Intraperitoneal and Intravenous Paclitaxel Chemotherapy With Oral Capecitabine for Gastric Adenocarcinoma With Peritoneal Carcinomatosis

Brief Summary

Background: Three-fourths of people diagnosed with gastric cancer will die from it. Researchers want to see if giving cancer drugs in a new way can help people live longer and delay the time it takes for the cancer to grow. Objective: To find a better way to treat advanced stomach cancer. Eligibility: People ages 18 and older with stomach cancer that has spread throughout their belly. Design: Participants will be screened with: Medical history Physical exam Blood, urine, and heart tests Scans Cancer sample: If they do not have one, they will have a biopsy. Tests of performance of normal activities Dietary assessment Participants will have a laparoscopy. Small cuts are made into their abdomen. A thin camera with a light is inserted. Small instruments are used to take biopsies. This will be repeated during the study to monitor the cancer. During the first laparoscopy, a port with a catheter attached will be put into the abdomen. Participants may also have an endoscopy: A thin tube with a camera is inserted through the mouth and into the stomach. The tube collects samples to monitor the cancer. Participants will get paclitaxel every 3 weeks through the abdominal port and through a small plastic tube in an arm vein. They will also take capecitabine by mouth twice daily for the first 15 days of a 21-day cycle. After participants finish 3 cycles, they will have scans to see how they are doing. They may get another course of therapy. Participants will have visits every 3 weeks during treatment. Then they will have follow-up visits for 5 years. Then they will keep in touch with researchers for the rest of their life.