<qa>  What is the name of the catheter that is left in the abdomen?- Group 1 - During laparotomy, after tumor removal, patients receive continuous hyperthermic peritoneal perfusion CHPP with the anti-cancer drug cisplatin. For CHPP, the cisplatin solution is heated and delivered to the abdomen through a catheter plastic tube, washed through the abdomen for 90 minutes, and then drained out of the body through another catheter. At the close of surgery, a small catheter, called a Tenckhoff catheter, is left in the abdomen and brought out through the skin. Between days 7 and 12 after surgery, one dose of fluorouracil and paclitaxel chemotherapy is delivered through this catheter. The catheter is removed following complete recovery from surgery and the patient is discharged from the hospital. Four to 6 weeks after the surgery, patients have CT scans of the chest, pelvis, and abdomen, and then begin intravenous IV, through a vein chemotherapy with oxaliplatin, 5-fluorouracil 5-FU, and leucovorin. The chemotherapy is given in 4-week courses as follows: oxaliplatin on day 1, infused over 2 hours through a vein in the arm or neck; leucovorin on days 1 and 2, infused over 2 hours, followed by 5-fluorouracil over 22 hours; leucovorin and 5-FU repeated two weeks later on days 15 and 16. This regimen is repeated two weeks later. Between each week of chemotherapy is a week break. A course of chemotherapy consists of 28 days two weeks of chemotherapy and two 1-week breaks. Patients may receive up to four courses total of 16 weeks unless their disease progresses or they cannot tolerate further doses. Doses of the chemotherapy can be reduced if the side effects are too severe. 