Avascular necrosis of the radial carpal bone

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Avascular necrosis of the canine radial carpal bone is a rare orthopedic disease of the distal radial carpal bone characterized by osteolysis.

In humans, this disease is thought to be initiated by carpal fracture nonunion[1], but in dogs, the cause is unknown.

Resembling Preiser's disease of humans, this condition appears histologically as replacement of healthy bone with granulation tissue suggestive of ischaemic necrosis[2].

Diagnosis is usually suggestive from radiographic appearance but definitive diagnosis requires histological examination of bone biopsies.

Treatment is usually curative with pancarpal arthrodesis.

References

  1. Sunagawa T et al (2000) Role of conventional and vascularized bone grafts in scaphoid nonunion with avascular necrosis: A canine experimental study. J Hand Surg Am 25(5):849-859
  2. Aiken MJ et al (2013) Avascular necrosis of the canine radial carpal bone: a condition analogous to Preiser's disease? J Small Anim Pract Apr 26