Like evil-minded envoys, individual cancer cells extend themselves outward from the original cluster, probing for other cells in the area, the researchers observed. Once it detects one, the extended cell latches on and pulls it in, forming a larger mass. The activity continues, the cancerous extensions drawing in more and more cells—including healthy cells—as the tumor enlarges.
Source: Cancer riddle, solved: Researchers reveal how cancer cells form tumors
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