This study imaged the dominant shoulder of 100 asymptomatic volunteers aged 19-88 with T2-weighted MRI. It asked how often peritendinous and bone abnormalities appear in people without shoulder complaints. Findings were correlated with age and with MR-evident rotator cuff status, using 20 arthroscopically proven symptomatic scans as blinded controls.
When you read a shoulder MRI, remember that bone and peritendinous changes are common in people with no symptoms, so the report must be interpreted against the clinical picture. AC joint osteoarthrosis is the classic trap. It shows up in 76% of asymptomatic shoulders and mostly reflects age, so do not blame it for a patient's pain without corroborating findings.
Spurs and humeral head cysts are more informative. They track with cuff tendon severity independent of age, which supports the idea that bony impingement changes may precede and drive cuff degeneration.
The secondary signs are the practical payoff. Peribursal fat plane loss and subacromial-subdeltoid bursal fluid are rare in normal tendons but nearly universal with tears, so in an equivocal case they push you toward calling a real cuff tear. Finally, small joint and biceps sheath fluid is normal, but a large isolated biceps sheath effusion is uncommon and may indicate biceps tendon disease.
This study imaged the dominant shoulder of 100 asymptomatic volunteers aged 19-88 with T2-weighted MRI. It asked how often peritendinous and bone abnormalities appear in people without shoulder complaints. Findings were correlated with age and with MR-evident rotator cuff status, using 20 arthroscopically proven symptomatic scans as blinded controls.
When you read a shoulder MRI, remember that bone and peritendinous changes are common in people with no symptoms, so the report must be interpreted against the clinical picture. AC joint osteoarthrosis is the classic trap. It shows up in 76% of asymptomatic shoulders and mostly reflects age, so do not blame it for a patient's pain without corroborating findings.
Spurs and humeral head cysts are more informative. They track with cuff tendon severity independent of age, which supports the idea that bony impingement changes may precede and drive cuff degeneration.
The secondary signs are the practical payoff. Peribursal fat plane loss and subacromial-subdeltoid bursal fluid are rare in normal tendons but nearly universal with tears, so in an equivocal case they push you toward calling a real cuff tear. Finally, small joint and biceps sheath fluid is normal, but a large isolated biceps sheath effusion is uncommon and may indicate biceps tendon disease.