What blood tests check muscles?
A creatine kinase (CK) test may be used to detect inflammation of muscles (myositis) or muscle damage due to muscle disorders (myopathies) such as muscular dystrophy or to help diagnose rhabdomyolysis if a person has signs and symptoms.
What are the symptoms of high CK levels?
Elevated creatine kinase may accompany symptoms that are related to other body systems including:
- Confusion or loss of consciousness, even for a brief moment.
- Garbled or slurred speech.
- Loss of vision or vision changes.
- Muscle aches and pains.
- Muscle stiffness.
- Sudden weakness or numbness on one side of the body.
What are normal CK levels in blood?
In a healthy adult, the serum CK level varies with a number of factors (gender, race and activity), but normal range is 22 to 198 U/L (units per liter). Higher amounts of serum CK can indicate muscle damage due to chronic disease or acute muscle injury.
How is myositis diagnosed?
Muscle and skin biopsy are often the most definitive way to diagnose myositis diseases. Small samples of muscle tissue show abnormalities in muscles, including inflammation, damage, and abnormal proteins. For those with skin symptoms, doctors often biopsy a bit of skin to examine for characteristic abnormalities.
What diseases cause muscle inflammation?
The four main types of chronic, or long-term, inflammatory myopathies are:
- inclusion body myositis.
- necrotizing autoimmune myopathy.
What can cause elevated CK?
The muscle cells in your body need CK to function. Levels of CK can rise after a heart attack, skeletal muscle injury, or strenuous exercise. They can also go up after drinking too much alcohol or from taking certain medicines or supplements.
Can blood test detect myositis?
Myositis autoantibodies are an important diagnostic and predictive tool. They are identified through a special blood test that tests for a whole panel of autoantibodies that are related to myositis diseases.
What autoimmune disease causes myositis?
There are four types of autoimmune myositis:
- Necrotizing immune-mediated myopathies.
- Inclusion body myositis.