Acute calcific periarthritis of acromioclavicular joint: A case report.

Deposition of hydroxyapatite crystals in the para-articular soft tissues is a well-known condition, often involving the shoulder joint. However, the deposition of calcium salts in the para-articular soft tissue of acromioclavicular joint has rarely been described. We report a case of a 55-year-old otherwise healthy man, presented with acute onset of pain and restriction of movement of left shoulder, who was diagnosed based on radiographic findings with calcific periarthritis of the acromioclavicular joint. As suggested by the literatures, he was managed conservatively, and no reoccurrence was reported after the episode.