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
Primary osteoahritis affect all except:
assistant
The correct answer is  Osteoahritis involves DIP and PIP with sparing of MCP. Rheumatoid ahritis involves PIP and MCP with sparing of DIP. Osteoahritis commonly involves knee joint in India. Hip joint is rarely involved in osteoahritis.