Akutes rheumatisches Fieber (ARF) und Poststreptokokken reaktive Arthritis (PSRA)—

Post-streptococcal scleredema an unusual rare mimicker of scleroderma: a case report

cleredema of Buschke is a rare pathological disorder of connective tissue, which is characterized by a woody, diffuse induration of the skin, most often in the upper extremities. We report an extremely rare complication of post-streptococcal infection in a six-year-old male complaining of gradually progressing, painless skin thickening and tightness which was preceded by a one-month history of fever, cough, and tonsillitis. By reporting this case, we hope to contribute to the creation of a database for future research aimed at better understanding the incidence, pathophysiology, and management of this extremely rare complication.

Pediatric Rheumatology for the Primary Care Clinicians-Recognizing Patterns of Disease

This review presents a diagnostic approach to musculoskeletal and rheumatic diseases in children for primary care clinicians. The focus is on juvenile idiopathic arthritis (JIA) as the major arthritis disease in children. It is necessary to know the personalities of these JIA categories. It is also crucial to be able to recognize the common infectious, orthopedic and mechanical, malignant, genetic, other rheumatic diseases, and other miscellaneous syndromes that can mimic JIA. To do so requires recognition of clinical patterns using a thorough musculoskeletal and rheumatic history and repeated complete physical exams with emphasis on the musculoskeletal exam. It also requires targeted and limited laboratory testing with careful follow-up over time.

The pattern of acute rheumatic fever in children: Experience at the children's hospital, Riyadh, Saudi Arabia

BACKGROUND

The study was carried out in Riyadh City Hospital to determine the hospital prevalence of acute rheumatic fever (ARF), its characteristics and to determine the proportion of the ARF population that have recurrent attacks.

METHODS

The study was an analysis of 83 children with ARF, admitted to the Children's Hospital, Riyadh, over a 10-year period (1994-2003). The diagnosis of ARF was based on clinical features as defined in the modified Jones criteria with evidence of recent streptococcal infection. The diagnosis of recurrence of rheumatic fever in children with rheumatic heart disease was based on the presence of one major criterion apart from carditis or two minor criteria, in addition to evidence of preceding streptococcal infection.

RESULTS

The mean age at presentation was 9 years. In 31 (37%) cases, arthritis was the only major Jones criterion. In 30 (36%) others, arthritis was associated with carditis and in 3 (4%), with chorea. Cardiac involvement was documented in 44 (53%) cases; it occurred alone in 5 (6%), with arthritis in 30 (36%), and with chorea in 9 (11%) others. Among the 44 with carditis, the pattern of cardiac involvement was valvular only (mild carditis) in 30 (68%), while it was severe in the remaining 14 (32%) cases who also had heart failure. The involvement of the mitral valve alone occurred in 26 (59%) cases in the form mitral regurgitation, while both aortic and mitral valve regurgitation were present in 11 (25%) cases, and aortic valve regurgitation alone in four (9%) others. Chorea was the only major criterion of ARF in 5 children (6%), while it occurred in association with other major criteria in 12 (15%) others. Nineteen (23%) children had recurrent attacks of ARF.

CONCLUSION

ARF continues to occur in Saudi Arabia in the period (1994-2003), despite the progress made in the socio-economic development of the country, and this is often associated with severe cardiac involvement.

Host-pathogen interactions in streptococcal immune sequelae

Otherwise uncomplicated infections with Streptococcus pyogenes can cause two insidious immune sequelae known as post-streptococcal glomerulonephritis (PSGN) and acute rheumatic fever (ARF). These diseases follow with a latency of a few weeks or months after primary infection and are responsible for high mortality and morbidity. PSGN has also been linked to infections with group C streptococci of the species S. equi ssp. zooepidemicus (SESZ). Moreover, there are some indications that infection with group C and G streptococci (GCGS) of the subspecies Streptococcus dysgalactiae ssp. equisimilis (SDSE) leads to ARF. Despite decades of research, the picture of the molecular pathogenesis of streptococcal immune sequelae resembles a jigsaw puzzle. Herein we try to put some of the puzzle bits together that have been collected till date.

Adaptive immunity in rheumatic diseases: bystander or pathogenic player?

Rheumatic diseases comprise a wide spectrum of different conditions. Some are caused by disturbances of the adaptive immune system, while defects in innate immune responses have been identified for others. In between are a variety of multifactorial diseases for which the evidence for a causative involvement of the adaptive immune system is still controversial. In these cases, availability of novel drugs that target key players of the adaptive immune system have improved our understanding of the relevance of adaptive immunity to the disease process, but it has also generated unprecedented findings. Rheumatoid arthritis (RA) is a prototypic example of a disease in which the relative contribution of adaptive immunity to disease pathogenesis is incompletely understood. Although numerous markers have been identified that reflect an activated adaptive immune system, several caveats render interpretation of these findings difficult. For one, the very early immune responses initiating disease are likely to take place before an individual is identified as a patient, and are thus difficult to study in the human. Furthermore, increasing evidence points to pathogenetically distinct subgroups within the clinical diagnosis RA, offering the possibility that adaptive immune responses might be relevant to one subgroup but not the other. In addition, many indications for an adaptive immune system involvement are based on associations for which the underlying mechanism is often unknown. Finally, therapeutic interventions targeting the adaptive immune system have generated heterogeneous results. The present review addresses these issues by placing adaptive immune responses in the context of rheumatic diseases, and by reviewing the evidence for a contribution of adaptive immunity to RA.

Schizophrenieforme Symptomatik bei Chorea minor

Die Chorea minor (Sydenham), die häufigste erworbene Ursache für Bewegungsstörungen im Kindesalter, ist gekennzeichnet durch unwillkürliche und abrupte Bewegungsmuster. Bei einem Teil der Patienten treten zusätzlich neuropsychologische Dysfunktionen und psychiatrische Störungsbilder wie Angst-, Zwangs-, und Tic-Störungen auf. Psychotische Symptome wurden dabei bisher nur selten beschrieben (n = 4, davon zwei Fallberichte sowie eine prospektive und eine retrospektive Studie). Wir berichten von einer 12-jährigen Patientin mit akuter paranoid-halluzinatorischer Symptomatik und choreatiformer Bewegungsstörung. Die Kombination der im Hinblick auf die paranoid-halluzinatorische Symptomatik wirksamen antipsychotischen Therapie mit hochdosiertem Prednisolon verbesserte die weiterbestehende Negativ-Symptomatik und führte zu einer vollständigen Remission der Bewegungsstörung. Nach Reduktion der Steroide traten eine Verschlechterung der Negativ-Symptomatik und ein Rezidiv der Bewegungsstörung ein. Ursächlich für die Schizophrenie wird eine Funktionsstörung des Corpus Striatum vermutet, welche sekundär das Arbeitsgedächtnis und den für kognitive Flexibilität bedeutsamen präfrontalen Kortex beeinträchtigt. Als Ursache der Chorea minor gilt eine postinfektiöse autoimmun-mediierte Störung der Basalganglienfunktion, ausgelöst durch einen vorausgegangenen Streptokokken-Infekt. Der Morbus Huntington und der Morbus Wilson sind Bewegungsstörungen, die auf einer Basalgangliendysfunktion beruhen und zudem häufig mit psychotischen Symptomen assoziiert sind. Ähnlich könnte die Kombination aus psychotischer und choreatiformer Symptomatik unserer Patientin auf einer Basalgangliendysfunktion beruhen. Die Negativ-Symptomatik wäre durch eine sekundäre Störung präfrontal kortikaler Strukturen erklärbar.

Poststreptococcal reactive arthritis in children: a retrospective study

The duration of treatment and appropriate guidelines for antibiotic prophylaxis for children with poststreptococcal reactive arthritis (PSRA) have not been determined. The authors performed a retrospective chart review of 40 children with PSRA and examined their clinical features at initial evaluation and at 6, 12, and 24 months. At baseline, 18% (n = 7) had a finding noted on the echocardiogram. Although most patients developed cardiac findings early on in the course of their disease, 2 patients with a normal baseline echocardiogram may have developed findings after 12 months of follow-up. The mean duration of prophylaxis was 22 months. During the follow-up period, there was improvement in Physician's Global Assessment, number of patients with arthralgia, tender and swollen joints, erythrocyte sedimentation rate, anti-streptolysin O, and anti-DNAse B antibody titers. The authors conclude that marked improvement in clinical features and laboratory values was seen over time. Patients may benefit with long-term cardiac follow-up.