The clinical features, course, prognosis and treatment of juvenile arthritis.

The author's classification of juvenile arthritis (JA) differs from most by utilizing both the type of onset and the disease course separated into individual subgroups. The clinical aspects of each are described in detail, along with the special tests and studies to be done to differentiate them. Particular attention is given to the differences between the four subgroups of the pauciarticular onset group. There are different genetic factors for each subgroup and new data on HLA typing utilizing DNA techniques may be helpful in the prognosis of the disease course. The therapy of JA begins with non-steroidal anti-inflammatory drugs, continues with second-line drugs such as gold and penicillamine, and finally leads to the use of immunosuppressive agents. The range of doses, the maximal dose, and the frequency of administration is given for each medication. The long-term prognosis is generally good, with a low death rate, primarily seen in the systemic onset patients. The causes of death vary around the world. Prognosis for continued joint activity and joint function is determined significantly by the type of onset and is worse in the rheumatoid factor positive polyarticular onset group.