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Elevation of [[creatine kinase]] ([[CK]]) in blood is indicative of myositis. The MM and not the MB or BB fraction of the CK will be elevated.
Elevation of [[creatine kinase]] ([[CK]]) in blood is indicative of myositis. The MM and not the MB or BB fraction of the CK will be elevated.


==Types==
==Differential diagnosis of myositis==
Types of myositis include:
[[Cellulitis]]
* [[Myositis ossificans]]
[[Deep vein thrombosis]]
* [[Idiopathic]] [[inflammatory]] myopathies
[[Dermatomyositis]]
* [[Dermatomyositis]]
[[Hematoma]]
* [[Juvenile dermatomyositis]]
[[Idiopathic]] [[inflammatory]] myopathies
* [[Polymyositis]]
[[Inclusion body myositis]]
* [[Inclusion body myositis]]
[[Influenza]] myositis
* [[Pyomyositis]]
[[Juvenile dermatomyositis]]
[[Lyme]] myositis
[[Myositis ossificans]]
Neuromuscular complications accompanying [[AIDS]]
[[Osteoarthritis]]
[[Osteomyelitis]]
[[Paraneoplastic]] neuropathy
[[Peripheral vascular disease]]
[[Polymyositis]]
[[Pyomyositis]]
[[Rheumatoid arthritis]]
[[Systemic lupus erythematosus]]
[[Toxoplasma]] myositis
[[Trichinosis]]
[[Trypanosomiasis]]
[[Tuberculous pyomyositis]]
Viral myositis (including following an episode of influenza)
[[Wasting syndrome]]


==Diagnostic Findings==
==Diagnostic Findings==

Revision as of 19:24, 5 January 2010

Myositis
ICD-9 M60
OMIM 160750
DiseasesDB 29473
MedlinePlus 001245

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Overview

Myositis is a general term for inflammation of the muscles. Many such conditions are considered likely to be caused by autoimmune conditions, rather than directly due to infection (although autoimmune conditions can be activated or exacerbated by infections.)

Elevation of creatine kinase (CK) in blood is indicative of myositis. The MM and not the MB or BB fraction of the CK will be elevated.

Differential diagnosis of myositis

Cellulitis Deep vein thrombosis Dermatomyositis Hematoma Idiopathic inflammatory myopathies Inclusion body myositis Influenza myositis Juvenile dermatomyositis Lyme myositis Myositis ossificans Neuromuscular complications accompanying AIDS Osteoarthritis Osteomyelitis Paraneoplastic neuropathy Peripheral vascular disease Polymyositis Pyomyositis Rheumatoid arthritis Systemic lupus erythematosus Toxoplasma myositis Trichinosis Trypanosomiasis Tuberculous pyomyositis Viral myositis (including following an episode of influenza) Wasting syndrome

Diagnostic Findings

MRI

(Images courtesy of RadsWiki)

See also

External links

Template:SIB Template:Diseases of the musculoskeletal system and connective tissue de:Myositis sq:Myositis

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