This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Surgery
Joint erosion not a feature in ? 
Select and explain. 
A. SLE, B. Gout, C. Rheumatoid ahritis, D. Psoriasis
A: SLE
Answer: A: SLE 
Explanation: Ans. is 'a' i.e., SLE Most people with SLE have intermittent polyahritis, varying from mild to disabling, characterized by soft tissue swelling and tenderness in joints, most commonly in hands, wrists, and knees. Joint deformities (hands and feet) develop in only 10% of patients. Erosions on joint x-rays are rare; their presence suggests a non-lupus inflammatory ahropathy such as rheumatoid ahritis.