Calcific bursitis of the shoulder
Inflammation of the bursa can lead to calcium deposition most commonly seen within the sub-acromial bursa of the shoulder.
Calcifying bursitis. (a) The image shows hyperechoic material within the subacromial subdeltoid bursa compatible with calcific deposits, most commonly calcium hydroxyapatite crystal, distension of the bursa (small arrows) by the extensive bursal calcification (b) Wide posterior acoustic shadow in calcific bursitis. The finding was correlated with shoulder radiography (not shown).