Cancer cells spread way earlier than thought, seeding metastases that cause most deaths

Cancer cells are able to spread from a nascent tumor much earlier than scientists long thought and are more adept than later emigrants at forming potentially lethal metastases at distant sites such as the brain and bones, cialis researchers reported1 in two studies published Wednesday.

The discovery offers the first molecular explanation of how that early spread occurs, hinting at why early detection and treatment often fail to prevent cancer deaths: “Early” is still too late.

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