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 main types of thyroid cancer (papillary, follicular, medullary and anaplastic), but the vast majority of cases are either papillary or follicular. 1  Papillary thyroid cancer is the most common type of thyroid cancer, accounting for 70 to 80 percent of all cases. It is most commonly diagnosed in women 30-40 years old and most frequently spreads to cervical (neck) lymph nodes.