Changes

==Introduction==

==Introduction==

==Pathology==

==Pathology==

===Thymoma===

===Thymoma===

Thymomas are '''benign''' and '''localised'''. They are most commonly seen in '''cats'''.

Thymomas are '''benign''' and '''localised'''. They are most commonly seen in '''cats'''. Their cell type can be either predominantly '''epithelial''', or predominantly '''lymphocytic'''.

Their cell type can be either be predominantly '''epithelial''', or predominantly '''lymphocytic'''

===Thymic lymphosarcoma===

===Thymic lymphosarcoma===

Thymic lymphsarcoma is a '''malignant''' tumour that often '''metastasises'''. Involvement of the lung is unusual. It is also known as [[Lymphoma|mediastinal lymphoma]] - for more information on the disease, click [[Lymphoma|here]].  

Thymic lymphsarcoma is a '''malignant''' tumour that often '''metastasises'''. Involvement of the lung is unusual. It is also known as [[Lymphoma|mediastinal lymphoma]].  

Normally the mass is '''poorly encapsulated''', and there may be '''infiltration''' of the atria and heart base infiltration and the sternal pleura.

Normally the mass is '''poorly encapsulated''', and there may be '''infiltration''' of the atria and heart base infiltration and the sternal pleura.

* '''Weightloss'''

* '''Weightloss'''

* '''Regurgitation'''

* '''Regurgitation'''

* '''Loss of compressability of the cranial thorax in cats'''

* '''Loss of compressibility of the cranial thorax in cats'''

* '''Displacement of heart sounds caudally'''

* '''Displacement of heart sounds caudally'''

* '''Decreased lung sounds ventrally'''

* '''Decreased lung sounds ventrally'''

* Swelling of the head and neck due to compression of the cranial vena cava

* Swelling of the head and neck due to compression of the cranial vena cava

* Horners syndrome due to compression of the sympathetic nerves within the mediastinum

* Horners syndrome due to compression of the sympathetic nerves within the mediastinum

* [[Hypercalcaemia]] - normally only present in lymphosarcoma in the dog. Signs include PU/PD, [[Vomiting|vomiting]], [[Colonic Impaction - Dog and Cat|constipation]], malaise, bradycardia, muscle tremors and [[Dehydration|dehydration]].

* [[Hypercalcaemia]] - normally only present in lymphosarcoma in the dog. Signs include polydypsia/polyuria (PU/PD), [[Vomiting|vomiting]], [[Colonic Impaction - Dog and Cat|constipation]], malaise, bradycardia, muscle tremors and [[Dehydration|dehydration]].

* [[Myasthenia Gravis]] - this can be induced by a thymoma

* [[Myasthenia Gravis]] - this can be induced by a thymoma

{{Learning

{{Learning

|flashcards = [[Feline Medicine Q&A 12]]

|flashcards = [[Feline Medicine Q&A 12]]<br>[[Small Animal Emergency and Critical Care Medicine Q&A 04]]

}}

}}

Sparks, AH & Caney, SMA (2005) '''Self-Assessment Colour Review Feline Medicine''' ''Manson''

Sparks, AH & Caney, SMA (2005) '''Self-Assessment Colour Review Feline Medicine''' ''Manson''

[[Category:Lymphoreticular and Haemopoietic Diseases]]

[[Category:Lymphoreticular and Haemopoietic Diseases]]

[[Category: To Do - Siobhan Brade]]

[[Category:Neoplasia]]

[[Category:To Do - Manson review]]

[[Category:Expert Review]]