RT Journal Article SR Electronic T1 A fibrin based model for rheumatoid synovitis JF Annals of the Rheumatic Diseases JO Ann Rheum Dis FD BMJ Publishing Group Ltd and European League Against Rheumatism SP 1135 OP 1138 DO 10.1136/ard.2003.011767 VO 62 IS 12 A1 O Sánchez-Pernaute A1 R Largo A1 E Calvo A1 M A Alvarez-Soria A1 J Egido A1 G Herrero-Beaumont YR 2003 UL http://ard.bmj.com/content/62/12/1135.abstract AB Intracavitary fibrin clots may initiate pannus formation and the immunopathology of RA. Two critical steps, probably host dependent, may determine the development of RA: an altered regulation of extravascular haemostasis or an aberrant reactivity of synovial fibroblasts to the adhered fibrin clots. Current treatments for RA target events downstream of fibrin deposition, perhaps agents acting at an earlier stage should be tried.