<prompt> In which of the following arthritis erosions are not seen:Rheumatoid arthritisSystemic lupus erthematosus SLEPsoriasisGout  <response>: Ans. is b i.e., Systemic lupus erythematosus SLE About Musculoskeletal manifestation in SLE patients, Harrison writes -Poly arthralgias and polyarthritis eventually occur in 90 of SLE patients.The arthritis initially involve the small joints in hands, knees and wrists.Joint deformities develop in only 10.Erosions on joint X-rays are rare, their presence suggest a non lupus inflammatory arthropathy such as rheumatoid arthritis.Joint erosion are well known in all the other three options. 