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Chondrocalcinosis

 

  • Meniscal calcification bilaterally noted.
  • Occurs due to deposition of Calcium crystals.
  • CPPD (Calcium Pyrophosphate Deposition Disease) is a very common cause of Chondrocalcinosis.
  • Trauma, Hypercalcaemia (as in Hyperparathyroidism), Haemachromatosis, Ochronosis, Wilson disease are other causes.
  • Arthritides, Osteoarthritis and Gout may cause this condition.

Gout

  • Disorder of Purine metabolism with deposition of Sodium monourate crystals causing inflammatory reaction in cartilage synovium and periarticular tissue.
  • Normal bone density with bone erosions.
  • Marginal, peri-articular and intraosseous erosions (overhanging margin sign).
  • 1st MTP joint most commonly involved.
  • Spine & SI joints infrequent involvement.