title: [Juvenile rheumatoid artritis (a single or various diseases?].
abstract: Some characteristics of juvenile rheumatoid arthritis that appeared in recent literature have led us to think that it can be divided into the following four groups: I. Seronegative poliarthritis, with more or less systemic symptoms. With the same characteristics it may appear in adulthood. II. Seropositive poliarthritis, identical to the adult rheumatoid arthritis. III. B-27 negative oligoarthritis, complicated frequently with chronic uveitis and autolimited course. IV. B-27 positive oligoarthritis evolving to ankylosing spondylitis. These groups may represent different diseases.
mesh_terms: D001171:Arthritis, Juvenile / Q000175:diagnosis*; D006801:Humans; D007070:Immunoglobulin A / Q000032:analysis; D007074:Immunoglobulin G / Q000032:analysis; D007075:Immunoglobulin M / Q000032:analysis; D007136:Immunoglobulins / Q000032:analysis*; D012217:Rheumatoid Factor
chemical_list: D007070:Immunoglobulin A; D007074:Immunoglobulin G; D007075:Immunoglobulin M; D007136:Immunoglobulins; D012217:Rheumatoid Factor
vernacular_title: Artritis reumatoide juvenil: una o varias enfermedades?