Hematology Hematology Hematology, also spelled haematology, is the branch of medicine concerned with the study of the cause, prognosis, treatment, and prevention of diseases related to blood. It involves treating diseases that affect the production of blood and its components, such as blood cells, hemoglobin, blood proteins, bone marrow, platelets, blood vessels, spleen, and the mechanism of coagulation. Such diseases might include hemophilia, blood clots, other bleeding disorders and blood cancers such as leukemia, multiple myeloma, and lymphoma. The laboratory work that goes into the study of blood is frequently performed by a medical technologist or medical laboratory scientist. Many hematologists
History of mental disorders especially during periods of economic decline, and during wartime in particular many patients starved to death. Soldiers received increased psychiatric attention, and World War II saw the development in the US of a new psychiatric manual for categorizing mental disorders, which along with existing systems for collecting census and hospital statistics led to the first Diagnostic and Statistical Manual of Mental Disorders (DSM). The International Classification of Diseases (ICD) followed suit with a section on mental disorders. Previously restricted to the treatment of severely disturbed people in asylums, psychiatrists cultivated clients with a broader range of problems, and between 1917