Myositis (peds): Difference between revisions

(Created page with "==Background== viral myositis occurs and Influenza is one of the most common viruses it occurs with. Patients usually have a history of recent illness (fever, URI symptoms, f...")
 
 
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{{Peds top}} [[myositis]]
==Background==
==Background==
viral myositis occurs and Influenza is one of the most common viruses it occurs with.  Patients usually have a history of recent illness (fever, URI symptoms, fever, etc).  Usually, as the patient is starting to improve they will present with significant pain in their muscles.  Most commonly it causes pain in the lower legs but can have pain and tenderness in other muscle groups (thighs, arms).  Patient usually look well but will sometimes walk with wide gait and on their toes.  When lying in bed will often keep toes pointed and when you try to dorsiflex feet will have pain in calves.  Work-up includes ck and urine to check for myoglobin.  Rhabdo is unusual but has been reported.
*[[Influenza]] is one of the most common causes of viral myositis
*[[Rhabdo]] is unusual but has been reported.


==Clinical Features==
==Clinical Features==
 
*Patients usually have a history of recent illness ([[fever (Peds)|fever]], [[URI]] symptoms, etc)
*Significant [[myalgia]]s as starting to improve from constitutional symptoms
**Most commonly lower legs
**Can have pain and tenderness in other muscle groups (thighs, arms)
*Usually look well, but will sometimes walk with wide gait and on their toes
**When lying in bed, will often keep toes pointed with pain in calves upon dorsiflexion


==Differential Diagnosis==
==Differential Diagnosis==
 
{{Myalgia DDX}}
{{Pediatric hip DDX}}


==Evaluation==
==Evaluation==
 
*Total CK
*[[UA]] (for myoglobin)


==Management==
==Management==
 
*Supportive
*Fluids ([[IVF]] or oral)
*[[Analgesia]]; avoid [[NSAIDs]]


==Disposition==
==Disposition==
 
*Discharge with close outpatient follow up if CPK <3,000 and able to orally hydrate <ref>https://pedemmorsels.com/benign-acute-childhood-myositis/</ref>


==See Also==
==See Also==
 
*[[Myositis]]


==External Links==
==External Links==
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==References==
==References==
<references/>
<references/>
[[Category:Rheumatology]] [[Category:Pediatrics]]

Latest revision as of 23:28, 5 November 2025

This page is for pediatric patients. For adult patients, see: myositis

Background

  • Influenza is one of the most common causes of viral myositis
  • Rhabdo is unusual but has been reported.

Clinical Features

  • Patients usually have a history of recent illness (fever, URI symptoms, etc)
  • Significant myalgias as starting to improve from constitutional symptoms
    • Most commonly lower legs
    • Can have pain and tenderness in other muscle groups (thighs, arms)
  • Usually look well, but will sometimes walk with wide gait and on their toes
    • When lying in bed, will often keep toes pointed with pain in calves upon dorsiflexion

Differential Diagnosis

Myalgia

Pediatric limp

Hip Related

Other Causes of Limping

Evaluation

  • Total CK
  • UA (for myoglobin)

Management

Disposition

  • Discharge with close outpatient follow up if CPK <3,000 and able to orally hydrate [1]

See Also

External Links

References

  1. ↑ https://pedemmorsels.com/benign-acute-childhood-myositis/
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