Pyomyositis: Difference between revisions
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{{SI}} | |||
{{Infobox medical condition | |||
| name = Pyomyositis | |||
| image = [[File:Pyomyositis_MRI.jpg|left|thumb|MRI showing pyomyositis]] | |||
| caption = MRI showing pyomyositis | |||
| synonyms = Tropical pyomyositis, myositis tropicans | |||
| pronounce = | |||
| specialty = [[Infectious disease]], [[Rheumatology]] | |||
| symptoms = [[Fever]], [[muscle pain]], [[swelling]] | |||
| complications = [[Sepsis]], [[abscess]] formation | |||
| onset = | |||
| duration = | |||
| types = | |||
| causes = [[Bacterial infection]], commonly ''[[Staphylococcus aureus]]'' | |||
| risks = [[Immunodeficiency]], [[trauma]], [[malnutrition]] | |||
| diagnosis = [[MRI]], [[CT scan]], [[ultrasound]], [[blood culture]] | |||
| differential = [[Cellulitis]], [[osteomyelitis]], [[deep vein thrombosis]] | |||
| prevention = | |||
| treatment = [[Antibiotics]], [[surgical drainage]] | |||
| medication = | |||
| prognosis = Generally good with treatment | |||
| frequency = More common in tropical regions | |||
| deaths = Rare with appropriate treatment | |||
}} | |||
Pyomyositis is rare bacterial infection of the skeletal muscle (the muscles used for movement). | Pyomyositis is rare bacterial infection of the skeletal muscle (the muscles used for movement). | ||
[[File:Tropical pyomyositis CT.JPG|left|thumb]] | |||
[[File:Tropical pyomyositis CT.JPG|thumb]] | [[File:X-ray of soft tissue swelling of right thigh.jpg|left|thumb]] | ||
[[File:X-ray of soft tissue swelling of right thigh.jpg|thumb]] | |||
== '''Causes''' == | == '''Causes''' == | ||
Approximately 90% of cases are caused by the bacterium, '''Staphylococcus aureus'''. | Approximately 90% of cases are caused by the bacterium, '''Staphylococcus aureus'''. | ||
== '''Riskfactors''' == | == '''Riskfactors''' == | ||
Risk factors for the condition include strenuous activity, muscle trauma, skin infections, infected insect bites, illicit drug injections, connective tissue disorders, and diabetes. | Risk factors for the condition include strenuous activity, muscle trauma, skin infections, infected insect bites, illicit drug injections, connective tissue disorders, and diabetes. | ||
== '''Signs and symptoms ''' == | == '''Signs and symptoms ''' == | ||
Signs and symptoms may include pain and tenderness of the affected muscle, fever, and [[abscess]] formation. If left untreated, the abscess may extend into the bone and joint or blood poisoning may occur. | Signs and symptoms may include pain and tenderness of the affected muscle, fever, and [[abscess]] formation. If left untreated, the abscess may extend into the bone and joint or blood poisoning may occur. | ||
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* Recurrent cutaneous [[abscess]] formation | * Recurrent cutaneous [[abscess]] formation | ||
* Subcutaneous nodule(Firm lump under the skin) | * Subcutaneous nodule(Firm lump under the skin) | ||
30%-79% of people have these symptoms | 30%-79% of people have these symptoms | ||
* Leukocytosis(Elevated white blood count) | * Leukocytosis(Elevated white blood count) | ||
* Testicular teratoma | * Testicular teratoma | ||
* Weight loss | * Weight loss | ||
5%-29% of people have these symptoms | 5%-29% of people have these symptoms | ||
* Renal insufficiency(Renal failure) | * Renal insufficiency(Renal failure) | ||
* Sepsis(Infection in blood stream) | * Sepsis(Infection in blood stream) | ||
* Sudden cardiac death(Premature sudden cardiac death) | * Sudden cardiac death(Premature sudden cardiac death) | ||
== '''Diagnosis''' == | == '''Diagnosis''' == | ||
* Pus discharge culture and sensitivity | * Pus discharge culture and sensitivity | ||
| Line 36: | Line 53: | ||
* [[MRI]] is useful. | * [[MRI]] is useful. | ||
* [[Ultrasound]] guided aspiration.. | * [[Ultrasound]] guided aspiration.. | ||
== '''Treatment''' == | == '''Treatment''' == | ||
Treatment generally includes surgical drainage of the abscess and [[antibiotics]]. | Treatment generally includes surgical drainage of the abscess and [[antibiotics]]. | ||
== '''Epidemiology''' == | == '''Epidemiology''' == | ||
Pyomyositis is mainly a disease of children and was first described by Scriba in 1885. Most patients are aged 2 to 5 years, but infection may occur in any age group.Infection often follows minor trauma and is more common in the tropics, where it accounts for 4% of all hospital admissions. In temperate countries such as the US, pyomyositis was a rare condition (accounting for 1 in 3000 pediatric admissions), but has become more common since the appearance of the USA300 strain of MRSA. | Pyomyositis is mainly a disease of children and was first described by Scriba in 1885. Most patients are aged 2 to 5 years, but infection may occur in any age group.Infection often follows minor trauma and is more common in the tropics, where it accounts for 4% of all hospital admissions. In temperate countries such as the US, pyomyositis was a rare condition (accounting for 1 in 3000 pediatric admissions), but has become more common since the appearance of the USA300 strain of MRSA. | ||
{{Bacterial diseases}} | {{Bacterial diseases}} | ||
{{Myopathy}} | {{Myopathy}} | ||
[[Category:Bacterial diseases]] | [[Category:Bacterial diseases]] | ||
[[Category:Bacterium-related cutaneous conditions]] | [[Category:Bacterium-related cutaneous conditions]] | ||
Latest revision as of 20:23, 8 April 2025
Editor-In-Chief: Prab R Tumpati, MD
Obesity, Sleep & Internal medicine
Founder, WikiMD Wellnesspedia &
W8MD medical weight loss NYC and sleep center NYC
| Pyomyositis | |
|---|---|
 | |
| Synonyms | Tropical pyomyositis, myositis tropicans |
| Pronounce | |
| Specialty | Infectious disease, Rheumatology |
| Symptoms | Fever, muscle pain, swelling |
| Complications | Sepsis, abscess formation |
| Onset | |
| Duration | |
| Types | |
| Causes | Bacterial infection, commonly Staphylococcus aureus |
| Risks | Immunodeficiency, trauma, malnutrition |
| Diagnosis | MRI, CT scan, ultrasound, blood culture |
| Differential diagnosis | Cellulitis, osteomyelitis, deep vein thrombosis |
| Prevention | |
| Treatment | Antibiotics, surgical drainage |
| Medication | |
| Prognosis | Generally good with treatment |
| Frequency | More common in tropical regions |
| Deaths | Rare with appropriate treatment |
Pyomyositis is rare bacterial infection of the skeletal muscle (the muscles used for movement).
Causes[edit]
Approximately 90% of cases are caused by the bacterium, Staphylococcus aureus.
Riskfactors[edit]
Risk factors for the condition include strenuous activity, muscle trauma, skin infections, infected insect bites, illicit drug injections, connective tissue disorders, and diabetes.
Signs and symptoms [edit]
Signs and symptoms may include pain and tenderness of the affected muscle, fever, and abscess formation. If left untreated, the abscess may extend into the bone and joint or blood poisoning may occur. For most diseases, symptoms will vary from person to person. People with the same disease may not have all the symptoms listed. 80%-99% of people have these symptoms
- Fever
- Myalgia(Muscle ache)
- Myositis(Muscle inflammation)
- Recurrent cutaneous abscess formation
- Subcutaneous nodule(Firm lump under the skin)
30%-79% of people have these symptoms
- Leukocytosis(Elevated white blood count)
- Testicular teratoma
- Weight loss
5%-29% of people have these symptoms
- Renal insufficiency(Renal failure)
- Sepsis(Infection in blood stream)
- Sudden cardiac death(Premature sudden cardiac death)
Diagnosis[edit]
- Pus discharge culture and sensitivity
- X ray of the part to rule out osteomyelitis
- Creatinine phosphokinase (more than 50,000 units)
- MRI is useful.
- Ultrasound guided aspiration..
Treatment[edit]
Treatment generally includes surgical drainage of the abscess and antibiotics.
Epidemiology[edit]
Pyomyositis is mainly a disease of children and was first described by Scriba in 1885. Most patients are aged 2 to 5 years, but infection may occur in any age group.Infection often follows minor trauma and is more common in the tropics, where it accounts for 4% of all hospital admissions. In temperate countries such as the US, pyomyositis was a rare condition (accounting for 1 in 3000 pediatric admissions), but has become more common since the appearance of the USA300 strain of MRSA.
| Proteobacteria-associated Gram-negative bacterial infections (primarily A00–A79, 001–041, 080–109) | ||||||||||||||
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