The failure of the dams came as a big surprise. Johnstown had constructed an entire system designed to completely eliminate the flood risk. In addition, regular inspections had turned up no defects. Still, the dams were no match for the thunderstorm that stalled over the area on July 20.
Common types of blood cancer include: 1  Leukemia: Cancer that originates in blood-forming tissue. 2  Non-Hodgkin lymphoma: Cancer that develops in the lymphatic system from cells called lymphocytes, a type of white blood cell that helps the body fight infections. Non-Hodgkin lymphoma: Cancer that develops in the lymphatic system from cells called lymphocytes, a type of white blood cell that helps the body fight infections. 2  Hodgkin lymphoma: Cancer that develops in the lymphatic system from cells called lymphocytes.
There are four types of blood cancer depending upon the course of the disease and the origin of the affected blood cells. The former criterion classifies the types into either acute or chronic.The later criterion further divides the types as lymphoblastic or lymphocytic leukemias and myeloid or myelogenous leukemias.he red blood cells provide oxygen to the entire body. The white blood cells protect our body and platelets helps in clotting of the blood in the face of injury. Irrespective of the types of the disease, any abnormality in these cell types leads to blood cancer.