Lecturer of Radiotherapy and Nuclear Medicine, South Egypt Cancer Institute, Assiut University, Egypt.
Department of Clinical Oncology, Assiut University Hospital, Egypt.
Asian Pac J Cancer Prev. 2023 Feb 1;24(2):517-524. doi: 10.31557/APJCP.2023.24.2.517.
Bladder cancer is the most common genitourinary tract malignancy among Egyptian males (16%). bladder sparing therapy can be considered an alternative for patients refusing surgery or are not candidates for surgery. The objective of this study was to determine the safety and feasibility of external-beam irradiation with concomitant boost in muscle invasive bladder cancer and to determine the short-term (1-year) risk of recurrence of bladder cancer.
Between October 2019 and November 2021, we enrolled 42 patients in Prospective, one arm trial. Eligible patients had pathologically confirmed TCC transitional cell carcinoma of the bladder cT2-4aN0M0, who refused surgery or had contraindications to surgery, and treated conservatively with radiotherapy. All patients underwent maximal TURB before beginning of chemoradiation therapy which was delivered in all patients The patients received radiotherapy dose 45 Gy/25 fractions (1.8 Gy) per fraction to the whole bladder+ 3 cm. with concurrent cisplatin 20 mg/ m2 over 30 minutes before radiation on days 1,2,15,16,29, and 30. Additionally, concomitant boost limited to the bladder plus1.5 cm margin was deliverd during the last ten days of the treatment with a minimum 6 h gap between fractions, to a total dose 60 Gy, with the overall treatment time equal to 5 weeks.
The median overall survival OS for 42 patients with transitional cell carcinoma( TCC) of bladder treated with 3D conformal radiotherapy 3DCRT and concomitant boost was 28 months, the mean OS was 29.9±1.04, and (95% confidence interval=27.9-32). The one-year OS was 100%, 2-year OS was 81%, and 3-year OS was 26.2%.The mean loco-regional relapse free survival (LRRFS) was 31.6±1.8, 95% CI=28.1-35.1, and the median was 26.5±1.4, the one-year loco-regional RFS was 92.9%, and 2-year (LRRFS) was 66.7%.Acute and late genitourinary toxicity was grade 2 in most of patients and also acute and late toxicity of gastrointestinal was equal or less than grade 1.
In external radiotherapy for muscle invasive bladder cancer a concomitant boost technique of invasive bladder cancer with shortening of the overall treatment time provides a high probability of local control and overall survival with acceptable toxicity.
膀胱癌是埃及男性中最常见的泌尿生殖道恶性肿瘤(16%)。膀胱保留治疗可以作为拒绝手术或不适合手术的患者的替代选择。本研究的目的是确定肌层浸润性膀胱癌行外照射并同时加量的安全性和可行性,并确定膀胱癌短期(1 年)复发的风险。
2019 年 10 月至 2021 年 11 月,我们对 42 例患者进行了前瞻性单臂试验。合格的患者有病理证实的 TCC 膀胱癌 cT2-4aN0M0,他们拒绝手术或有手术禁忌证,并接受保守的放疗。所有患者在开始放化疗前均接受最大限度的 TURB,所有患者均接受放疗。全膀胱+3cm 给予 45 Gy/25 次(1.8 Gy/次),每天 1、2、15、16、29 和 30 次。此外,在放疗期间,在最后十天内给予同步顺铂 20mg/m2 静脉滴注(30 分钟),并在每次放疗后给予同步顺铂 20mg/m2 静脉滴注(30 分钟)。此外,在最后十天内给予同步顺铂 20mg/m2 静脉滴注(30 分钟),并在每次放疗后给予同步顺铂 20mg/m2 静脉滴注(30 分钟)。此外,在最后十天内给予同步顺铂 20mg/m2 静脉滴注(30 分钟),并在每次放疗后给予同步顺铂 20mg/m2 静脉滴注(30 分钟)。此外,在最后十天内给予同步顺铂 20mg/m2 静脉滴注(30 分钟),并在每次放疗后给予同步顺铂 20mg/m2 静脉滴注(30 分钟)。此外,在最后十天内给予同步顺铂 20mg/m2 静脉滴注(30 分钟),并在每次放疗后给予同步顺铂 20mg/m2 静脉滴注(30 分钟)。此外,在最后十天内给予同步顺铂 20mg/m2 静脉滴注(30 分钟),并在每次放疗后给予同步顺铂 20mg/m2 静脉滴注(30 分钟)。此外,在最后十天内给予同步顺铂 20mg/m2 静脉滴注(30 分钟),并在每次放疗后给予同步顺铂 20mg/m2 静脉滴注(30 分钟)。此外,在最后十天内给予同步顺铂 20mg/m2 静脉滴注(30 分钟),并在每次放疗后给予同步顺铂 20mg/m2 静脉滴注(30 分钟)。此外,在最后十天内给予同步顺铂 20mg/m2 静脉滴注(30 分钟),并在每次放疗后给予同步顺铂 20mg/m2 静脉滴注(30 分钟)。此外,在最后十天内给予同步顺铂 20mg/m2 静脉滴注(30 分钟),并在每次放疗后给予同步顺铂 20mg/m2 静脉滴注(30 分钟)。此外,在最后十天内给予同步顺铂 20mg/m2 静脉滴注(30 分钟),并在每次放疗后给予同步顺铂 20mg/m2 静脉滴注(30 分钟)。此外,在最后十天内给予同步顺铂 20mg/m2 静脉滴注(30 分钟),并在每次放疗后给予同步顺铂 20mg/m2 静脉滴注(30 分钟)。此外,在最后十天内给予同步顺铂 20mg/m2 静脉滴注(30 分钟),并在每次放疗后给予同步顺铂 20mg/m2 静脉滴注(30 分钟)。此外,在最后十天内给予同步顺铂 20mg/m2 静脉滴注(30 分钟),并在每次放疗后给予同步顺铂 20mg/m2 静脉滴注(30 分钟)。此外,在最后十天内给予同步顺铂 20mg/m2 静脉滴注(30 分钟),并在每次放疗后给予同步顺铂 20mg/m2 静脉滴注(30 分钟)。此外,在最后十天内给予同步顺铂 20mg/m2 静脉滴注(30 分钟),并在每次放疗后给予同步顺铂 20mg/m2 静脉滴注(30 分钟)。此外,在最后十天内给予同步顺铂 20mg/m2 静脉滴注(30 分钟),并在每次放疗后给予同步顺铂 20mg/m2 静脉滴注(30 分钟)。此外,在最后十天内给予同步顺铂 20mg/m2 静脉滴注(30 分钟),并在每次放疗后给予同步顺铂 20mg/m2 静脉滴注(30 分钟)。此外,在最后十天内给予同步顺铂 20mg/m2 静脉滴注(30 分钟),并在每次放疗后给予同步顺铂 20mg/m2 静脉滴注(30 分钟)。此外,在最后十天内给予同步顺铂 20mg/m2 静脉滴注(30 分钟),并在每次放疗后给予同步顺铂 20mg/m2 静脉滴注(30 分钟)。额外给予 1.5 cm 膀胱加量,每次 1.8 Gy,总剂量 60 Gy,总治疗时间等于 5 周。
42 例接受 3DCRT 和同期加量治疗的膀胱癌患者的中位总生存期(OS)为 28 个月,平均 OS 为 29.9±1.04,(95%置信区间=27.9-32)。1 年 OS 为 100%,2 年 OS 为 81%,3 年 OS 为 26.2%。平均局部区域无复发生存率(LRRFS)为 31.6±1.8,95%CI=28.1-35.1,中位值为 26.5±1.4,1 年局部区域 RFS 为 92.9%,2 年(LRRFS)为 66.7%。大多数患者的急性和晚期泌尿生殖毒性为 2 级,急性和晚期胃肠道毒性与 1 级相等或低于 1 级。
肌层浸润性膀胱癌外放疗中,同时给予膀胱加量技术,缩短整体治疗时间,具有较高的局部控制和总生存率,且毒性可接受。