[Unilateral rheumatoid arthritis].

The authors describe a case of left monolateral rheumatoid arthritis of a patient who nine years previously presented ischemic cerebral lesion resulting in right emiparesis. It should be noted that rheumatoid arthritis appears clinically and radiologically monolateral, whereas from a histological viewpoint the lesions are always bilateral. This brings to mind previously advanced hypothesis to explain this rare expression of rheumatoid arthritis. In conclusion the main factor for articular protection is the rest period induced by the stroke.