Migrating sarcoma cancer cells. Coloured scanning electron micrograph (SEM) of cancer cells migrating down pores in the filter on which they have been cultured. The movement of cancer cells around the body (metastasis) is an important part of a cancer's malignancy. Research into this movement intends to find ways to prevent cells from moving around the body. Sarcomas are cancers of the connective tissues, which include muscles, blood vessels, nerves and fat. The flattened processes on the edges of the cells allow them to move to other parts of the body. The movement of cancer cells around the body is an important part of a cancer's malignancy. Sarcomas are a rare type of cancer and are often hard to detect. Magnification: x1000 when printed 10 centimetres wide.