Unit 3- Hematopoietic System

Question 1

Lymphatic Circulation

Answer 1

Subcapsular sinuses, trabecular sinuses, medullary sinuses, efferent lymphatics, thoracic duct

Question 2

Small Lymph Node Reaction Patterns

Answer 2

Lymphoid atrophy, lymph node degeneration, lymph node hypoplasia

Question 3

Enlarged Lymph Node Reaction Patterns

Answer 3

Lymphoid hyperplasia and drainage, lymphadenitis, metastatic neoplasia, primary neoplasia

Question 4

Lymphoid Hyperplasia

Answer 4

Response to antigen presentation or interleukins, local or generalized, draining site of local infection

Question 5

Lymph Node Histology Structure

Answer 5

Capsule, germinal center, outer cortex, and inner cortex

Question 6

Suppurative Lymphadenitis

Answer 6

Bacterial infection, Strep, Cornyebacterium, and Trueperella pyogenes

Question 7

Granulomatous Lymphadenitis

Answer 7

Bacterial, viral, or fungal

Question 8

Equine Lymphadenitis

Answer 8

Strangles caused by Strep equi in the retropharyngeal lymph node

Question 9

Onion Skin Lymph Node in Sheep

Answer 9

Caseous lymphadenitis caused by Cornyebacterium pseudotuberculosis

Question 10

Bovine Granulomatous Lymph Node

Answer 10

Mycobacterium bovis in mesenteric lymph node

Question 11

Rhodococcus equi

Answer 11

Respiratory disease and enteric disease in foals causing lymphadenitis

Question 12

Primary Neoplasias of LN

Answer 12

Lymphoma, plasma cell tumor, and histiocytic neoplasm

Question 13

Metastatic Neoplasias of LN

Answer 13

Carcinoma, melanoma, mast cell tumor

Question 14

Oral Melanoma

Answer 14

Aggressive and metastasize to lymph nodes and lungs

Question 15

Hemosiderosis

Answer 15

Brownish discoloration observed in lymph nodes draining areas of hemorrhage

Question 16

Anthracosis

Answer 16

Carbon particles retained by macrophages so medulla appears black

Question 17

White Pulp of Spleen

Answer 17

Lymphoid follicles

Question 18

Red Pulp of Spleen

Answer 18

Hematopoietic center

Question 19

Bloody Spleen

Answer 19

Diffuse splenomegaly with bloody consistency, congestion, septicemia, or acute hemolytic anemia

Question 20

Anthrax

Answer 20

Rapid post mortem autolysis and blood oozing from body orifices, do not perform post mortem

Question 21

Meaty Spleen

Answer 21

Diffuse splenomegaly with firm consistency, neoplasia, septicemia, chronic hemolytic anemia, granulomatous disease, diffuse follicular hyperplasia

Question 22

Tularemia

Answer 22

Francisella tularensis, rabbit fever causes systemic disease in cats, multifocal miliary white foci in spleen, lymph node, and liver

Question 23

Nodular Bloody Spleen

Answer 23

Hematoma, hemangiosarcoma, incomplete contraction, acute infarct, nodular hyperplasia

Question 24

Splenic Hemangiosarcoma

Answer 24

Most common malignant tumor in canine, leads to hemabdomen, poor prognosis, endothelial cells fill with blood

Question 25

Classical Swine Fever

Answer 25

Hog cholera, pestivirus targets macrophage, endothelial, and epithelial cells causing hemorrhage in kidneys, splenic infarct, necrotizing tonsilitis, and ulcers

Question 26

Turkey Egg Kidney

Answer 26

Ecchymosis of kidneys due to hog cholera

Question 27

Nodular Meaty Spleen

Answer 27

Focal nodular hyperplasia, granuloma, abscess, neoplasia

Question 28

Histiocytic Sarcoma

Answer 28

Interstitial dendritic cells in bernese mountain dogs, rottweilers, and retreivers, has local or disseminated form in hematopoietic areas

Question 29

Siderotic Plaques

Answer 29

Incidental lesions of the spleen

Question 30

Splenic Amyloidosis

Answer 30

Orange and waxy spleen

Question 31

Thymus Structure

Answer 31

Epithelial and lymphoid tissue, lobulated and split into cortical and medullary areas

Question 32

Severe Combined Immunodeficiency

Answer 32

Arabian foals lack B and T lymphocytes, develop disease after a few days, atrophy of the thymus

Question 33

Thymic Lymphoma

Answer 33

Neoplasm of T-lymphocytes in younger animals, malignant

Question 34

Thymoma

Answer 34

Neoplasm of epithelial cells, less common, slow growing and encapsulated

Question 35

Tonsil Reaction Patterns

Answer 35

Lymphoid depletion, inflammation, inflammatory polyps, neoplasia

Question 36

Tonsil Lymphoid Depletion

Answer 36

Viral infections like classical swine fever

Question 37

Tonsil Inflammation

Answer 37

Only primary or hematogenous, tonsils lack afferent lymphatics

Question 38

Tonsil Inflammatory Polyps

Answer 38

Common in older dogs

Question 39

Tonsil Neoplasia

Answer 39

Primary only, tonsils lack afferent lymphatics