Splenic nodules. Chronic nodular hyperplasia. Common in old dogs. Neoplasia ... This is splenic nodular hyperplasia in. an old dog. It is a common aging change and not ... – PowerPoint PPT presentation
3 Stomach spleen Capsule trabecula Red pulp White pulp 4 http//www.defra.gov.uk/animalh/diseases/images/v2 /asfn_5.jpg Enlarged spleen (splenomegaly) on top and normal spleen on bottom 5 Splenomegaly
Diffuse whole organ
Blood collecting passively
Production of red and white blood cells
6 Splenomegaly. There is generalized enlargement of this cat spleen. The organ is bulging and has rounded edges. 7 Splenomegaly. The diffuse enlargement of this horse spleen is inflammation caused by the equine infectious anemia virus 8 Splenic nodules
Chronic nodular hyperplasia
Common in old dogs
Hemangiosarcoma (tumor of blood vessels)
Lymphosarcoma (tumor of lymphocytes)
9 There is focal nodular enlargement of this dog spleen. This is splenic nodular hyperplasia in an old dog. It is a common aging change and not associated with cancer or inflammation. 10 The nodules on this horse spleen are caused by cancerous lymphocytes. This is lymphosarcoma. 11 The dark nodules on this horse spleen are caused by a tumor of melanocytes. This is malignant melanoma. 12 The pale areas in this cow spleen are due to inflammation caused by a bacterial infection. 13 End of Module 2
Proceed to Module 3 Pathology of the liver.
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