Path E1/3

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  1. What genetic disorder of horses involves the failure of functional B and T lymphocyte production and results in the death of a foal (adenovirus) before 5 months of age?
    Equine CID
  2. What are some responses to injury of the thymus?
    • Lymphoid atrophy
    • Neoplasia
    • Hemorrhage and hematomas
  3. What are some degenerative disorders of the thymus?
    • Viruses
    • Toxins
    • Chemotherapeutic agents and radiations
    • Malnutrition
    • Aging
  4. What are some viruses that can cause thymus degeneration?
    • Canine distemper virus
    • EHV-1 in aborted foals
    • Feline parvovirus
    • FIV
    • BVDV
    • HC
  5. What are some toxins that can cause degeneration of the thymus?
    • Halogenated aromatic hydrocarbons
    • Fumonisins B1 and B2
    • Aflatoxins (pigs)
  6. What type of lymphoma is usually seen in the cranial mediastinum of beef cattle (6-24 months)?
    Bovine thymic lymphoma
  7. What type of lymphoma is usually seen as white or gray mediastinal masses in the cat with pleural fluid accumulation?
    Feline thymic lymphoma
  8. What type of benign neoplasia is a tumor of epithelial cells arising in the cranial mediastinum of older animals?
  9. What is the etiology behind dogs suffereing from thymic hemorrhage and hematomas?
    • Rupture of dissecting aortic aneurysms
    • Trauma from automobile accidents
    • Ingestion of rodenticides
  10. What etiologies can cause congestion leading to uniform "bloody" spleen?
    • Torsion
    • Barbiturate euthanasia
    • Sedation
    • Electric stunning of pigs
  11. What etiologies can cause acute hyperemia leading to uniform "bloody" spleen?
    • Septicemia
    • Inflammation
    • Anthrax
  12. What etiologies can cause acute hemolytic anemias leading to uniform "bloody" spleen?
    • Babesiosis
    • Equine infectious anemia
  13. What are some conditions that lead to a uniform splenomegaly with a "meaty" consistency?
    • Bacteremias and low grade septicemias
    • Chronic infectious diseases
    • Prolonged hemolytic anemias
    • Lymphoid hyperplasia
    • Neoplasia
    • Stored deposits of material (lysosomal and amyloid)
    • Extramedullary hematopoiesis
    • Splenic myeloid metaplasia
  14. What are some conditions that can lead to splenic nodules with a bloody consistency?
    • Hematomas induced by lymphoid hyperplastic nodules
    • Hematomas induced by splenic vascular neoplasms
    • Incompletely contracted areas of the spleen
    • Vascular neoplasms
    • Acute splenic infarcts
  15. What condistions can lead to splenic nodules with a firm consistency?
    • Nodular hyperplasia
    • Primary neoplasms
    • Metastatic neoplasms
    • Granulomas
    • Abscesses
  16. What are some conditions that can lead to small spleens?
    • Deveolomental anomalies (immunodeficiency diseases and accessory spleens)
    • Aging changes (lymphoid atrophy
    • Wasting and or cachetic disease (starvation)
    • Splenic contraction
  17. What developmental disorder results in hypoplasia of lymph nodes and an immunodeficiency in dogs and horses?
  18. What condition is usually due to regional LN draining an inflammatory site and becoming infected?
    Acute lymphadenitis
  19. What type of lymphadenitis is usually caused by Corynebacterium psudotuberculosis with abscess formation?
    Chronic suppurative lymphadenitis
  20. What type of lymphadenitis is usually caused by tuberculosis (Mycobacterium) in pigs and cattle or bovine Johne's disease?
    Focal granulomatous lymphadenitis
  21. What type of lymphadenitis is usually caused by blastomycosis, cryptococcosis, and demodicosis (Demodex foreign body)?
    Focal coalescing granulomatous lymphadenitis
  22. What type of lymphadenitis is usually caused by histoplasmosis (Histoplasma capsulatum) and Leishmaniasis?
    Diffuse granulomatous lymphadenitis
  23. What is the most common neoplasm of lymph nodes?
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Path E1/3
2012-02-12 14:43:52
Path E1

Path E1/3
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