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| ==Introduction== | | ==Introduction== |
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| ==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''' | |
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| ===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]]. |
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| 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. |
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| * '''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''' |
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| * 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 |
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| {{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]] |
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| Sparks, AH & Caney, SMA (2005) '''Self-Assessment Colour Review Feline Medicine''' ''Manson'' | | Sparks, AH & Caney, SMA (2005) '''Self-Assessment Colour Review Feline Medicine''' ''Manson'' |
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| [[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]] |