6) Cancer:
When dealing with cancer, people usually have the general conception that cancers are infinitely growing tumors that eventually “eat up” the body from the inside, and despite the fact that this isn’t so far-fetched as regarding solid tumors, the situation is very different in blood cancers. Blood cancers are called leukemias and the common character that defines them is the proliferation of one or more “lines” of cells that eventually invade the bone marrow, lymph nodes, the liver, the spleen and other structures impairing their function. Sometimes, it is not the cancer itself but the agents used in its treatment that cause coagulation problems or aggravate existing ones. For example, radiotherapy commonly used in blood cancers and testicular cancer can damage the bone marrow causing a drop in platelet count and increasing the risk of bleeding or easy bruising.