[Method for determining optimal intracavitary radiotherapy conditions for carcinoma of the uterine cervix with tumor infiltration of the vaginal wall].
Stage III carcinoma of the uterine cervix is occasionally accompanied by tumor infiltration of the vaginal wall. Currently, the vaginal wall has to be irradiated in the same manner as the uterine cervix. The authors have developed a system for determining the optimal irradiation conditions for treating the two regions, uterine cervix and vaginal wall, at the same time. A comparison of two methods is shown in simulation, and then a clinical case is reported. The first method consists of two treatment plans, one for the uterine cervix without tumor infiltration of the vaginal wall, and the other for the vaginal wall without carcinoma of the uterine cervix. The second, newly developed method considers the two regions together. Irradiation times of ovoid sources obtained with the second method are 15-25% less than those of the first method. Isodose curves obtained with the two methods are very different, and thus the uterine cervix and vaginal wall must be considered together in order to determine irradiation conditions.
Tabushi
K
K
Nagoya University School of Health Sciences.
Itoh
S
S
Sakura
M
M
Kato
S
S
Kazumoto
T
T
Nakamura
Y
Y
Iinuma
T A
TA
Arai
T
T
Obata
Y
Y
D001918:Brachytherapy / Q000379:methods*; D005260:Female; D006801:Humans; D009361:Neoplasm Invasiveness; D011880:Radiotherapy Planning, Computer-Assisted; D002583:Uterine Cervical Neoplasms / Q000473:pathology* / Q000532:radiotherapy*; D014625:Vaginal Neoplasms / Q000473:pathology*