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Folinic Acid

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Patients randomized in control arm A will receive four cycles of neoadjuvant chemotherapy with FLOT every two weeks (5-FU 2600 mg/m² d1, folinc acid 200 mg/m² d1, oxaliplatin 85 mg/m² d1, docetaxel 50 mg/m² d1) followed by surgical resection 4-6 weeks after day 1 of the last cycle of neoadjuvant therapy. 6-12 weeks after surgery adjuvant chemotherapy starts with 4 cycles of FLOT (total treatment period 25-32 weeks).

Patients randomized in experimental arm B will receive two cycles of neoadjuvant induction chemotherapy with FLOT (5-FU 2600 mg/m² d1, folinic acid 200 mg/m² d1, oxaliplatin 85 mg/m² d1, docetaxel 50 mg/m² d1) every two weeks (4 weeks of therapy) followed by radiochemo-therapy beginning at day 21 after day one of the last cycle of chemotherapy. Radiochemotherapy consists of oxaliplatin 45 mg/m² weekly (d1, 8, 15, 22, 29) and continuous infusional 5-FU 225 mg/m² plus concurrent radiotherapy given in 5/week fractions with 1.8 Gy to a dose of 45 Gy over 5 weeks. Resection is performed 4-6 weeks after last treatment with chemotherapy / radiation. Adjuvant treatment starts 6-12 weeks after surgery and consists of 4 cycles of FLOT (total treatment period of 26 - 33 weeks).

5-Fluorouracil

Calcium folinate

25 fractions (5 each week over 5 weeks) each 1,8 Gy to a total of 45 Gy

Radiation

Day 1, 8, 15, 22, 29: 45 mg/m² IV over 2 hours

Oxaliplatin during radiotherapy

day 1 - 33: 225 mg/m²/day IV continuously

5-Fluorouracil during radiotherapy

Ralf-Dieter Hofheinz, Prof. Dr.

This is a multicenter, prospective, randomized, stratified, controlled, open-label study comparing neoadjuvant radiochemotherapy with FLOT versus FLOT chemotherapy alone für patients with locally advanced, potentially resectable adenocarcinoma of the gastroesophageal junction (GEJ)

The RACE trial seeks to demonstrate superiority of preoperative FLOT induction chemotherapy followed by preoperative radiochemotherapy and postoperative FLOT chemotherapy over perioperative FLOT chemotherapy without radiotherapy in patients with adenocarcinoma of the gastroesophageal junction undergoing adequate oncological surgery.

Eligible patients will be randomly allocated to one of two treatment groups, i.e. preoperative chemotherapy (Arm A) or preoperative chemotherapy with subsequent preoperative radiochemotherapy (arm B), both followed by resection and postoperative completion of chemotherapy. Randomization will occur in a 1:1 ratio with stratification by primary tumor site (Siewert I vs. Siewert II/III).

Arm A:

Patients randomized to Arm A (control arm) will be treated with four preoperative cycles of FLOT. Cycles will be repeated every two weeks. The preoperative chemotherapy duration in Arm A is eight weeks. Surgical resection will follow 4-6 weeks after day 1 of the last cycle of neoadjuvant therapy. Postoperative chemotherapy will start 6-12 weeks after surgery and consists of another four cycles of FLOT every two weeks. The total treatment period is 25-32 weeks.

Arm B:

Patients randomized in Arm B (experimental arm) will be treated with two cycles of FLOT every two weeks. Radiochemotherapy will start three weeks after day 1 of the second cycle and consists of oxaliplatin and infusional 5-fluorouracil plus concurrent radiotherapy given to a dose of 45 Gy (25 daily fractions with 1.8 Gy) over five weeks. The preoperative treatment duration is 10 weeks. Surgical resection will follow 4-6 weeks after last treatment with chemotherapy / radiation. Postoperative chemotherapy will start 6-12 weeks after surgery and consists of four cycles of FLOT every two weeks. The total treatment period is 26-33 weeks.

Neoadjuvant RCT Versus CT for Patients With Locally Advanced, Potentially Resectable Adenocarcinoma of the GEJ

RACE-trial: Neoadjuvant Radiochemotherapy Versus Chemotherapy for Patients With Locally Advanced, Potentially Resectable Adenocarcinoma of the Gastroesophageal Junction (GEJ) A Randomized Phase III Joint Study of the AIO, ARO and DGAV

to compare PFS in patients with resectable GEJ adenocarcinoma receiving perioperative FLOT alone versus perioperative FLOT combined with neoadjuvant radiochemotherapy where PFS ist defined as the time from randomization to disease progression or disease recurrence after surgery or death from any cause

Overall survival (OS) where OS is defined as the time from randomization to death from any cause

R0 resection rate where R0 resection is defined as microscopically margin negative resection with no gross or microscopic tumor remains in the areas of the primary tumor and/or samples regianal lymph nodes based on evaluation by the local pathologist.

Number of harvested lymph nodes during surgery

Site of tumor relapse if tumor recurrence/relapse occurs

Overall survival rate is defined as the proportion of patients known to be alive at 1, 3 or 5 years after randomization

Spots Global Cancer Trial Database for oxaliplatin during radiotherapy