Studying the PAGODA Algorithm for Chemotherapy Dose Changes to Prevent Unplanned Treatment Delays

Inclusion Criteria

• * REGISTRATION ELIGIBILITY CRITERIA (STEP 1) ** Histologic confirmation of invasive cancer that is confirmed or suspected to arise from the gastrointestinal (GI) tract ** Any stage for which FOLFOX-based chemotherapy is a clinically-indicated, standard-of-care treatment (adjuvant, neoadjuvant, or first-line chemotherapy) ** Eligible primary tumor sites include the esophagus, gastroesophageal junction, stomach, small intestine, ampulla of Vater, appendix, colon, rectum, and cancers of unknown primary with suspected GI origin ** Prior systemic therapy for GI cancer (other than cycle 1 of FOLFOX-based chemotherapy) is not allowed. Prior radiation-sensitizing chemotherapy is permitted ** The planned duration of FOLFOX-based chemotherapy must be at least four cycles (1 cycle = 14 days) ** Cycle 1, day 1 of FOLFOX-based chemotherapy must be completed 1 to 8 days prior to registration ** Cycle 1, day 1 of FOLFOX-based chemotherapy must include minimum ordered doses of oxaliplatin (≥ 65 mg/m^2) and infusional 5-FU (2400 mg/m^2/46 hours). Use of the 5-FU bolus is at the discretion of the treating physician ** Patients who require primary prophylactic white blood cell growth factor with cycle 1 of FOLFOX chemotherapy due to high risk for fever and neutropenia are not eligible ** History of hypersensitivity reaction to oxaliplatin or other platinum-based drugs, to fluorouracil, or to leucovorin, and the excipients in their formulations are not eligible ** Age ≥ 18 years ** ECOG performance status ≤ 2 ** Absolute neutrophil count (ANC) ≥ 1,000/mm^3 ** Platelet count ≥ 100,000/mm^3 ** Total bilirubin ≤ 3 x upper limit of normal (ULN) ** AST (SGOT)/ALT (SGPT) ≤ 5 x upper limit of normal (ULN) ** Calc. creatinine clearance ≥ 30 mL/min ** Not pregnant and not nursing, because this study involves agents that have known genotoxic, mutagenic and teratogenic effects. Therefore, for women of childbearing potential only, a negative pregnancy test done ≤ 30 days prior to registration is required ** Patients with treated brain metastases are eligible if follow-up brain imaging after CNS-directed therapy shows no evidence of progression ** Patients with known HIV infection are eligible if receiving effective anti-retroviral therapy with undetectable viral load within 6 months prior to registration ** Patients with known chronic hepatitis B virus (HBV) infection are eligible if HBV DNA is undetectable when measured within 6 months prior to registration ** Patients with a known history of hepatitis C virus (HCV) infection are eligible if HCV RNA is undetectable when measured at least 12 weeks after completion of antiviral therapy ** Patients with known history or current symptoms of cardiac disease are eligible if the New York Heart Association Functional Classification is class I or II ** Patients with a known history of congenital long QT syndrome are ineligible ** Patients with known DPD deficiency are ineligible
• * NON-PATIENT (ONCOLOGY PHYSICIAN OR ONCOLOGY ADVANCED PRACTICE PROVIDER ELIGIBILITY: ** The non-patient provider participant is a medical oncologist or oncology advanced practice provider with responsibility for signing and making necessary modifications to chemotherapy orders for a subject assigned to the intervention arm (Arm B). Non-patient participants may not be enrolled more than once over the course of the study ** The non-patient participant must be proficient in the English language ** The non-patient participant must be age 21 years or older