Development of a Prospective Clinicobiological Database in Metastatic Digestive Cancers

Digestive cancers account for 30% of all cancers. The most common of these colorectal cancer (CRC) is the third most common cause of cancer in the world.

In the metastatic phase, patients with digestive cancers generally benefit from medical treatment based on cytotoxic chemotherapy, which can be combined with targeted therapy in certain locations. Their use is based on demonstrating a significant improvement in the overall survival of patients.

However, the therapeutic choice and follow-up of these treatments as a the first line treatment and beyond remain difficult given a cruel lack of biomarkers capable of predicting the response to these different molecules upstream but also usable during treatment to evaluate their efficacy or identify the development of secondary resistance mechanisms.

Indeed, the only biomarkers currently validated and used before the initiation of anti-cancer treatment to stratify patients are:

• the search for mutations in Kirsten rat sarcoma viral oncogene homolog (KRAS) and neuroblastoma rat sarcoma viral oncogene (NRAS) oncogenes as predictive factors for non-response to anti-Epidermal Growth Factor receptor (EGFR) in colorectal adenocarcinomas.
• the search for overexpression of the human epidermal growth factor (HER2) receptor to introduce trastuzumab treatment in esophageal adenocarcinomas.