Understanding Incidental Shoulder MRI Findings

Infographic: You May Have a Rotator Cuff Tear or Shoulder Abnormality without Pain

Most People Over 40 Have “Rotator Cuff Tears” on MRI Even Without Pain

What a new JAMA Internal Medicine study means for shoulder pain diagnosis

Shoulder pain is one of the most common musculoskeletal complaints in adults. Many patients are told they have a “rotator cuff tear” after an MRI. But how often do these imaging findings actually explain pain?

A large 2026 population-based study published in JAMA Internal Medicine provides one of the clearest answers we’ve seen so far and the results are striking.

Key Points

• 99% of adults aged 41–76 had at least one rotator cuff abnormality on MRI

• 96% of asymptomatic shoulders showed abnormalities

• Even full-thickness tears were common in people without pain

• After adjusting for clinical exam findings and other joint changes, full-thickness tears were not significantly associated with symptoms

• Rotator cuff “abnormalities” appear to be largely age-related structural changes rather than reliable pain generators

Study Overview

This was the Finnish Imaging of Shoulder (FIMAGE) study, a nationally representative cross-sectional study conducted between 2023–2024 in Finland.

Participants

• 602 adults

• Ages 41–76

• Bilateral 3-Tesla MRI of both shoulders

• Standardized clinical examination

• Structured symptom assessment

Importantly, participants were recruited regardless of whether they had shoulder pain.

Only 18% reported current shoulder symptoms at the time of evaluation.

What Did the MRIs Show?

The findings were almost universal.

Overall Prevalence (Per Person)

MRI Finding	Prevalence
Normal Tendon	1.3%
Tendinopathy	25%
Partial-Thickness Tear	62%
Full-Thickness Tear	11%

That means 98.7% of participants had some form of rotator cuff abnormality.

Let that sink in.

Nearly everyone over 40 had structural changes.

Age Matters

The severity of findings increased with age:

• No full-thickness tears under age 45

• 4% prevalence at ages 45–49

• 28–29% prevalence in those over 70

Partial-thickness tears became the dominant finding after age 55.

These changes appear to follow a degenerative pattern rather than an acute injury model.

Figure from Ibounig et al., JAMA Internal Medicine, 2026. Licensed under CC-BY 4.0. DOI: 10.1001/jamainternmed.2025.7903.

The Most Important Question:

Do These MRI Findings Correlate With Pain?

This is where the study becomes clinically powerful.

Rotator Cuff Abnormalities by Shoulder (1,204 shoulders total):

Finding	Asymptomatic Shoulders	Symptomatic Shoulders
Any Abnormality	96%	98%
Partial Tear	~51%	~53%
Full-Thickness Tear	6.5%	14.6%

At first glance, full-thickness tears seemed more common in symptomatic shoulders.

But after adjusting for:

• Age

• Sex

• Education

• Other MRI abnormalities (AC joint, GH joint, biceps)

• Clinical exam findings

The difference disappeared.

The adjusted difference in full-thickness tear prevalence was:
0.8% (95% CI −3.4% to 6.0%).

In other words, once you account for other variables, full-thickness tears were not meaningfully associated with symptoms.

Even more striking:

Of the 96 full-thickness tears identified, 78% were in asymptomatic shoulders.

Why This Matters Clinically

This study challenges a deeply ingrained assumption:

“If the MRI shows a tear, that must be the cause of pain.”

But when nearly everyone over 50 has structural abnormalities, the positive predictive value of MRI findings drops dramatically.

The authors highlight an important diagnostic principle:

When the pretest probability of structural changes approaches 100%, the presence of those findings tells you very little about causality.

In simpler terms:

If almost everyone has it, it’s probably not the problem.

A Shift in Language: Are These Really “Tears”?

The authors suggest reconsidering terminology.

Words like:

• Tear

• Rupture

• Damage

Carry emotional weight.

They imply something is broken and must be repaired.

But these findings may represent:

• Age-related tendon remodeling

• Degenerative fraying

• Structural adaptation over time

This is similar to:

• Meniscal “tears” in the knee

• Disc “degeneration” in the spine

Both are extremely common in people without pain.

Plain-English Summary: What This Rotator Cuff MRI Study Really Means
Big takeaway	After age 40, “rotator cuff abnormalities” on MRI are extremely common, even in people with zero shoulder pain.
What the study looked at	602 adults (ages 41–76) in Finland got MRIs of both shoulders plus a standardized shoulder exam.
How common were findings?	99% of people had at least one rotator cuff finding on MRI (tendinopathy or tears).
If your shoulder feels fine	Even pain-free shoulders usually showed findings: about 96% of shoulders without symptoms still had abnormalities on MRI.
If your shoulder hurts	Painful shoulders also usually showed findings: about 98% had abnormalities. In other words, MRIs looked “abnormal” whether people had pain or not.
What about full-thickness tears?	They were more common in painful shoulders at first. But after adjusting for age, other MRI findings, and clinical tests, the difference was small and not clearly linked to symptoms.
What this means for your MRI	A rotator cuff “tear” on MRI doesn’t automatically explain your pain. Many findings may be age-related changes rather than the main problem.
When an MRI is more useful	After a clear injury/trauma, sudden loss of strength, major functional limitation, or when surgery is being considered.
What to focus on instead	Symptoms, strength, range of motion, and how the shoulder tolerates movement and loading — not just what a scan shows.
Bottom line	Imaging ≠ injury. For many people, shoulder pain improves with a rehab-focused plan even if MRI findings don’t “go away.”

Implications for Imaging in Non-Traumatic Shoulder Pain

The study calls into question the routine use of MRI for non-traumatic shoulder pain.

MRI may still be appropriate when there is:

• Acute trauma

• Significant weakness

• Progressive loss of function

• Suspected surgical pathology

But for gradual, atraumatic shoulder pain, imaging findings alone appear insufficient to guide care.

What Does This Mean for Treatment?

This research reinforces a few important clinical principles:

1. Structural change ≠ pain

Pain is multifactorial and influenced by:

• Local tissue sensitivity

• Nervous system modulation

• Movement patterns

• Inflammation

• Psychosocial context

2. Clinical examination matters more than imaging

History and functional testing remain critical.

3. Conservative care should often be first-line

• Targeted strengthening

• Neuromuscular retraining

• Load management

• Manual therapy

• Needling-based interventions like acupuncture and dry needling

Surgery decisions should not rely on imaging alone.

How This Relates to Acupuncture and Dry Needling

When patients are told:

“You have a tear.”

Fear increases.
Movement decreases.
Guarding increases.
Pain often persists.

But if many of these findings represent normal age-related tendon changes, then treatment can focus on:

• Modulating nociceptive input

• Improving motor control

• Reducing myofascial tension

• Supporting graded loading

Acupuncture and dry needling (the use of a solid filiform acupuncture needle to interact with tissue and the nervous system) may help reduce local sensitivity and support neuromuscular adaptation within a comprehensive rehab plan.

This study reinforces that pain should be treated as a functional condition — not just a structural diagnosis.

Limitations of the Study

The authors note:

• Population sample may not reflect severe specialty-care patients

• Few very large tears in the cohort

• Age range limited to 41–76

• Conducted in Finland (limited ethnic diversity)

But the methodology was strong:

• Blinded radiologists

• High interobserver reliability

• Bilateral imaging

• Adjustment for confounders

This is currently one of the highest-quality prevalence studies on rotator cuff abnormalities.

Final Takeaway

Nearly every adult over 40 has rotator cuff abnormalities on MRI.

Most do not have pain.

Even full-thickness tears are often incidental.

This study strongly suggests that many rotator cuff findings represent age-related structural changes rather than definitive pain generators.

For clinicians and patients alike, the question should shift from:

“What does the MRI show?”

to:

“Does this finding actually explain the symptoms?”

That distinction can prevent unnecessary fear, overtreatment, and surgery.

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Frequently Asked Questions (FAQ)

Can you have a rotator cuff tear and not know it?

Yes.

This study found that 96% of pain-free shoulders had rotator cuff abnormalities, including partial and full-thickness tears.

In fact, most full-thickness tears in the study were found in people without shoulder pain.

Many rotator cuff changes appear to be age-related structural changes rather than active injuries.

Does a rotator cuff tear always cause pain?

No.

The study showed very poor correlation between MRI findings and symptoms. After adjusting for other factors, even full-thickness tears were not clearly associated with shoulder pain.

Pain is influenced by many factors beyond structure, including:

• Local inflammation

• Nervous system sensitivity

• Movement mechanics

• Strength and load tolerance

If my MRI shows a rotator cuff tear, do I need surgery?

Not necessarily.

Many people improve with:

• Progressive strengthening

• Mobility work

• Load management

• Physical therapy

• Needling-based treatments when appropriate

Surgery may be appropriate in cases involving:

• Acute traumatic tears

• Significant strength loss

• Functional impairment

• Failed conservative treatment

But imaging alone does not automatically mean surgery is required.

Do partial rotator cuff tears heal without surgery?

Partial-thickness tears often respond well to conservative care.

The body may not “heal” the tear in the sense of reversing it on imaging, but symptoms frequently improve through:

• Tendon loading

• Neuromuscular retraining

• Reducing tissue irritability

Many structural changes remain visible on MRI even after symptoms resolve.

What is the difference between a partial and full-thickness rotator cuff tear?

A partial-thickness tear means part of the tendon is disrupted but not completely detached.

A full-thickness tear means the tendon is disrupted through its full depth.

However, this study showed that both types were common in people without pain.

Severity on imaging does not automatically predict symptom severity.

Should I get an MRI for shoulder pain?

It depends.

An MRI may be appropriate if you have:

• A recent traumatic injury

• Sudden loss of strength

• Significant functional limitation

• Surgical planning needs

For gradual, non-traumatic shoulder pain, early imaging may not change management and may lead to unnecessary worry.

Clinical evaluation and functional testing often provide more useful information initially.

Why do so many people have rotator cuff tears after age 40?

Rotator cuff tendons undergo age-related structural remodeling over time.

The study found:

• 62% had partial-thickness tears

• 11% had full-thickness tears

• Prevalence increased steadily with age.

These changes appear to be part of normal aging rather than always representing acute injury.

Can I lift weights with a rotator cuff tear?

Often, yes — with appropriate programming.

Strength training is frequently part of rehabilitation for rotator cuff-related shoulder pain.

The key is:

• Gradual loading

• Proper mechanics

• Symptom monitoring

• Avoiding sudden overload

Many individuals continue athletic activity successfully despite imaging-confirmed tears.

Is my shoulder “damaged” if I have a tear on MRI?

Not necessarily.

Language like “tear” can imply something is broken.

But when nearly everyone over 50 has some degree of structural change, these findings may represent age-related adaptations rather than catastrophic damage.

The more important question is whether the finding explains your symptoms.

Why do doctors still order MRIs for shoulder pain?

Imaging is widely available and often expected by patients.

However, high-quality population data like this suggests that MRI findings must be interpreted carefully, especially in atraumatic shoulder pain

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Sources:

• Ibounig T, Järvinen TLN, Raatikainen S, Härkänen T, Sillanpää N, Bensch F, Haapamäki V, Toivonen P, Björkenheim R, Ryösä A, Kanto K, Lepola V, Joukainen A, Paavola M, Koskinen S, Rämö L, Buchbinder R, Taimela S. Incidental Rotator Cuff Abnormalities on Magnetic Resonance Imaging. JAMA Intern Med. 2026 Feb 16:e257903. doi: 10.1001/jamainternmed.2025.7903. PMID: 41697693; PMCID: PMC12910452. https://jamanetwork.com/journals/jamainternalmedicine/fullarticle/2844659

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