Unit 3- Hematopoietic System Flashcards
Lymphatic Circulation
Subcapsular sinuses, trabecular sinuses, medullary sinuses, efferent lymphatics, thoracic duct
Small Lymph Node Reaction Patterns
Lymphoid atrophy, lymph node degeneration, lymph node hypoplasia
Enlarged Lymph Node Reaction Patterns
Lymphoid hyperplasia and drainage, lymphadenitis, metastatic neoplasia, primary neoplasia
Lymphoid Hyperplasia
Response to antigen presentation or interleukins, local or generalized, draining site of local infection
Lymph Node Histology Structure
Capsule, germinal center, outer cortex, and inner cortex
Suppurative Lymphadenitis
Bacterial infection, Strep, Cornyebacterium, and Trueperella pyogenes
Granulomatous Lymphadenitis
Bacterial, viral, or fungal
Equine Lymphadenitis
Strangles caused by Strep equi in the retropharyngeal lymph node
Onion Skin Lymph Node in Sheep
Caseous lymphadenitis caused by Cornyebacterium pseudotuberculosis
Bovine Granulomatous Lymph Node
Mycobacterium bovis in mesenteric lymph node
Rhodococcus equi
Respiratory disease and enteric disease in foals causing lymphadenitis
Primary Neoplasias of LN
Lymphoma, plasma cell tumor, and histiocytic neoplasm
Metastatic Neoplasias of LN
Carcinoma, melanoma, mast cell tumor
Oral Melanoma
Aggressive and metastasize to lymph nodes and lungs
Hemosiderosis
Brownish discoloration observed in lymph nodes draining areas of hemorrhage