Hematology- Oncology is the field of medicine identical to the study of diagnosis, cure and prevention of blood diseases and cancer. It includes such disorders as iron deficiency anemia, hemophilia, sickle cell disorder, the thalassemia, leukemia and lymphoma. The study of hematology organize clinical and laboratory medicine. Leukemia affects your white blood cells. These are major, infection-fighting element of your immune system, made in your bone marrow. The carcinogenic pattern affecting the lymphocytes is called as lymphoma. As part of Myeloma, the plasma is damaged by the tumor cells. Blood cancers can cause various symptoms. Some are collective across all blood cancers; others are more peculiar types of blood cancer. For example, lymphomas can be identified by swollen lymph nodes and one of the most common symptoms of myeloma is bone pain, especially in the back.