Phase II Study of Hypofractionated Radio-chemotherapy With Gemcitabine Plus Oxaliplatin for Unresectable Nonmetastatic Locally Advanced Pancreatic Cancer.

• Status: Completed
• Trial end date: 2016-12-01

Summary

Title: Phase II study of hypofractionated radio-chemotherapy with gemcitabine plus oxaliplatin for unresectable nonmetastatic locally advanced pancreatic cancer.

Protocol code: IRST157.01

Phase: II

Study Design: monocentric, prospective, open-label not randomized trial.

Description of Study Treatment: radio-chemotherapy schedule

• GEMOX: Gemcitabine (GEM) 1000 mg/m2, day 1, and Oxaliplatin (OX) 100 mg/m2, day 2, every 2 weeks for 4 cycles.

• Hypofractionated radiotherapy (35 Gy in 7 fractions in 9 consecutive days, one session per day excluding Saturday and Sunday) administered 15 days after the 4th chemotherapy cycle.

• Further 4 cycles of GEMOX, starting 7-15 days after the end of the radiotherapy.

Objectives:

Step A: primary objective = to evaluate the safety of radiotherapy treatment. Secondary objective = the control of IM (internal margin) intra-fraction.

Step B: primary objective = to evaluate the proportion of the resectable patients after radio-chemotherapy. Secondary objectives = overall Response Rate (ORR); safety profile of combinated treatment;overall survival (OS); local progression free survival (LPFS) and progression free survival (PFS).

Statistical Considerations:

Step A:

Assuming that the probability to observe a toxicity involving the radiotherapy treatment discontinuation with the new treatment is less than 20%, 11 patients are to be evaluated for toxicity. If no toxicity involving the radiotherapy treatment discontinuation will be observed in 11 patients, the treatment can be considered safe with a probability > 90%. If 1 toxicity involving the radiotherapy treatment discontinuation will be observed, 7 more patients needs to be recruited. If no further toxicity involving the radiotherapy treatment discontinuation occurs, the treatment could be considered safe with a probability ≥ 90%.

If 2 or more toxicity involving the radiotherapy treatment discontinuation on 11 patients or 2 or more toxicity involving the radiotherapy treatment discontinuation on 18 patients will be observed, the study will be stopped because not safe and another kind of radiotherapy schedule must be designed.

Step B:

If the radiotherapy treatment will be considered no toxic, the study will continue in Step B : the goal of this phase II study is to increase the proportion of resectable patients of at least 15% with the new radio-chemotherapeutic treatment. By using the single-stage design (Gehan EA, J Chron Dis 1961) a total of 40 patients is required to be recruited in 2 years, and a further one-year period of follow-up is requested. If at least 7 patients out of 40 enrolled will be resectable, the hypothesis that the proportion of resectable patients will be less or equal to P1 (P1=the proportion of resectable patients with the new radio-chemotherapeutic treatment) will be refused and the treatment could be considered active.

• Phase: Phase 2

Details

• Lead Sponsor: Istituto Scientifico Romagnolo per lo Studio e la cura dei Tumori
• Treatments: Gemcitabine; Oxaliplatin