Clinical transfusion medicine is an evolving subspecialty, which straddles traditional areas of pathology and clinical hematology. This subspecialities is concerned with aspects of blood procurement, including safety, logistics and economics, and the appropriate use of blood products in different clinical situations. This causes the transfusion medicine physician to interact with (and occasionally come into conflict with!) surgeons, anesthesiologists, internists, and many subspecialists in internal medicine, particularly, oncologists and hematologists
