Abstract:Circulating tumor cells (CTCs) are essential for establishing recurrence and metastasis in malignant tumors. Detecting CTCs can help for early detection of the cancer metastases and recurrences, and also can help for evaluating prognostic and guiding treatment. CTCs detection technique mainly include screening and separation technology which contains immune magnetic separation technology and reverse transcriptasepolymerase chain reaction and so on. With the development of technique, there is a new technique named ctcchip contains both screening and separation functions.

Key words:Neoplasm circulating cells,Lung neoplasms,Detection technique