title: The hypereosinophilic syndrome--a diagnostic enigma.
abstract: The hypereosinophilic syndrome groups together a number of conditions in which eosinophilia occurs for no apparently identifiable cause. Initial reports indicated a uniformly grave prognosis but recent observations suggest a more favourable outcome in certain cases. Two patients with hypereosinophilic syndrome are described whose course of disease and outcome have been completely different.
mesh_terms: D000293:Adolescent; D000328:Adult; D004802:Eosinophilia / Q000175:diagnosis*; D006801:Humans; D008297:Male; D011379:Prognosis; D013577:Syndrome