A 48-year-old woman with seropositive rheumatoid arthritis presents with this solitary, rapidly expanding and very painful (analog scale 9 out of 10) ulcer on the pretibial surface of her leg. Can you choose the correct diagnosis from the differentials?
(VIDEO) Researchers in Norway used data from an observational study of patients with swollen joints to see how many with early signs of rheumatoid arthritis recovered without any treatment at all, and how quickly.
ACR2013: Joints erode in systemic lupus erythematosus and primary Sjӧgren’s Syndrome. But French researchers say their MRI studies don't justify classing them as erosive disorders like rheumatoid arthritis.