Inclusion Criteria:  Cancer patients scheduled to undergo major abdominal surgery for gastrointestinal (GI) malignancies. GI procedures include esophagectomy, gastrectomy, colectomy, abdominoperineal resection/low anterior resection, hepatectomy, pancreatectomy (distal or pancreaticoduodenectomy), and cytoreductive surgery for peritoneal carcinomatosis. We will include patients scheduled for an ostomy (colostomy or diverting ileostomy) Age 18 years or older Ability to read and understand English or Spanish We are targeting patients across all stages of disease Age criterion for this study is based on the National Institute of Health (NIH)'s age criteria, which defines an adult as individuals aged 18 years and over. There are no restrictions related to performance status or life expectancy All subjects must have the ability to understand and the willingness to sign a written informed consent  Exclusion Criteria:  Subjects, who in the opinion of the investigator, may not be able to comply with the safety monitoring requirements of the study