Rethinking Shoulder Pain: Why MRI Findings Aren’t Always What They Seem

Shoulder pain is a common ailment, and Magnetic Resonance Imaging (MRI) is frequently used in diagnosis. Yet, a growing body of evidence suggests that MRI findings related to rotator cuff abnormalities are often overinterpreted, leading to unnecessary anxiety and potentially overtreatment. New research emphasizes the importance of correlating imaging results with a patient’s functional limitations and clinical examination, rather than relying solely on what an MRI reveals.

The Prevalence of Rotator Cuff Abnormalities

A recent study highlighted a surprisingly high prevalence of rotator cuff (RC) abnormalities in both symptomatic and asymptomatic shoulders. Of 1,204 shoulders examined, 1,076 (90%) were asymptomatic, yet 96% of those shoulders showed RC abnormalities. Conversely, of the 128 symptomatic shoulders, 98% also displayed abnormalities. [1] This suggests that abnormalities detected on MRI are common, even in individuals experiencing no pain.

Beyond Tears: A Matter of Terminology

The study found that the prevalence of tendinopathy and partial-thickness tears was similar between those with and without symptoms. While full-thickness tears initially appeared more common in symptomatic groups, this difference disappeared when researchers accounted for other abnormalities identified on the MRIs. [1]

Researchers argue for a shift in language used to describe these findings. Terms like “tear” can be alarming and imply a need for intervention, when in many cases, the abnormalities represent normal age-related changes rather than clinically significant structural issues. They propose using more precise and less value-laden terminology such as “lesion,” “defect,” “fraying,” “disruption,” “structural alteration,” or “degeneration.” [1]

The Role of MRI in Shoulder Pain Diagnosis

Experts agree that the interpretation of MRI findings requires careful consideration. An accompanying editorial in the same publication supports the call for a language shift and cautions clinicians to contextualize MRI results. [1]

For shoulder pain not related to a specific injury, a “watch-and-wait” approach with rest or physical therapy for a couple of months is often recommended before resorting to an MRI. [1] If symptoms persist after this initial period, an MRI may be warranted, but treatment decisions should be guided by the patient’s history, clinical examination, and functional limitations—not solely by the imaging results.

Understanding Rotator Cuff Tears

The rotator cuff is a group of muscles and tendons surrounding the shoulder joint, providing stability and enabling movement. [2] Rotator cuff injuries range from mild tendon irritation to partial or full-thickness tears. Partial-thickness tears are incomplete tears of the rotator cuff, and can be traumatic (caused by injury) or develop over time, particularly in individuals over 50. [4]

Treatment Options for Partial-Thickness Tears

Treatment for partial-thickness tears depends on the extent of the tear. Tears involving less than 50% of the tendon thickness are often treated with a ‘debridement’ – a keyhole surgery to tidy up and smooth the tear to stimulate healing. [4] Tears larger than 50% of the tendon thickness typically require re-attachment of the tendon to the bone, known as a rotator cuff repair, which can also be performed via keyhole or open surgery. [4]

Key Takeaways

• MRI findings of rotator cuff abnormalities are common, even in people without shoulder pain.
• The language used to describe these findings can significantly impact patient anxiety and treatment decisions.
• Treatment should be guided by a patient’s symptoms and functional limitations, not solely by MRI results.
• A conservative approach with rest and physical therapy is often appropriate before considering an MRI.