Joint effusion a resultant large effusion due to inflammation. Gout is usually present with recurrent attacks of acute inflammatory arthritis (red, tender, hot, swollen joint). It is caused by elevated levels of uric acid in the blood that crystallizes and deposits in joints, tendons, and surrounding tissues. Gout affects 1% of individuals in Western populations at some point in their lives. Trauma from ligamentous, osseous or meniscal injuries can result in an effusion. These are often hemarthrosis or bloody effusions. Rest Joint effusion A joint effusion is the presence of increased intra-articular fluid. It may affect any joint. Commonly it involves the
Juvenile idiopathic arthritis Juvenile idiopathic arthritis Juvenile idiopathic arthritis (JIA), also known as juvenile rheumatoid arthritis, is the most common form of arthritis in children and adolescents. ("Juvenile" in this context refers to an onset before age 16, "idiopathic" refers to a condition with no defined cause, and "arthritis" is the inflammation of the synovium of a joint.) JIA is an autoimmune, noninfective, inflammatory joint disease of more than 6 weeks duration in children less than 16 years of age. The disease commonly occurs in children from the ages of 1 to 6, but it may develop as late as 15 years of