title: [Presence of riziform bodies in a patient with juvenile idiopathic arthritis: case report and literature review.]
abstract: Riziform bodies are structures formed by fibrin and cells that can be found in the synovial fluid or attached to the synovium, and have this denomination due to its rice grain-like appearance. They have already been described in several diseases such as tuberculous arthritis, rheumatoid arthritis, and rarely in juvenile idiopathic arthritis (JIA). This is the case of a boy with a 4-month course of chronic monoarthritis of the left knee, with family history of sarcoidosis in which diagnostic investigation showed the presence of these riziform bodies in the synovial biopsy. Diagnostic investigation ruled out sarcoidosis, tuberculosis and malignancies, establishing the diagnosis of JIA. Our objective was to describe what we believe is the 9th case reported on the presence of riziform bodies in JIA, which are probably underdiagnosed, and should be considered mainly in cases of severe arthritis of difficult medical treatment.
authors.affiliation: Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ, Brasil.
authors.forename: Leonardo Rodrigues
authors.initials: LR
authors.lastname: Campos
authors.affiliation: Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ, Brasil.
authors.forename: Fernanda Cardoso das Neves
authors.initials: FC
authors.lastname: Sztajnbok
authors.affiliation: Faculdade de Ciências Médicas, Universidade do Estado do Rio de Janeiro, Rio de Janeiro, RJ, Brasil.
authors.forename: Stélio
authors.initials: S
authors.lastname: Galvão
authors.affiliation: Faculdade de Ciências Médicas, Universidade do Estado do Rio de Janeiro, Rio de Janeiro, RJ, Brasil.
authors.forename: Marise de Araújo
authors.initials: MD
authors.lastname: Lessa
authors.affiliation: Laboratório Cláudio Lemos Anatomia Patológica Ltda. Hospital Mário Kroeff, Rio de Janeiro, RJ, Brasil.
authors.forename: Ierecê Lins
authors.initials: IL
authors.lastname: Aymoré
authors.affiliation: Universidade Federal do Rio de Janeiro, Núcleo de Estudos da Saúde do Adolescente, Universidade do Estado do Rio de Janeiro, Rio de Janeiro, RJ, Brasil. Electronic address: flaviosztajnbok@hotmail.com.
authors.forename: Flavio
authors.initials: F
authors.lastname: Sztajnbok
keywords: Artrite idiopática juvenil; Chronic monoarthritis; Corpos riziformes; Juvenile idiopathic arthritis; Monoartrite crônica; Riziform bodies; Tuberculose; Tuberculosis