[Adult Still's disease with constrictive pericarditis, Sjögren's syndrome and varied leucocytic abnormalities (author's transl)].

Adult Still's disease is a newly described disorder that is of interest not only for the rheumatologist but also for the internist since fever or extra-articular symptoms can reveal this disorder, which appears to be identical to the Wissler-Fanconi's syndrome. We report a new case characterized by the occurrence of a constrictive pericarditis with clinical features of protracted fever, by the late appearance of a Sjögren's syndrome and by peculiar blood abnormalities: hyperleucocytosis up to 80 000 after splenectomy, transient Felty's syndrome, blood monocytosis and bone marrow mastocytosis.