Circulating Tumor Cells and Neutrophils Count for Colorectal Metastatic Cancer

Study Overview
=================
Brief Summary
-----------------
Colorectal cancer represents a major public health problem in France because of its high incidence and severe prognosis. Early stages of the disease are well know and have justified the establishment of a mass screening strategy. Unfortunately, the factors determining the progression to metastatic disease about them much harder to grasp. Various prognostic factors and predictors of treatment response have been identified and are being used but most of them are In practice, they are sometimes coarse and relatively little discriminant for patients. It is now possible to directly quantify the amount of circulating tumor cells in peripheral blood. Quantification of circulating tumor cells beyond a threshold of 3 cells/7,5 ml has been established as a major prognostic factor, and the rapid decrease in the number of these cells under treatment is also a predictor of response for patients suffering from metastatic colorectal cancer . Furthermore, it has also been shown that the quality and importance of the systemic and peritumoral inflammatory response in carcinomas, including colorectal, played a key role in the prognosis of patients. In particular, the presence of high levels of blood neutrophils has been raised by many studies as being followed by a poorer prognosis. However, the correlation between the presence of circulating tumor cells and high levels of neutrophils has never been studied. There is a rational to assume that this association exists, and secondly that the presence of circulating tumor cells in a proinflammatory environment represented by a high levels of blood neutrophils promotes metastasis by exerting a negative synergistic effect on the prognosis of patients. The main objective of this pilot study is to find a correlation between the amount of circulating neutrophils and the presence of circulating tumor cells in patients with colon cancer metastatic unresectable non-pretreated. The secondary objective is to investigate whether this association results in a negative synergistic effect in terms of progression-free survival and survival to one year. This is a non-interventional study. The investigators expect the inclusion in one year of thirty patients in two centers (University Hospital Centre Antoine Lacassagne Nice) to achieve these goals.

Official Title
-----------------
Circulating Tumor Cells and Neutrophils Count for Colorectal Metastatic Cancer

Conditions
-----------------
Metastatic Colorectal Cancer

Participation Criteria
=================
Eligibility Criteria
-----------------
Inclusion criteria: Age > 18 years Metastatic colorectal cancer Chemotherapy required Measurable scannographic target CT-scan < 3 weeks Written consent Non-inclusion criteria : Personal history of invasive carcinoma Prior chemotherapy regimen Treatment with G-CSF analogs Corticotherapy Exclusion criteria: • Consent withdrawal

Ages Eligible for Study
-----------------
Minimum Age: 19 Years

Sexes Eligible for Study
-----------------
All

Accepts Healthy Volunteers
-----------------
No

Study Plan
=================
How is the study designed?
-----------------
What is the study measuring?
-----------------
Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Research of an association between polymorphonuclear count (number of cells per liter) and circulating tumor cells number (number of circulating tumor cells per 7,5 mililiters. |  | one time | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Research of a synergistic effect between high polymorphonuclear count and high level of circulating tumor cells on progression-free survival and overall survival. Progression will be defined according to RECIST criteria. |  | one time |