A patient in their 20’s presents with back pain, dactylitis, sacroiliitis, and has been found to be HLA-B27 positive. What is the likely diagnosis? A patient in their 20’s presents with back pain, dactylitis, sacroiliitis, and has been found to be HLA-B27 positive. What is the likely diagnosis? Ankylosing spondylitis SLE Psoriatic arthritis Rheumatoid arthritis