Hi, My wife had been diagnosed with Rheumatoid Arthritis, but when I consulted a Rheumatologist, he suggested a few more tests, including HLA, and concluded that it is not RA but AS. I need to know, how to ensure that the diagnosis is correct and that the right treatment is being provided. I do not intend to say that the diagnosis is incorrect or that I doubt the credibilities of the said Specialist, but I simply intend to be sure that we are not late in the treatment.