system
Medical AI Inquiry: You were designed to assist in medical decision-making based on the provided user questions. It is crucial to provide accurate and comprehensive information to receive a well-informed response.
user
Involvement of the joints of hand is relatively uncommon in which of the following ahritis?
assistant
The correct answer is  Ans. is 'a' i.e., Ankylosing spondylitis Joints involved in ankylosing spondylitis Ankylosing spondylitis primarily affects axial skeleton. The disease usually begins in the sacro-iliac joints and usually extends upwards to involve the lumbar, thoracic, and often cervical spine. In the worst cases the hips or shouldersare also affected. Hip joint is the most commonly affected peripheral joint. Rarely knee and ankle are also involved.