Changes

===Cat===

===Cat===

In cats following the introduction of widespread [[Feline Leukaemia Virus|FeLV]] testing and [[vaccines|vaccination]] the most common type of lymphoma affecting cats is '''alimentary''' when previously it had been mediastinal and multicentric forms.

[[FeLV]] is an important cause of lymphoma in the cat. Following the introduction of widespread [[Feline Leukaemia Virus|FeLV]] testing and [[vaccines|vaccination]] the most common type of lymphoma affecting cats is '''alimentary''' when previously it had been mediastinal and multicentric forms.

Only 10% of lymphoma cases in cats are now associated with FeLV.

Only 10% of lymphoma cases in cats are now associated with FeLV, whereas it used to be 70%.

 

The alimentary form affects the mesenteric lymph nodes, intestine, [[Liver - Anatomy & Physiology|liver]], spleen , and potentially the kidney. The thymic form presents as a thymic mass, also in the mediastinal lymph nodes. The pleural lymph nodes and the liver may potentially be affected. Multicentric form is found in the peripheral and deep lymph nodes, liver and spleen. The kidney may sometimes be affected. There is also a renal form affecting kidneys and other abdominal organs and leukaemic form affecting the bone marrow alone, this form is rare.

===Horse===

===Horse===