The using of arthroscopy and synovial biopsy in chronic knee monoarthritis in children

Five CKMA boys transformed in juvenile spondiloarthropathy (3 had psoriatic arthritis). Juvenile rheumatoid arthritis was diagnosed in 6 children (4 F: 2 M), all girls were ANA-positive and developed oligoarthritis and one also had uveitis. There were 3 cases of tuberculosis arthritis without primary lung damage. Another cases included knee osteoarthritis, Borrellia burgdorfery infection, angiodysplasia of knee, posttraumatic arthritis with meniscus damage, osteochondritis dissecans and Hoffa disease. The largest group consisted of children with chronic villous proliferate synovitis (6 F: 2 M) unknown origin was revealed by arthroscopy and synovial biopsy. Chlamydia infection was detected in synovial fluid and membrane in 2 children. Synovial histology was determined as focal hypertrophy of synovial membrane with mononuclear cell infiltration in half patients as signs of neoangiogenesis in another part. This form of CKMA was torpid.