Doesn't suit? No problem! You can return items for up to 30 days
You won't go wrong with a gift voucher. The gift recipient can choose anything from our offer.
Up to 30 days for returns
Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Circulating tumor cells (CTCs) are cells that have detached from a primary tumor and circulate in the bloodstream. CTCs may constitute seeds for subsequent growth of additional tumors (metastasis) in different tissues.In 1869 Thomas Ashworth obeserved circulating tumor cells in the blood of a man with metastatic cancer. He postulated that cells identical with those of the cancer itself being seen in the blood may tend to throw some light upon the mode of origin of multiple tumours existing in the same person .