Cancer cells are a type of mutated cell that are the pathogenic cause of cancer. Unlike normal cells, cancer cells have three main characteristics: unlimited proliferation, transformability, and metastasis, allowing them to proliferate indefinitely and destroy normal cell tissues.
Aside from their uncontrolled division (capable of multipolar division), cancer cells can also locally invade surrounding normal tissues and even migrate to other parts of the body through the body's circulatory or lymphatic systems.
The process by which cancer cells migrate to other parts of the body via the circulatory or lymphatic systems is commonly referred to as cancer cell metastasis or spread.
Cancer cells encounter many difficulties during the metastasis process, having to undergo mutation dozens of times, then overcome the adhesive effects between cells to detach, and alter their shape to pass through dense connective tissues.
