Abstract: Adult Still's disease is an auto inflammatory disease with a polygenic character. It is only another facet of the childhood Still's disease which constitutes the original version of the disease. Its etiopathogeny remains obscure. To date, the diagnosis of adult Still's disease is based on a set of clinical and paraclinical arguments in the absence of a pathognomonic clinical or biological marker of the disease. In this book, you will discover the key to the diagnosis of Still's disease through evidence-based medicine. In this book, you will discover the key to the diagnosis of Still's disease through evidence-based medicine. The updated data from the literature are synthesized to arrive at a diagnostic and therapeutic algorithm that highlights the various diagnostic pitfalls and therapeutic tips. Still's disease has not yet revealed all its secrets...and research continues to tell us more about biomarkers, pharmacogenetics....