What is inclusion body myositis?

Inclusion Body Myositis (IBM) is a rare, progressive muscle disease characterized by chronic muscle inflammation and weakness. It is the most common acquired muscle disease in adults over 50, affecting approximately 20,000 people in the United States.

Sporadic IBM (sIBM), the most common form, is NOT inherited — it occurs randomly. However, about 67% of patients carry a specific HLA gene combination that makes them genetically susceptible. Hereditary Inclusion Body Myopathies (hIBM) are a separate group of genetic muscle diseases.

Is there a cure for IBM?

As of 2026, there are no FDA-approved treatments specifically for IBM. The disease is notoriously resistant to corticosteroids and immunosuppressive drugs. Physical therapy and adaptive strategies are the mainstay of management. Active research is underway with promising clinical trials.

Does IBM qualify for disability benefits?

Yes. IBM is listed under Section 11.15 (Disorders of the Peripheral Nervous System) in the SSA Blue Book for Social Security Disability Insurance (SSDI). The IBM Functional Rating Scale can support your application.

What exercises are safe with IBM?

Walking, aquatic therapy, light resistance training, balance training, and hand/finger exercises are all recommended for IBM patients. Start slowly, build over 6-12 weeks, and consult with a physical therapist who understands myositis.

Why is IBM often misdiagnosed?

IBM is frequently misdiagnosed as polymyositis, normal aging, fibromyalgia, ALS, or sarcopenia. The average diagnostic delay is 5-10 years from symptom onset because IBM shares symptoms with more common conditions.

Just Diagnosed with IBM — IBM Awareness

Breathe. You have time.IBM is a slow-progressing disease. You don't need to figure everything out today. This guide walks you through the most important steps, one at a time. Bookmark this page and come back to it as you work through each step.

Your First 30 Days — Step by Step

A new diagnosis can feel overwhelming. Here are the six most important things to do, in order of priority.

Get the Right Diagnosis

If you suspect IBM or have been told you have polymyositis but treatment isn't working, ask for:

Muscle biopsy — the gold standard for IBM diagnosis
Anti-NT5C1A blood test — a key biomarker for IBM
EMG (electromyography) — to assess muscle function
CK blood test — may be elevated but often only mildly

Learn about IBM types →

Find a Specialist

General neurologists may not have experience with IBM. Seek out:

Neuromuscular disease specialist or neurologist
Rheumatologist experienced with inflammatory myopathies
Speech-language pathologist for swallowing evaluation
Use TMA's Find a Doctor tool at myositis.org

Find resources and specialists →

Understand Your Stage

IBM progresses slowly. Knowing where you are helps you plan:

Early stage: Focus on exercise, fall prevention, and building your medical team
Middle stage: Adaptive equipment, home modifications, and swallowing assessment
Advanced stage: Respiratory monitoring, caregiver support, and equipment planning

Learn about disease stages →

Start an Exercise Program

Exercise is the only current treatment recommendation for IBM. It's safe and important:

Walking at your own pace — the easiest way to stay active
Aquatic therapy — water supports your weight
Light resistance training — maintain what you have
Balance training — critical for fall prevention

Early stage exercise tips →

Build Your Support Network

You are not alone. Connect with others who understand:

The Myositis Association — support groups, conferences, resources
TMA Community Forum — online discussion with other IBM patients
Facebook groups — search "Inclusion Body Myositis"
Consider counseling — a therapist experienced with chronic illness

Find support groups →

Plan for the Future

IBM is progressive. Early planning makes the journey easier:

Discuss disability benefits with a social worker (IBM qualifies for SSDI)
Review your insurance coverage for DME (durable medical equipment)
Consider advance care planning and healthcare proxy
Explore clinical trials at ClinicalTrials.gov

General planning tips →

What NOT to Do

Don't panic about wheelchair use — Most patients walk for years with assistance before needing a wheelchair full-time
Don't stop moving — Exercise is safe and important. Muscles lose strength within 24-48 hours of inactivity
Don't accept "it's just aging" — If your doctor dismisses your symptoms, seek a second opinion at a neuromuscular center
Don't isolate yourself — Connect with the IBM community early. Other patients understand what you're going through
Don't wait to plan for disability benefits — The application process takes 3-6 months. Start early

Essential Resources

The Myositis Association (TMA) — Primary resource for IBM patients
NINDS — IBM Information — Government health information
ClinicalTrials.gov — Search for IBM clinical trials
Muscular Dystrophy Association — Care centers and research