A Phase II Trial Evaluating an Organ-conserving Strategy by Radiochemotherapy for Muscle-infiltrative Bladder Cancer

If radical cystectomy remains the standard of care for muscle invasive bladder cancer, consequences of this surgical procedure are often harsh. Over the past years, concurrent chemo-radiotherapy has imposed itself as an alternative treatment. Published data on concomitant radiochemotherapy (radiotherapy/cisplatin or radiotherapy/cisplatin/5-fluorouracil combinations) showed local control rates with bladder preservation at 5 years ranging from 40% to 65% according to the disease stage, and overall survival probabilities ranging from 40% to 50% at 5 years. In order to improve local and systemic prognosis, evaluation of other chemotherapy agents with higher radiosensitizing effect, such as gemcitabine, is justified. Gemcitabine possesses its own anti-cancer activities on urothelial diseases and has a synergetic activity with cisplatin. The investigators completed a monocenter phase I study combining radiotherapy, cisplatin, and twice-weekly gemcitabine, and determined a recommended dose of gemcitabine 25 mg/m². The objective of the present study is to evaluate the combination of radiotherapy + cisplatin + gemcitabine in terms of disease-free survival in non metastatic muscle invasive urothelial cancer patients.

Sex

All

Minimum age

18 Years

Inclusion Criteria:

* Muscle invasive urothelial cancer (front line or following the progression of a superficial tumor), pT2-pT3 stage without lymphatic impairment (N0) and without detectable metastases (M0). An optimal macroscopic resection (TURB) have to be performed
* The proof of invasive tumor to the muscle should be brought by a transurethral resection under anaesthesia less than 8 weeks before or, in the absence, by superficial biopsies and formal imaging. Multiples biopsies in the bladder must also be performed.
* Age ≥ 18 years
* Life expectancy ≥ 6 months
* Kanorfsky index ≥ 70 % (WHO 0, 1, 2)
* Biological criteria: neutrophils ≥ 1500/mm3, Platelets ≥ 100 000/mm3, haemoglobin ≥ 10 g/dl, creatinine clearance \> 60 ml/mn
* No distant metastases (Thorax, abdomen, and pelvic CT-scan, bone scan)
* Efficient contraception for premenopausal women, maintained during the whole treatment and up to two months after the completion of radiotherapy.
* No radiotherapy or chemotherapy history except for in situ bladder lesions.
* No carcinological history except for non melanoma skin tumours, in situ uterine cervix cancer
* No contraindication to gemcitabine or cisplatin.
* No contraindication to radiotherapy
* Information letter and informed consent signed
* Patient covered by social security

Exclusion Criteria:

* Bladder tumors without any muscle infiltration
* Epidermoid carcinoma or adenocarcinoma
* Distance metastases or extrapelvic node positivity
* Severe digestive history (ulcerative colitis, complicated diverticulitis)
* Pregnancy and breast feeding

• BACKGROUNDAzria D, Jacot W, Prost P, Culine S, Ychou M, Lemanski C, Dubois JB. [Gemcitabine and ionizing radiations: radiosensitization or radio-chemotherapy combination]. Bull Cancer. 2002 Apr;89(4):369-79. French. PMID 12016038
• BACKGROUNDCaffo O, Fellin G, Graffer U, Valduga F, Bolner A, Luciani L, Tomio L, Galligioni E. Phase I study of gemcitabine and radiotherapy plus cisplatin after transurethral resection as conservative treatment for infiltrating bladder cancer. Int J Radiat Oncol Biol Phys. 2003 Dec 1;57(5):1310-6. doi: 10.1016/s0360-3016(03)00763-6. PMID 14630267
• BACKGROUNDChauvet B, Brewer Y, Felix-Faure C, Davin JL, Choquenet C, Reboul F. Concurrent cisplatin and radiotherapy for patients with muscle invasive bladder cancer who are not candidates for radical cystectomy. J Urol. 1996 Oct;156(4):1258-62. PMID 8808849
• BACKGROUNDChauvet B, Davin JL, Alfonsi M, Berger C, Vincent P, Reboul F. [Conservative treatment of bladder cancers with radiotherapy and concurrent chemotherapy: results and perspectives]. Cancer Radiother. 1998 Sep-Oct;2(5):499-504. doi: 10.1016/s1278-3218(98)80058-9. French. PMID 9868392
• BACKGROUNDChoudhury A, Swindell R, Logue JP, Elliott PA, Livsey JE, Wise M, Symonds P, Wylie JP, Ramani V, Sangar V, Lyons J, Bottomley I, McCaul D, Clarke NW, Kiltie AE, Cowan RA. Phase II study of conformal hypofractionated radiotherapy with concurrent gemcitabine in muscle-invasive bladder cancer. J Clin Oncol. 2011 Feb 20;29(6):733-8. doi: 10.1200/JCO.2010.31.5721. Epub 2011 Jan 4. PMID 21205754
• BACKGROUNDDunst J, Sauer R, Schrott KM, Kuhn R, Wittekind C, Altendorf-Hofmann A. Organ-sparing treatment of advanced bladder cancer: a 10-year experience. Int J Radiat Oncol Biol Phys. 1994 Sep 30;30(2):261-6. doi: 10.1016/0360-3016(94)90003-5. PMID 7928455
• BACKGROUNDEnsign LG, Gehan EA, Kamen DS, Thall PF. An optimal three-stage design for phase II clinical trials. Stat Med. 1994 Sep 15;13(17):1727-36. doi: 10.1002/sim.4780131704.