<prompt> Answer this question truthfullyWhat does monoarticular arthritis mean?  <response>: <reason> Avascular necrosis of boneCrystals:Monosodium urate Calcium pyrophosphate dihydrate Apatite Calcium oxalateHemarthrosisInfectious arthritisBacteria Fungi Mycobacteria Viruses Lyme diseaseInternal derangement Osteoarthritis Osteomyelitis Overuse TraumaBone malignancies Bowel-diseaseassociated arthritis Hemoglobinopathies Juvenile rheumatoid arthritis Loose body Psoriatic arthritis Rheumatoid arthritis Reactive arthritis SarcoidosisAmyloidosis Behçets syndrome Familial Mediterranean Fever Foreign-body synovitis Hypertrophic Osteoarthropathy Intermittent hydrarthrosis Pigmented villonodular synovitis Relapsing polychondritis Stills disease Synovioma Synovial metastasis Vasculitic syndromes 