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Macrophagic Myofascitis - Causes, Symptoms, Diagnosis, and Treatment

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Macrophagic myofascitis (MMF) is a rare inflammatory condition that affects skeletal muscles and connective tissue and is characterized by the infiltration of macrophages into muscle tissue.

Medically reviewed by

Dr. Sugreev Singh

Published At February 22, 2023
Reviewed AtFebruary 2, 2024

Introduction:

Macrophagic Myofasciitis (MMF) is an uncommon muscle condition defined by macrophages in muscle tissue. These white blood cells, known as macrophages, are in charge of eliminating infections and debris from the body. The macrophages in MMF assault healthy muscle tissue after becoming aberrantly activated. Inflammation, weakened muscles, and, ultimately, muscular atrophy may result. MMF was discovered in the 1990s, making it a relatively recent syndrome. It is believed that infections or exposure to specific poisons is what causes it.

What Is Macrophagic Myofasciitis?

Small aluminum deposits distinguish Macrophagic Myofasciitis in the tissues of muscles. It is unknown what causes Macrophagic myofasciitis. Nonetheless, a connection between the illness and earlier vaccinations has been proposed. Nonetheless, although Macrophagic myofasciitis can impact the central nervous system, there are no particular indications or symptoms linked to it. Differential Macrophagic myofasciitis diagnoses include other inflammatory conditions such as polymyositis and dermatomyositis. The other names for this illness include the following:

  • Macrophagic myofasciitis.

  • MMF.

  • Macrophagic myofasciitis, childhood.

What Is the Cause of Macrophagic Myofasciitis?

Although the exact etiology of MMF is unknown, immunological responses to infections or foreign material exposure are thought to be the primary causes. The presence of macrophages, immune cells that consume and eliminate foreign material in the muscles, indicates macrophagic myofasciitis. MMF does not currently have a particular treatment. However, immunosuppressive medications and painkillers can be used to mitigate symptoms.

Macrophagic myofasciitis is an uncommon autoimmune disease that causes weakness, muscle soreness, cramping, tenderness at the infection site, and stiffness in the joints or muscles surrounding the injections. However, an association between the disease and earlier immunizations has been proposed. Some parents have reported experiencing symptoms similar to those mentioned above following multiple immunizations over an extended period.

Although there are no known cases of this illness being directly linked to a specific vaccine formulation, some experts feel it could be linked to common underlying causes, such as a single-dose hepatitis B vaccination administered before adolescence.

What Are the Symptoms of Macrophagic Myofasciitis?

Macrophagic myofasciitis is an inflammatory disorder that causes symptoms similar to those of other autoimmune diseases, such as lupus erythematosus or rheumatoid arthritis, including chronic fatigue, joint pain, and muscle pain. This disease occurs when the immune system mistakenly attacks healthy muscle tissue. The autoimmune response can destroy muscles, which causes inflammation in the body. Any section of the nervous system (brain or spinal cord) or any part of the musculoskeletal system (bone) is affected by inflammation. The symptoms of macrophagic myofasciitis typically include:

  • Muscle weakness.

  • Skin lesions (papules) on the face.

  • Neck.

  • Arms.

  • Numbness in hands or feet.

Aluminum is a metal used in vaccines, antiperspirants, and cosmetics. It is also identified in some types of cookware and cooking utensils. Aluminum has been linked to many diseases, including:

  • Parkinson's disease (degeneration of a brain region leading to tremors).

  • Slowness of movement.

  • Balance issues and other symptoms).

  • Multiple sclerosis (a persistent illness that affects the brain and spinal cord).

The symptoms of macrophagic myofasciitis may gradually develop over time; the condition may progress and cause irreversible harm to the muscles, nerves, and other bodily components. Due to muscle weakness, this might make it difficult to move or breathe regularly. It can also make it difficult to swallow food or drinks. Any unexpected or inexplicable condition that raises questions about physical health requires seeing a physician.

What Is the Diagnosis of Macrophagic Myofasciitis?

No standard diagnostic test exists for Macrophagic myofasciitis. Muscle biopsies may yield distinctive results that lead to a diagnosis. To aid in the diagnosis, biopsy samples from the afflicted muscles are analyzed histologically and by immunohistochemistry. Since the symptoms of Macrophagic myofasciitis might be confused with those of other illnesses, including fibromyalgia and chronic fatigue syndrome, diagnosis can be challenging. Specific immunological markers in the biopsies are necessary for a conclusive diagnosis of macrophagic myofasciitis.

What Are the Risk Factors for Macrophagic Myofasciitis?

Several risk factors have been associated with the development of macrophagic myofasciitis, including.

  • Age: This disorder is most commonly seen in young adults between 20 and 40.

  • Sex: Macrophagic myofasciitis is more common in women than in men.

  • Race: Caucasians are more likely to develop this disorder than people of other racial groups.

  • Exposure to Certain Toxins: People exposed to certain toxins may be at increased risk for developing macrophagic myofasciitis.

  • Certain Medical Conditions: People with certain medical conditions, such as lupus or rheumatoid arthritis (a type of arthritis that is inflammatory and results in joint damage, discomfort, and swelling), may be at increased risk for developing macrophagic myofasciitis.

What Is the Treatment for Macrophagic Myofasciitis?

  • The treatment for macrophagic myofasciitis depends on the cause. There is no treatment for macrophagic myofasciitis. However, low corticosteroids may help reduce symptoms affecting muscles and joints. The disease is not contagious (it does not spread from one person to another) and can be treated with steroids or immunosuppressants.

  • Chemotherapy is also an option if one has cancer. Chemotherapy is the process of killing cancer cells with drugs. This kind of therapy for cancer functions by preventing the growth, division, and proliferation of cancer cells.

  • Medication to reduce discomfort and physical therapy to enhance muscular strength and mobility are possible forms of treatment.

  • Surgery may be advised in some circumstances to remove the impacted tissues.

Conclusion:

In recent years, the number of newly diagnosed cases of MMF has been few. The diagnosis of MMF is challenging, and the diagnosis is often misdiagnosed and under-reported. Although it is rare, it is important to see a doctor if individuals think they may have this condition. The risk of complications can be decreased by diagnosing the disease early and getting treatment. The disease is under-recognized in clinical practice because of the lack of diagnostic tests and treatment guidelines. To improve awareness of the disease, diagnosis, and treatment, it is necessary to conduct more research into its epidemiology, clinical features, and treatment.

Dr. Sugreev Singh
Dr. Sugreev Singh

Internal Medicine

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