DECREASE LONG-TERM SURVIVAL OF FAVORABLE PATIENTS WITH UNRESECTABLE NONSMALL CELL-CARCINOMA OF THE LUNG - ANALYSIS OF 1244 CASES FROM 3 RADIATION-THERAPY ONCOLOGY GROUP (RTOG) TRIALS [J].
COX, JD ;
PAJAK, TF ;
ASBELL, S ;
RUSSELL, AH ;
PEDERSON, J ;
BYHARDT, RW ;
EMAMI, B ;
ROACH, M .
INTERNATIONAL JOURNAL OF RADIATION ONCOLOGY BIOLOGY PHYSICS, 1993, 27 (03) :493-498
[8]  
CUTLER S J, 1958, J Chronic Dis, V8, P699, DOI 10.1016/0021-9681(58)90126-7
[9]   CHANGES IN RATE OF REPOPULATION DURING MULTIFRACTION IRRADIATION OF MOUSE SKIN [J].
DENEKAMP, J .
BRITISH JOURNAL OF RADIOLOGY, 1973, 46 (545) :381-387
[10]  
Fletcher G, 1980, TXB RADIOTHERAPY