Not reached the primary endpoint target according to the statistical design

Investigators propose to study the effect of panitumumab when combined with an active regimen, such as DCF (Docetaxel/Cisplatin/Fluourouracil), in previously untreated patients with advanced cancer of the stomach.

Investigators propose a phase I/II study in order to evaluate the effect of panitumumab when combined with an active regimen, such as DCF (Docetaxel/Cisplatin/Fluourouracil), in chemotherapy - naive patients with advanced cancer of the stomach.

Investigators hypothesize that the addition of panitumumab to DCF regimen in advanced cancer of the stomach and gastroesophageal junction is feasible, well tolerated and could achieve an objective response rate of greater than 40%.

The 2-weekly schedule of DCF will be used as chemotherapy since a recently presented trial demonstrated a comparable efficacy but a more favourable toxicity profile comparable to the 3-weekly schedule.

Inclusion Criteria:

• Histologically proven inoperable locally advanced or metastatic adenocarcinoma of the stomach (including adenocarcinoma of the gastrooesophageal junction)
• Patient's age between 20 and 70 years old
• Measurable disease defined by RECIST criteria
• Patients with non-measurable disease could be enrolled in the phase I part of the study
• ECOG performance status ≤ 1
• Hgb ≥ 8g/dL, WBC ≥ 3 x 109/L , neutrophils count ≥ 1.5 x 109/L , platelets ≥100 x 109/L, Creatinine clearance ≥50 mL/min, Total bilirubin ≤ 1.5 X UNL, AST, ALT and ALP ≤ 2.5 x UNL
• No prior chemotherapy or more than 6 months from adjuvant chemotherapy or chemo-radiation
• Estimated life expectancy more than 3 months
• Written informed consent

Exclusion Criteria:

• Gastrointestinal bleeding
• Clinically relevant, symptomatic excessive amounts of ascites resulting in patient's discomfort
• CNS metastases
• History of hypersensitivity to fluoropyrimidines, docetaxel or platinum compounds
• Any previous chemotherapy or radiotherapy for advanced disease
• Patient pregnant or breast feeding, or planning to become pregnant within 6 months after the end of treatment
• Patient (male or female) is not willing to use highly effective methods of contraception (per institutional standard) during treatment and for 6 months (male or female) after the end of treatment
• Known hypersensitivity reaction to the component of the treatment
• Active infection or malnutrition or bowel obstruction
• Legal incapacity or limited legal capacity
• Definite contraindications for the use of corticosteroids
• History of interstitial lung disease e.g. pneumonitis or pulmonary fibrosis or evidence of interstitial lung disease on baseline chest CT scan
• Chronic inflammation of the bowel
• Clinically significant cardiovascular disease (including myocardial infarction, unstable angina, symptomatic congestive heart failure, serious uncontrolled cardiac arrhythmia) ≤ 1 year before enrollment
• Medical or psychological condition which in the opinion of the investigator would not permit the subject to complete the study or sign meaningful informed consent
• A second primary tumor other than non-melanoma skin cancer or in situ cervical cancer