Author, Donkey, Bureaucrats, Administrators
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:'''Type of lymphocyte''' - [[T cells|T-cell]], [[B cells|B-cel]] or [[Natural Killer cells|NK-cell]]
:'''Type of lymphocyte''' - [[T cells|T-cell]], [[B cells|B-cel]] or [[Natural Killer cells|NK-cell]]
:'''Time scale''' - Acute or Chronic
:'''Time scale''' - Acute or Chronic
+
+'''Prevalence'''
+
+Order of prevalence in UK: cats, dogs, cattle, pigs and sheep. In the cat and ox, viral agents have been identified as the causal agents.
+* FeLV is an important cause of lymphoma in the cat.
+** 70% of cats with lymphoma will test positive for FeLV.
+** FeLV also causes a number of non-neoplastic diseases.
+*** Anaemia.
+*** Leukopaenia.
+*** Thymic atrophy.
+* Cattle suffer both lymphosarcoma and leukosis in a variety of cytological forms.
+** Bovine lymphoma is caused by [[Bovine Leukaemia Virus]] (BLV).
+*** A retrovirus.
+*** There is a juvenile form of bovine lymphoma seen in young cattle which is not associated with BLV.
===Dog===
===Dog===
+Lymphoma is one of the prevalent neoplasms in the dog. The incidence is about 28 per 100,000 dogs. Blood of affected dogs shows neither a relative nor absolute increase in the number of lymphocytes until the late stages of the disease. When this stage is reached, poorly differentiated cells may appear in the blood.
+
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.