Hematology is the science which deals with blood and its disorders and blood forming organs and this science includes the diagnosis, treatment, prevention towards diseases related to blood and malignance`s like hemophilia, leukemia, lymphoma and sickle-cell anemia. Hematology mainly focuses on blood components like blood cells, hemoglobin, blood proteins, bone marrow, spleen and coagulation mechanism. Hematologists make sure of blood levels if the levels either highly elevated or depleted physician go with bone marrow aspiration. Varying or low rates of synthesis in haemoglobin leads to anaemia and also bleeding disorders and failure of coagulation mechanism, polycythaemia a disease condition where we can observe elevation of red blood cells Hematologists treat this state by employing phlebotomy taking the root cause into consideration that is reducing the haematocrit levels all these conditions come under Hematopathology. Physicians who work on treating hematologic disorders, referred to as Hematologists. Some Hematologists also maintains laboratory who were referred hematopathologists they work on to formulate the best diagnosis for treating hematologic disorders, in some cases Hematologists as well hematopathologists both work in conjugation for giving the best therapy.