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[[Image:tonguelymphoma.gif|right|thumb|125px|<small><center>Tongue Lymphoma - a recognised entity (Courtesy of Alun Williams (RVC))</center></small>]][[Category:Tongue_-_Pathology]]
[[Image:tonguelymphoma.gif|right|thumb|125px|<small><center>Tongue Lymphoma - a recognised entity (Courtesy of Alun Williams (RVC))</center></small>]][[Category:Tongue_-_Pathology]]
==Description==
* Localised lymphoma: can be intramural or extend intraluminally. The lesion may be focal or multifocal. The tumour can be of a variety of shapes namely nodular, plaque-like or circumferential. Circumferential transmural or intramural tumours often bulge outward since the diseased muscle atrophies so that rows of lymphocytes remain supported by parallel bands of reticulum fibers only. The circumferential intramural form is the most frequently seen in the feline intestine.
* Diffuse lymphoma: with these tumours there is a granular or cobblestone appearance to the mucosa. The mesenteric lymph nodes are often affected.
* In cats the most frequent sites are the jejunum, ileocaecocolic junction, duodenum, colon and stomach (in decreasing order of frequency).
* In dogs focal lesions most frequently occur in the small intestine. Multifocal tumours are rarer and affect various sites.
* At the time of diagnosis in cats tumour nodules are often already apparent in the liver, kidney, spleen and abdominal and sternal lymph nodes. Differentiating AL and multicentric lymphoma may be difficult at this point.
* In most cats AL is not associated with FeLV and aetiololgy is idiopathic.
==Signalment==
Affected cats are usually over 5 years old and oriental breeds may be predisposed.
Affected dogs have a wide age range, most are middle-aged however young animals can be affected. There may be a male predilection.
==Gastric==
==Gastric==
* Diffuse infiltration of [[Lymphocytes|lymphocytes]].
* Diffuse infiltration of [[Lymphocytes|lymphocytes]].
==Diagnosis==
==Diagnosis==