Diagnosis and Management of Acute Joint Pain in the Emergency Department (https://www.ebmedicine.net/topics/musculoskeletal/joint-pain)Interview with author: Rachel Sullivan, MD* Why joint pain ?* Differential Diagnosis Mono vs Poly Articular Presentation? Figure 1Infectious, degenerative, autoimmune, crystal deposition, reactive, traumaticSeptic Arthritis-Bimodal incidence RisksSeptic arthritis is polyarticular in 15% to 20% of cases, and in these cases, the mortality is highGonococcal Highest riskCommonly affected jointsSymptomatic or asymptomatic infection Lyme ArthritisViral - Zika, chikungunya, human parvovirus B19, hepatitisDegenerative osteoarthritis AutoimmuneGoutCPPD* Prehospital * ED History - table 2, table 4* ED exam * Labs - do we need them? * Imaging* Arthrocentesis - Table 5* Treatment* Special PopulationsProstheses Immunocompromised HIV* Clinical Pathway