[Churg-Strauss syndrome. Retrospective study of 20 cases].

Churg-Strauss syndrome (CSS) is a disorder characterised by hypereosinophilia and systemic vasculitis complicating a preexisting asthma. Twenty cases have been studied. Mean duration of asthma before CSS was 8 years, the peripheral-blood eosinophilia, always > 1,700/microL, went above 5,000/microL in 17 cases. The clinical manifestations were the following: 20 impairements of general state with fever, 13 peripheral neuropathies, 15 cutaneous injuries, 10 pericardial or myocardial attacks, 10 digestive impairements, 9 muscular and articular diseases, 7 renal diseases--all of them linked with the vasculitis--and 9 upper respiratory tract involvements. Pleuropulmonary or cardiac anomalies have been discovered at the chest X-ray in 14 cases. The diagnosis has been histologicaly confirmed in 15 cases. No clinical or biological or evolutive distinction was noticed between the 15 positive biopsy patients and the 5 negative ones. During 8.4 (+/- 7.9 years) the evolution was caracterised by relapses which have always been announced by increasing eosinophilia. Eighteen patients have been successfully treated with corticoids alone or associated with cyclophosphamid in 9. Survival at 5 years was 85%. Five deaths occured because of CSS (2 because of an unadapted treatment). We have to focus the need for an emergency treatment of CSS. The diagnosis can be done by clinical investigation only, before any anatomopathologic results.