Phase II Study of Oxaliplatin, Irinotecan, and Capecitabine in Advanced Gastric/Gastroesophageal Junction Carcinoma

Inclusion Criteria

• •Patients must have histologically or cytologically confirmed gastric adenocarcinoma or adenocarcinoma of the gastroesophageal junction. Patients must have metastatic or inoperable locally advanced disease; GE Junction tumor location should be documented in the patient's medical record chart using the Siewert classification below:
• •* Type I: Adenocarcinoma of the distal esophagus which usually arises from an area with specialized intestinal metaplasia of the esophagus and which may infiltrate the GE junction from above Type II: True carcinoma of the cardia arising from the cardiac epithelium or short segments with intestinal metaplasia at the GE junction Type III: Subcardial gastric carcinoma which infiltrates the GE junction and distal esophagus from below
• •Patients must have measurable disease, defined as at least one lesion that can be accurately measured in at least one dimension (longest diameter to be recorded) as \>= 20 mm with conventional techniques or as \>= 10 mm with spiral CT scan
• •No prior chemotherapy for metastatic or recurrent disease is allowed; one course of neoadjuvant chemotherapy and/or adjuvant chemotherapy with or without radiation therapy as primary treatment is acceptable; at least 4 weeks must have elapsed since prior radiation therapy; patients must have been off previous anti-cancer therapy for at least 4 weeks
• •Life expectancy of \>= 12 weeks
• •ECOG performance status 0-2
• •Hemoglobin \>= 9.5 g/dL
• •Absolute neutrophil count \>= 1,500/uL
• •Platelets \>= 100,000/uL
• •Total bilirubin =\< 1.5 mg/dL
• •Creatinine =\< 1.5 mg/dL OR creatinine clearance \>= 60 mL/min/1.73 m\^2 for patients with creatinine levels above institutional normal
• •The effects of oxaliplatin, irinotecan, and capecitabine on the developing human fetus at the recommended therapeutic dose are unknown; for this reason and because these drugs are known to be teratogenic, women of child-bearing potential and men must agree to use adequate contraception (hormonal or barrier method of birth control; abstinence) prior to study entry and for the duration of study participation; should a woman become pregnant or suspect she is pregnant while participating in this study, she should inform her treating physician immediately
• •Ability to understand and the willingness to sign a written informed consent document