What is Tumors of the hematopoietic and lymphoid tissues?
[[File:ALL - Peripherial Blood - Diagnosis - 01.jpg|thumb|right|Enlarged image of blood cancer|223x223px]] [[File:Diagram showing cancer cells spreading into the blood stream CRUK 448.svg|thumb|225x225px]] '''Blood cancer''' is a type of [[cancer]] or [[tumor]]. Blood cancer hurts the [[blood]], [[bone marrow]], [[lymph]], and [[lymphatic system]]. Sometimes more than one body part is hurt. The cause is usually different from other types of cancer. The way to find out if a person has this cancer is also different. People with blood cancers see a kind of doctor called a [[hematologist]] (blood doctor) or [[oncologist]] (cancer doctor). There are other blood problems that are not blood cancers. A blood doctor also helps people with those problems. == Medical terms == [[Tumor]]s of the [[hematopoiesis|hematopoietic]] (blood cell forming) and [[lymphatic system|lymphoid]] tissues are local growths. Hematopoietic and lymphoid ''[[malignant|malignancies]]'' are [[cancer]]s that affect the [[blood]], [[bone marrow]], [[lymph]], and [[lymphatic system]].<ref>{{cite journal|last=Vardiman J.W. ''et al'' 2009 |title=The 2008 revision of the World Health Organization (WHO) classification of myeloid neoplasms and acute leukemia: rationale and important changes.|journal=Blood |year=2009|volume=114|issue=5|pages=937–51|pmid=19357394|doi=10.1182/blood-2009-03-209262|s2cid=3101472 }}</ref><ref name=WCR2014>{{cite book|title=World Cancer Report 2014.|url=https://archive.org/details/worldcancerrepor0000unse_p0u5|date=2014|publisher=World Health Organization|isbn=978-9283204299|pages=Chapter 5.13}}</ref> As the blood and lymph connect through both the [[circulatory system]] and the [[immune system]], a disease affecting one will often affect the others as well. === Types === There are three types: * [[Leukemia]] * [[Lymphoma]] * [[Multiple myeloma]] ==Finding out== A doctor will do some tests to find out if a person has a blood cancer. One common test is a complete [[blood count]]. The cells that circulate in the bloodstr