MRI findings of acromioclavicular joint osteoarthritis are the norm after age 40

Isolated acromioclavicular osteoarthritis and steroid injection

“…However, some authors believe that image results have a poor correlation with clinical symptoms. Rajagopalan et al [ 8 ] claimed that MRI characteristics in ACJOA are so prevalent that they can be considered a universal aspect of human aging, but imaging cannot be used as a reference standard to assess the reliability and accuracy of various symptoms and signs for diagnosis of symptomatic ACJOA.…”