Circulating Tumor Cells in Solid Tumors

The primary purpose of this correlative study is to create a prospective database documenting the quantity and characterization of circulating tumor cells (CTCs) in solid tumor patients as identified by a various laboratory techniques and analyses. The investigators are developing this resource to provide data to achieve the following objectives: 1) correlate CTCs with known prognostic factors, 2) correlate CTCs with burden of disease, 3) evaluate the ability of CTCs to be used in the surveillance of disease recurrence, and 4) evaluate CTCs ability to be used as a biomarker for treatment response.