A study on the detection of circulating tumor cells (CTC) in patients with resected pulmonary metastases from colorectal cancer and its clinical significance as a biomarker

Interventions: Peripheral blood samples will be drawn from CRC patients with PM prior to operation and will be tested for CTC enumeration. Primary outcome(s): CTC positivity rate for patients having undergone resection of PM from CRC Study Design: Single arm Non-randomized