Trial of Panitumumab Cisplatin, Fluourouracil and Docetaxel in Locally Advanced or Metastatic Gastric Cancer

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