Editing Lymphatic system (section)

===Cancer===
[[File: Reed-Sternberg lymphocyte nci-vol-7172-300.jpg|thumbnail|[[Reed–Sternberg cell]]s ]]
{{Main|Lymphoma}}
[[Cancer]] of the lymphatic system can be primary or secondary. [[Lymphoma]] refers to cancer that arises from [[lymphatic tissue]]. Lymphoid leukaemias and lymphomas are now considered to be tumours of the same type of cell lineage. They are called "leukaemia" when in the blood or marrow and "lymphoma" when in lymphatic tissue. They are grouped together under the name "lymphoid malignancy".<ref name="FauciBraunwald2009">{{cite book| first1 = Anthony S. | last1 = Fauci | first2 = Eugene | last2 = Braunwald | first3 = Dennis | last3 = Kasper | first4 = Stephen | last4 = Hauser | first5 = Dan L. | last5 = Longo | name-list-style = vanc |title=Harrison's Manual of Medicine |url= https://books.google.com/books?id=66XKIuh8P-AC&pg=PA352 |access-date=12 November 2010 |date=19 March 2009 |publisher=McGraw Hill Professional |isbn=978-0-07-147743-7 |pages=352–}}</ref>

Lymphoma is generally considered as either [[Hodgkin lymphoma]] or [[non-Hodgkin lymphoma]]. Hodgkin lymphoma is characterised by a particular type of cell, called a [[Reed–Sternberg cell]], visible under microscope. It is associated with past infection with the [[Epstein–Barr virus]], and generally causes a painless "rubbery" lymphadenopathy. It is [[cancer staging|staged]], using [[Ann Arbor staging]]. [[Chemotherapy]] generally involves the [[ABVD]] and may also involve [[radiotherapy]].<ref name=DAVIDSONS2010B /> Non-Hodgkin lymphoma is a cancer characterised by increased proliferation of [[B-cell]]s or [[T-cells]], generally occurs in an older age group than Hodgkin lymphoma. It is treated according to whether it is ''[[Grading (tumors)|high-grade]]'' or ''low-grade'', and carries a poorer prognosis than Hodgkin lymphoma.<ref name=DAVIDSONS2010B />

[[Lymphangiosarcoma]] is a malignant [[soft tissue sarcoma|soft tissue tumour]], whereas [[lymphangioma]] is a benign tumour occurring frequently in association with [[Turner syndrome]]. [[Lymphangioleiomyomatosis]] is a benign tumour of the smooth muscles of the lymphatics that occurs in the lungs.

[[Lymphoid leukaemia]] is another form of cancer where the host is devoid of different lymphatic cells.