Changes

In the dog, multicentric lymphoma is most common representing 80% of cases. Alimentary, cutaneous, mediastinal and extranodal sites are less common. Additionally the majority of lymphoma cases in dogs are of the B-cell immunophenotype.  

In the dog, multicentric lymphoma is most common representing 80% of cases. Alimentary, cutaneous, mediastinal and extranodal sites are less common. Additionally the majority of lymphoma cases in dogs are of the B-cell immunophenotype.  

In cats following the inroduction of widespread vaccination against FeLV testing and vaccination the most common type of lymphoma affecting cats is alimentary when previously it had been mediastinal and multicentric forms.

In cats following the inroduction of widespread vaccination against [[Feline Leukaemia Virus|FeLV]] testing and [[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 is  now associated with FeLV.

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

==Signalment==

==Signalment==

The median age of affected cats  is 9-10 years and oriental breeds may be predisposed.

The median age of affected cats  is 9-10 years and oriental [[Feline Breeds - WikiNormals|cat breeds]] may be predisposed.

Affected dogs have a wide age range, most are middle-aged however young animals can be affected. There may also be a male predilection.

Affected dogs have a wide age range, most are middle-aged however young animals can be affected. There may also be a male predilection.