It is important to have an accurate differential diagnosis to rule out other pathologies such as rotator cuff tear, bicipital tendinitis, subacromial and subdeltoid bursitis
and thoracic outlet syndrome.
Additionally, patients with PMR were more likely to have abnormal ultrasound findings in their shoulders (especially subdeltoid bursitis
and biceps tenosynovitis), and hips (synovitis and/or trochanteric bursitis).
MRI appearances of multiple rice body formation in chronic subacromial and subdeltoid bursitis
, in association with synovial chondromatosis.
Comparative efficacy and safety of the non-steroidal anti-inflammatory drugs nimesulide and diclofenac in patients with acute subdeltoid bursitis
and bicipital tendinitis.
Sensitivity and specificity values for subacromial, subdeltoid bursitis
was 25% and 86.36%, PPV of 70%, NPV of 47.5%, accuracy of 52%, p value of spearman correlation 0.119, nonsignificant and Kappa coefficient was 0.104 suggesting a slight association.
One patient had subacromial subdeltoid bursitis
in both ultrasound and MRI without any rotator cuff pathology.