AVASCULAR NECROSIS

AVASCULAR NECROSIS


AVASCULAR NECROSIS

  • Also known as osteonecrosis or aseptic necrosis.
  • Condition where the blood flow to an area of bone is compromised.
  • Avascular necrosis causes deformation of the bone.
  • Leads to secondary osteoarthritis a few years later.
  • Thus causing painful limitation of joint movement.
Common sites:

Site

Cause

  Head of the femur (m/c)
  • Fracture neck of the femur.
  • Posterior dislocation of the hip
  Proximal pole of scaphoid
  • Fracture through the waist of the scaphoid
  Body of the talus
  • Fracture through neck of the talus
Causes of AVN

  • Steroids
  • Alcohol
  • Sickle cell disease
  • Trauma

Symptoms of AVN

  • Pain, often in the groin or buttock
  • Stiffness of the hip joint

Diagnosis

Radiological changes:

  1. Sclerosis of necrotic area
  2. Deformity of the bone-because of the collapse of necrotic bone
  3. Osteoarthritis- giving rise to diminished joint space, osteophytes 

Bone scan:
  • Visible as ‘cold area’ on the bone scan.
Treatment:
  • Depending on multiple contributing factors, AVN can be treated with or without surgery.

Conservative (non-operative)

  • Observation
  • Restricted weight bearing
  • Anti-inflammatory medications
  • Bisphosphonates
Surgical treatment

  • Core decompression
  • Hip replacement

Exam Important

  • Avascular necrosis is commoner in Head of the femur.
  • Best diagnostic modality to diagnose avascular necrosis is MRI scan.
Don’t Forget to Solve all the previous Year Question asked on AVASCULAR NECROSIS
Click Here to Start Quiz

Module Below Start Quiz

Leave a Reply

%d bloggers like this:
Malcare WordPress Security