Question
The patient is presenting with the deformity of the finger as shown. The PIP is involved but the DIP is spared
A. |
Osteoarthritis
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B. |
Rheumatoid arthritis
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C. |
Psoriatic Arthritis
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D. |
Ankylosing spondylitis
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Show Answer
Correct Answer � B
Explanation
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Ans: b.Rheumatoid arthritis
Swan neck deformity is a deformity of the digits that consists of:
- hyperextension of the proximal interphalangeal (PIP) joints
- compensatory flexion of the distal interphalangeal (DIP) joints
Pathology
Swan neck deformity is seen in:
- rheumatoid arthritis (classical association)
- post-traumatic: particular post mallet finger injury
- scleroderma
- psoriatic arthritis
- systemic lupus erythematosus arthropathy
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