- Chemotherapy (Cisplatin) will be given to after recovery from surgery. It will be given once per week at the same time as patients begin receiving the radiation treatment for the first 4 weeks. The chemotherapy will be given through the catheter (tube) that was placed under the skin during surgery and will not be visible. Patients will receive medication prior to the chemotherapy to prevent nausea, vomiting, and possible allergic reaction. Each infusion of chemotherapy will take approximately 60 minutes. After patients receive the drug we will ask to change positions to ensure that the drug comes in contact with all parts of the abdomen.