What is the most likely diagnosis?
- 61 year-old man with shoulder pain
AP Radiograph of Shoulder
- Heterotopic Ossification
- Hydroxyapatite Deposition Disease
- Calcinosis Universalis
- Fracture of Greater Tuberosity
- Metastatic prostate Cancer
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Answer:
2. Hydroxyapatite Deposition Disease
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Hydroxyapatite Deposition Disease
General Considerations
- Calcium phosphate crystals are deposited in the form of calcific tendinitis, other periarticular hydroxyapatite deposition, and hydroxyapatite-induced arthritis
- May be primary, such as calcific tendinitis and bursitis, or secondary, as in dystrophic calcification in chronic renal disease or collagen vascular diseases
- Most common in middle aged men, slightly greater than women
- The shoulder is the most common site