Relationship between calcifying tendinitis and subacromial impingement: A prospective radiography and magnetic resonance imaging study

Calcific tendonitis of the shoulder: is subacromial decompression in combination with removal of the calcific deposit beneficial?

“…18 Furthermore, only 16% of these patients had a type III acromion. The authors concluded that there was no correlation between ''calcifying tendonitis and osseous subacromial impingement'' and that subacromial decompression was not indicated in the treatment of patients with calcific deposits.…”

Shock-wave therapy is effective for chronic calcifying tendinitis of the shoulder

“…As yet there are no firm views as to the benefit of endoscopic operations, 25 but additional subacromial decompression does not seem to be indicated. 26 Graff 13 was the first to analyse the effects of shock waves on muscles and tendons in dogs. After high-energy treatment he noted intra-and perimuscular haematomas and described the formation of metaplastic chondroid tissue.…”

Myositis ossificans of the subscapularis: An unusual case of restricted internal rotation

“…Calcific deposits are commonly confined to a single tendon, with the supraspinatus having a reported incidence as high as 63%. 5 However, analysis of either plain radiographs or MRIs has verified the presence of multiple calcific deposits affecting more than 1 tendon, with the supraspinatus and subscapularis tendons being jointly affected in 20% of cases. 5 Magnetic resonance imaging can be used to differentiate myositis ossificans from calcific tendonitis easily, because it has a high (bright) signal on the T1-weighted image.…”

“…5 However, analysis of either plain radiographs or MRIs has verified the presence of multiple calcific deposits affecting more than 1 tendon, with the supraspinatus and subscapularis tendons being jointly affected in 20% of cases. 5 Magnetic resonance imaging can be used to differentiate myositis ossificans from calcific tendonitis easily, because it has a high (bright) signal on the T1-weighted image. 9 A calcific deposit would have a low (black) signal throughout the deposit, with no central hyperintensity on T1-or T2-weighted images.…”