Original Investigation

Incidental Rotator Cuff Abnormalities on Magnetic Resonance Imaging

JAMA Internal Medicine 10.1001/jamainternmed.2025.7903

February 16, 2026 at 11:00 AM EST

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What is the prevalence of rotator cuff (RC) abnormalities in the general Finnish population and how do these findings correspond with shoulder symptoms?In this cross-sectional study of 602 Finnish adults aged 41 to 76 years who underwent bilateral 3-Tesla shoulder magnetic resonance imaging and clinical assessment, 99% had at least 1 RC abnormality. RC abnormalities were present in both asymptomatic (96%) and symptomatic (98%) shoulders.The findings of this study suggest that RC abnormalities are nearly universal after age 40 years and that routine imaging should not guide diagnosis or treatment of atraumatic shoulder pain.

Corresponding Author: Thomas Ibounig, MD, Department of Orthopedics and Traumatology, Helsinki University Hospital, PO Box 320, 00029 HUS, Helsinki, Finland (thomas.ibounig@helsinki.fi).

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