Why are cancer cells attracted to the bone marrow?

Dr Eva Szegezdi's article for RTE brainstorm discusses how the Bone Marrow can act as a protective environment for cancer cells helping them grown and hide from chemotherapeutic drugs. Eva also discusses current research efforts to develop new drugs that (1) force cancer cells out of the bone marrow where they can be killed by chemotherapeutic drugs or (2) that stop the bone marrow producing signals that help the cancer cells to survive and grow.

See her article here