Polymyositis: Difference between revisions
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Polymyositis (PM) is a chronic inflammatory myopathy, which is classified as a persistence inflammatory muscle disease. PM affects striated muscle fibers, but spares smooth muscle throughout the body and can come on gradually over weeks or months. PM targets proximal musculature, with little to no pain, impairing strength and is characterized by an elevation of serum muscle enzymes and a wide variety of skin abnormalities, sometimes including cardiopulmonary impairments. Although no pain is present, some tenderness may occur directly over involved musculature, but all deep tendon reflexes are preserved. The general approach to treating polymyositis is through pharmacological and conservative treatment to increase strength and prevent development of extra-muscular disease in order to better outcomes for the patient. <br> | Polymyositis (PM) is a chronic inflammatory myopathy, which is classified as a persistence inflammatory muscle disease. PM affects striated muscle fibers, but spares smooth muscle throughout the body and can come on gradually over weeks or months. PM targets proximal musculature, with little to no pain, impairing strength and is characterized by an elevation of serum muscle enzymes and a wide variety of skin abnormalities, sometimes including cardiopulmonary impairments. Although no pain is present, some tenderness may occur directly over involved musculature, but all deep tendon reflexes are preserved. The general approach to treating polymyositis is through pharmacological and conservative treatment to increase strength and prevent development of extra-muscular disease in order to better outcomes for the patient. <br> | ||
== Prevalence == | == Prevalence<sup>2</sup> == | ||
Current literature is unclear about the age of presentation – some articles state it mostly affects adults in their 30’s to 50’s, while other sources say the onset is in adults aged 50-70. Although research shows that it is rare to have an onset earlier than 18 years of age, it has been proven that females are more susceptible to PM than males with a ratio of 2:1. One in 100,000 people have PM with blacks more commonly diagnosed than whites. | |||
== Characteristics/Clinical Presentation == | == Characteristics/Clinical Presentation == |
Revision as of 22:52, 17 April 2013
Original Editors - Chris Pyles & Kayla Thiesen from Bellarmine University's Pathophysiology of Complex Patient Problems project.
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Definition/Description1,2[edit | edit source]
Polymyositis (PM) is a chronic inflammatory myopathy, which is classified as a persistence inflammatory muscle disease. PM affects striated muscle fibers, but spares smooth muscle throughout the body and can come on gradually over weeks or months. PM targets proximal musculature, with little to no pain, impairing strength and is characterized by an elevation of serum muscle enzymes and a wide variety of skin abnormalities, sometimes including cardiopulmonary impairments. Although no pain is present, some tenderness may occur directly over involved musculature, but all deep tendon reflexes are preserved. The general approach to treating polymyositis is through pharmacological and conservative treatment to increase strength and prevent development of extra-muscular disease in order to better outcomes for the patient.
Prevalence2[edit | edit source]
Current literature is unclear about the age of presentation – some articles state it mostly affects adults in their 30’s to 50’s, while other sources say the onset is in adults aged 50-70. Although research shows that it is rare to have an onset earlier than 18 years of age, it has been proven that females are more susceptible to PM than males with a ratio of 2:1. One in 100,000 people have PM with blacks more commonly diagnosed than whites.
Characteristics/Clinical Presentation[edit | edit source]
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