Abstract
Chapter 37 discusses calcific hydroxyapatite deposition disease (HADD). Hydroxyapatite (HA) crystal deposition disease is a systemic disease of unknown etiology that is caused by periarticular and/or intraarticular deposition of HA crystals. The shoulder is the most commonly involved joint with calcification in the supraspinatus tendon, but not all patients with HADD are symptomatic. Radiography is the main diagnostic tool for HADD, which may show calcifications of varying size and shape in the periarticular tendons, bursae, and joint capsule with joint destruction. Ultrasound can be useful in evaluation and image-guided treatment of calcific tendinitis.
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