Difference between revisions of "Muscles Inflammatory - Pathology"

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==Myositis==
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#redirect[[:Category:Muscles - Inflammatory Pathology]]
 
 
 
 
[[Bacterial Myositis]]
 
 
 
 
 
 
 
===[[Viral Myositis]]===
 
 
 
 
 
 
 
===[[Parasitic Myositis]]===
 
 
 
 
 
 
 
 
 
 
 
===[[Immune-Mediated Myositis]]===
 
 
 
 
 
===Idiopathic myositis===
 
 
 
====Canine polymyositis====
 
 
 
*DOES NOT include [[Masticatory Muscle Myositis]]
 
*Rare
 
*Clinical signs:
 
**Muscle pain
 
**Fever
 
**Weakness, particularly in hind limbs
 
*Grossly:
 
**Inflammation is accompanied by muscle necrosis and regeneration
 
*Histologically:
 
**Inflammatory foci with lymphocytes, plasma cells and occasionally eosinophils
 
*Possibly immunological cause
 
*Single biopsy may not be enough to make the diagnosis as it tends to be multifocal and disseminated
 
*Lesions similar to some infectious causes (such as ''[[Toxoplasma gondii]]'')
 
 
 
 
 
[[Category:Muscles - Inflammatory Pathology]]
 
 
 
 
 
====Canine bilateral extraocular polymyositis====
 
 
 
*In Golden retrievers
 
*Very rare
 
*Clinical signs:
 
**Acute bilateral exophthalmos
 
*Involves only extraocular muscles except for retractor blbi
 
*Grossly:
 
**Swollen and pale extraocular muscles
 
*Histologically:
 
**Sterile myositis
 
**Multifocal necrosis of myofibres
 
**Lymphocytic, histiocytic and plasmacytic infiltrate with few [[Neutrophils|neutrophils]]
 
 
 
 
 
 
 
[[Category:Muscles - Inflammatory Pathology]]
 
 
 
 
 
====Bovine and ovine eosinophilic myositis====
 
 
 
*Unknown aetiology
 
*Major cell involved is eosinphil
 
*Usually noticed at slaughter - green muscle discoloration
 
*May be caused by degenteration of [[Sarcocystis|''Sarcocystis'' spp.]]
 
*Grossly:
 
**Green discolored areas, well demarcated
 
**Mostly in muscles of back and thighs
 
*Histologically:
 
**Massive eosinophil infiltration
 
**Muscle fibres may degenerate
 
**In old lesions - endimysial fibrosis, myofibre atrophy, some regeneration, lymphocytes, plasma cells, macrophages and few eosinophils
 
**Capsule may form
 
 
 
[[Category:Muscles - Inflammatory Pathology]]
 
 
 
 
 
[[Category:Musculoskeletal System - Pathology]]
 

Latest revision as of 23:15, 5 March 2011