Q:

Osteoarthritis most commonly affects which ONE of the following sites?

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Osteoarthritis most commonly affects which ONE of the following sites?


  1. Ankle joint.
  2. Costchondral joint.
  3. Knee joint.
  4. Metacarpophalangeal joint.
  5. Proximal interphalangeal joint.

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The answer is C. Osteoarthritis affects principally large load bearing joints, the knee and hip being most severely affected. Smaller joints develop osteoarthritis as a result of repeated trauma.

The small joints of the hand (D, E) are the usual site of rheumatoid arthritis.

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