<prompt> Monoaicular joint involvement is seen in which of the following: September 2007Primary osteoahritisRheumatoid ahritisTubercular ahritisSero-neagtive spond-ahritis  <response>: Ans. C: Tubercular Ahritis Causes of polyahritis: Crystal-induced synovitis: gout, pseudogout calcium pyrophosphate deposition disease, hydroxyapatite Systemic rheumatic disease: rheumatoid ahritis, systemic lupus erythematosus, polymyositisdermatomyositis, juvenile rheumatoid ahritis, scleroderma, SjOgrens syndrome, Behcets syndrome Spondyloahropathies: ankylosing spondylitis, psoriatic ahritis, inflammatory bowel disease, reactive ahritis Reiters Primary osteoahritis 