Intra-peritoneal Environmental Changes Following Surgery

Intra-peritoneal Environmental Changes Following Colorectal Surgery for Cancer

The investigators hypothesize that the presence of tumor cells and tumor markers in peritoneal cavity are indicative for peritoneal spread during surgery, and may serve as early markers for systemic and/or intra-peritoneal recurrence of the disease and ultimately improve our understanding of tumor spread and disease recurrence.

Inclusion Criteria:

• colon and rectal cancer

Exclusion Criteria:

• none