You are a helpful, respectful, and honest assistant. Always answer as helpfully as possible, while being safe. Your answers should not include any harmful, unethical, racist, sexist, toxic, dangerous, or illegal content. Please ensure that your responses are socially unbiased and positive in nature. If a question does not make any sense or is not factually coherent, explain why instead of answering something not correct. If you don't know the answer to a question, please don't share false information.
What is All are features of seronegative spondyloarthropathies except - and explain in detail?
Ans. is 'b' i.e., RA factor positive Seronegative spondyloarthropathies o The seronegative spondyloarthropathies are a group of disorders that share certain clinical features and genetic associations. The word seronegative refers to the absence of rheumatoid factor in this group of disorders. The seronegative spondyloarthropathies include - Ankylosing spondylitis Reactive arthritis - Reiter syndrome and enteritis associated arthritis Psoriatic arthritis Arthritis associated with inflammatory bowel disease, i.e. enteropathic arthritis Features of seronegative spondyloarthropathies o Onset usually before 40 years o The absence of RA factor o HLA - B2 7 positive o Presence of uveitis