Routine blood tests can detect a variety of diseases, such as infectious diseases, such as pneumonia, which can result in abnormally high white blood cell counts and abnormally high neutrophil counts, often with normal hemoglobin and platelet counts. Secondly, routine blood tests can detect numerous anemic diseases, such as aplastic anemia, which can result in a decrease in red blood cells and a decrease in the number of white blood cells and platelets. In addition, routine blood tests can also detect some acute leukemias. Acute leukemia is characterized by an abnormally high number of white blood cells in the peripheral blood, as well as anemia and thrombocytopenia. Routine blood tests can also detect thrombocytopenic disorders, such as immune thrombocytopenia, in which the number of platelets in the peripheral blood is severely reduced but the white blood cells and hemoglobin are normal. Therefore, routine blood tests can make a general determination of most hematologic disorders.