This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Orthopaedics
Joint erosions are seen in all Except 
Select and explain. 
A. SLE, B. Gout, C. RA, D. OA
D: OA
Answer: D: OA 
Explanation: Osteoahritis is a disease of aicular cailage not of joint Joints involved in ahritis Ahritis Type MC joints Less common Not involved Nature Rheumatoid ahritis Poly MCP, PIP , MTP Knee , Cervical spine DIP , Hip Erosive painful SLE Poly MCP , Wrist Non erosive Osteoahritis Poly DIP , Knee , Sacro iliac Wrist , MCP Psoriatic ahritis Pauci / Oligo PIP , DIP Painful Gout Mono MTP of the great toe Erosive painful Ankylosing spondylitis Mono Axial skeleton Hip ? Hand Inflammatory (Refer: Mohindra's Fundamentals of Ohopedics, 2nd edition, pg no. 88, 101, 418, 419, 426)