Editing Blood (section)

===Hematological===
{{see also|Hematology}}
*Anemia
**Insufficient red cell mass ([[anemia]]) can be the result of bleeding, blood disorders like [[thalassemia]], or [[Illnesses related to poor nutrition|nutritional deficiencies]], and may require one or more [[blood transfusion]]s. Anemia can also be due to a [[genetic disorder]] in which the red blood cells do not function effectively. Anemia can be confirmed by a [[blood test]] if the hemoglobin value is less than 13.5&nbsp;gm/dl in men or less than 12.0&nbsp;gm/dl in women.<ref>{{cite web |url=http://www.hematology.org/Patients/Anemia/ |title=The Role of Red Blood Cells in Anemia |access-date=2017-05-22 |url-status=dead |archive-url=https://web.archive.org/web/20170518202410/http://www.hematology.org/Patients/Anemia/ |archive-date=18 May 2017 }}</ref> Several countries have [[blood bank]]s to fill the demand for transfusable blood. A person receiving a blood transfusion must have a [[blood type]] compatible with that of the donor.
**[[Sickle-cell anemia]]
*Disorders of cell proliferation
**[[Leukemia]] is a group of [[cancer (medicine)|cancers]] of the blood-forming tissues and cells.
**Non-cancerous overproduction of red cells ([[polycythemia vera]]) or platelets ([[essential thrombocytosis]]) may be [[Premalignant condition|premalignant]].
**[[Myelodysplastic syndromes]] involve ineffective production of one or more cell lines.
*Disorders of coagulation
**[[Hemophilia]] is a [[Genetic disorder|genetic illness]] that causes dysfunction in one of the blood's [[coagulation|clotting mechanisms]]. This can allow otherwise inconsequential wounds to be life-threatening, but more commonly results in [[hemarthrosis]], or bleeding into joint spaces, which can be crippling.
**Ineffective or insufficient platelets can also result in [[coagulopathy]] (bleeding disorders).
**Hypercoagulable state ([[thrombophilia]]) results from defects in regulation of platelet or clotting factor function, and can cause thrombosis.
*Infectious disorders of blood
**Blood is an important vector of infection. HIV, the virus that causes AIDS, is transmitted through contact with blood, semen or other body secretions of an infected person. [[Hepatitis B]] and [[Hepatitis C|C]] are transmitted primarily through blood contact. Owing to [[blood-borne infection]]s, bloodstained objects are treated as a [[biohazard]].
**Bacterial infection of the blood is [[bacteremia]] or [[sepsis]]. Viral Infection is viremia. [[Malaria]] and [[trypanosomiasis]] are blood-borne parasitic infections.