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Avascular Necrosis / Osteonecrosis


Blood flow is necessary for musculoskeletal function. When injury or other factor interrupts normal blood (vascular) flow, the result is death or necrosis of the bone and tissue. Read on to learn more about this condition that causes the bone to collapse onto itself.

Causes & Triggers

  • Bone fracture
  • Excessive alcohol consumption
  • Joint dislocation
  • Prolonged steroid use

Signs & Symptoms

  • Difficulty standing or walking
  • Grating
  • Persistent pain

Tips & Treatment

  • Symptoms may not be prevalent in the early stages.
  • Pain can be mild or severe, but usually develops gradually.
  • Pain is often focused in groin, thigh or buttock area.
  • Pain may start with any weight-bearing activity, worsening over time until even lying down is painful.
  • The condition usually has a unilateral component, meaning it develops on both sides at same time.
  • Affects any joint, especially hips and knees.
  • Treatment may range from pain management to surgical joint replacement.

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