Rheumatology is one of the easier specialty tested on USMLE and hence every applicant should make it a point to get all their Rheumatology questions correct. This chapter covers all important topics tested on USMLE from this speciality. Notable topics are SLE, Systemic Sclerosis, OA, Gout, Inflammatory myopathies, Low back pain. Quick reference tools in this chapter include Joint aspiration studies, Differential of joint diseases, Low back pain differential, Inflammatory myopathy, various Vasculitis syndrome.