A Rare Case of Adult-onset Still's Disease Revealed by Acute Myopericarditis

Background: Still's disease in adults is a systemic inflammatory pathology of unknown aetiology, characterized by clinical manifestations associating feverish peaks, arthritis or arthtralgia, transient rashes and hyperferritinemia.

Currently, this disease remains a multisystemic disease with generally poor outcome, poorly described in the literature with very few studies unlike other rheumatic diseases, probably underdiagnosed due to its clinical polymorphism.

Cardiac forms are quite rare and among the manifestations described, pericarditis remains the most reported entity, myocardial involvement is exceptional.

The aim of our observation is to report an exceptional case of discovery of stille disease following a myo-pericarditis mimicking a coronary Sd initially.