Epstein-Barr virus-associated Hodgkin's lymphoma and legionella pneumophila infection complicating treatment of juvenile rheumatoid arthritis with methotrexate and cyclosporine A.

We describe the case of a 53-month-old girl with juvenile rheumatoid arthritis (JRA), complicated by the occurrence of Hodgkin's lymphoma and Legionella pneumophila infection during immunosuppressive treatment with methotrexate (MTX) and cyclosporine A (CSA). The girl had received variable anti-inflammatory combination therapy, including MTX for 28 months and CSA for 3 months. Thirty-six months after the onset of arthritis, the girl presented with an enlargement of the lymph nodes of the mediastinum, the hilum of the lungs, and the abdomen. Concomitantly, a diagnosis of Legionella pneumonia was rendered. Autopsy showed Epstein-Barr virus (EBV)-associated nodular sclerosing Hodgkin's lymphoma. The neoplastic cells were positive for CD15, CD 30, and latent membrane protein 1 (LMP 1). The present case is the second reported to occur in a child, and it lends support to the hypothesis that immunosuppressive treatment may contribute to an increased risk of the development of EBV-associated lymphoproliferative disorders (LPD) in pediatric patients suffering from JRA.

Hyperhomocysteinemia in children with juvenile idiopathic arthritis is not influenced by methotrexate treatment and folic acid supplementation: a pilot study.

OBJECTIVE: Our first objective was to compare plasma total homocysteine (tHcy) concentrations in juvenile idiopathic arthritis (JIA) patients requiring methotrexate (MTX) treatment and healthy children. Our second aim was to evaluate the influence of low-dose (10-15 mg/m2/week) MTX treatment combined with folic acid supplementation (1 mg/d) or placebo on tHcy concentrations in JIA patients. METHODS: In 17 JIA patients and 17 age- and sex-matched healthy children, baseline tHcy concentrations were measured. When MTX treatment was initiated, JIA patients were randomly assigned to folic acid 1 mg/d/p.o. followed by placebo (8 weeks each) or vice versa. Blood samples for measurement of tHcy, vitamin B6, B12 and folate were taken after 4 weeks, 12 weeks and 20 weeks of treatment. RESULTS: 1) In the healthy children the mean tHcy concentration was 6.3 +/- 1.68 mumol/l as compared to 9.99 +/- 5.17 mumol/l in JIA patients (p < 0.04). At baseline, 5/17 JIA patients had tHcy concentrations > 10.5 mumol/l, the 99th percentile for teenagers. 3/5 patients even exceeded the upper normal level for adults (tHcy > or = 15 mumol/l). MTX treatment did not result in a significant increase of tHcy and folic acid supplementation had no significant impact on tHcy levels. CONCLUSION: This pilot study shows that patients with JIA requiring MTX treatment have significantly elevated baseline plasma tHcy concentrations compared to age- and sex-matched healthy controls. No significant impact of MTX and folate supplementation on tHcy concentration was found.

[Evidence-based use of methotrexate in children with rheumatic disorders. Consensus statement of the Working Group for Children and Adolescents with Rheumatic Diseases in Germany (AGKJR) and the Working Group Pediatric Rheumatology Austria]. / Evidenzbasierter Einsatz von Methotrexat bei Kindern mit rheumatischen Erkrankungen. Konsensusstatement der Arbeitsgemeinschaft Kinder- und Jugendrheumatologie Deutschland (AGKJR) und Arbeitsgemeinschaft Pädiatrische Rheumatologie Osterreich.

Juvenile idiopathic arthritis (JIA) is the most common diagnosis in children and adolescents with rheumatic disorders. In many children and adolescents, JIA is successfully treated with nonsteroidal antiinflammatory drugs (NSAR) and physiotherapy. Still, in a significant number of cases the disease is resistant to this therapy and treatment with "second line" disease modifying antirheumatic drugs (DMARDs) is required. Methotrexate (MTX) is frequently referred to as "first choice second line agent" for the treatment of JIA. However, there are considerable differences among pediatric rheumatologists on how and when to use MTX. To increase drug safety, the Working Group for Children and Adolescents with Rheumatic Diseases in Germany (AGKJR) and the Working Group Pediatric Rheumatology Austria have initiated the formulation of evidence-based recommendations. Evidence is based on consensus expert meetings, a MEDLINE search with the key words "Methotrexate" and "juvenile arthritis" limited to age 0-18 years, standard textbooks and review articles, data from the central registry of the German Research Center for Rheumatic Diseases (Deutsches Rheumaforschungszentrum Berlin), experience with MTX in adults with rheumatoid arthritis (RA) and recommendations of the German Society of Rheumatology (DGRh). Based on these data, evidence and recommendations are graded and evidence-based recommendations for the use of MTX in children and adolescents with rheumatic disease are presented.