Gross pathology hemolymph Flashcards
What causes an enlarged tonsil with hyperplastic change and centrally dilated lymphatics
Lymphangiomatous tonsillar polyp
Tonsils with hemorrhage and necrosis in chickens
Newcastle disease (avian paramyxovirus type 1)
What causes hemorrhage in the thymus?
Bromethalin (rodentacides), trauma, snake venom
What causes thymic atrophy with dark fluid filled cysts in primates?
Viral or steroid induced cystic atrophy
What causes small lymphoid organs w. hemorrhage/necrosis?
Virus (CSF)
Paraneoplastic syndromes with thymoma
Exfoliative dermatitis
Paraneoplastic exophthalmos
Myasthenia gravis
Which lymphoma is FeLV driven?
Thymic lymphoma
Two presentations of lymphoma in ferrets
Young- visceral B cell
Older- large lymph nodes only, T cell
Which mice get thymic lymphoma?
AKR (almost 100%), C57 and C58
What cow breed gets congenital lymphedema?
Escher
What causes congenital lymphedema
Podoplanin deficiency
Cause of tiny, nonexistent LNs
SCID
Cause of lymphoid necrosis in bursa (will be small)
Avian birnavirus (Infectious Bursal Disease); attacks B cells
Cause of large bursa with edema; other gross lesion
Avian circovirus (Chicken Anemia Agent); attacks T cells, so also thymus atrophy
Cause of enlarged LNs in a macaque
early SIV (lentivirus; loves lymphocytes)
Cause of enlarged LNs in a pig
Porcine circovirus type 2
Cause of enlarged LN in a dog
Dimorphic fungi- histoplasma, blastomyces
Coccidioidomycosis
Cause of enlarged LN in cattle
Hairy vetch toxicity (vicia villosa)
What kind of lymphoma is in cat GI?
T cell
What kind of lymphoma is in the dog nose?
B cell
What antigen is expressed on FeLV infected cells?
Feline oncovirus-associated cell membrane antigen (FOCMA)
What type of lymphoma is caused by BLV
B cell