Pre-operative Chemotherapy Plus Bevacizumab With Early Salvage Therapy Based on PET Assessment of Response in Patients With Locally Advanced But Resectable Gastric and GEJ Adenocarcinoma

"Patients with FDG avid locally advanced but resectable gastric or GEJ adenocarcinoma will receive preoperative therapy with epirubicin, cisplatin, capecitabine (ECX), and bevacizumab. Each cycle of therapy is 21 days. Near the completion of cycle 1 of therapy (eg during week 3, target days 18-21), patients will undergo a second FDG-PET/CT scan. Note, patients will hold capecitabine for 48 hours prior to the FDG-PET/CT scan.~Patients with a good metabolic response (eg. \> 35% reduction in FDG uptake at the primary tumor on the week 3 PET scan as compared with baseline FDG uptake) will continue ECX for 2 additional cycles (cycle 2 and 3).~Cycle 2 will be administered with bevacizumab and cycle 3 will be administered without bevacizumab. Patients will then proceed to surgery approximately 4-6 weeks following the completion of cycle 3. There is a 10-12 week time interval (eg. 70-84 days) between the last bevacizumab treatment and surgery."