Because of the nature of blood, the science of hematology profoundly affects the understanding of many diseases. If your physician has recommended that you see a hematologist, it may be because you are at risk for a condition involving your red or white blood cells, platelets, blood vessels, bone marrow, lymph nodes, or spleen. Some of these conditions are: hemophilia, a disease that prevents your blood from clotting. Hematology instruments are machines that analyze blood. Used in medical labs, hematology instruments can do blood counts, detect proteins or enzymes, and help to diagnose illnesses or genetic defects. The instruments include analyzers, flow cytometers, coagulation analyzers, and slide stainers. One of the most common hematology tests is the complete blood count, or CBC. This test is often conducted during a routine exam and can detect anemia, clotting problems, blood cancers, immune system disorders and infections Hematology studies are one of the most important studies to knoe about blood related ailments and to carry out proper testing and therapies various blood related diseases can be cured. Some common blood cancer symptoms include: Fever, chills. Persistent fatigue, weakness. Loss of appetite, nausea.