primary musculoskeletal lymphoma presenting as monoarthritis is very rare. less than 20 cases have been reported. the ultrasound appearances have not been reported to date. we present a young female of primary knee lymphoma with synovial involvement presenting as monoarthritis. the ultrasound and mri features are discussed.

To investigate associations between infections and acute monoarthritis, we performed a prospective study on 32 children consecutively hospitalized and 32 age-matched controls. Among 26 (81%) children having infections, the most frequent agents were Group A ?-hemolytic Streptococcus (GAS: 53%) and Epstein-Barr virus (EBV: 37.5%). Among controls, only 5 (16%) were infected with GAS and 2 (6%) wit...

Monoarthritis remains a diagnostic challenge in Rheumatology and Orthopedics. The author reports a case of septic arthritis due to Streptococcus bovis after several episodes of joint effusion treated with hyaluronic acid (Hylan G-F 20) and methylprednisolone acetate in a 69-year-old patient with liver cirrhosis due to hepatitis C virus. Neither adenoma of the colon nor endocarditis was present....

OBJECTIVE To standardize an experimental model of chronic monoarthritis induced by complete Freund's adjuvant appropriate for the analysis of the effect of walking on nociception and on joint edema. METHODS The following factors were evaluated as to monoarthritis induction: route and site of administration, number and interval of inoculations, Mycobacterium species, and animal gender. Wistar ...

OBJECTIVE Because Lyme and septic arthritis may present similarly, we sought to identify children with knee monoarthritis at low risk for septic arthritis who may not require arthrocentesis. METHODS We performed a retrospective study of children with knee monoarthritis presenting to 1 of 2 pediatric centers, both located in Lyme disease-endemic areas. Septic arthritis was defined by a positiv...