[Encephalopathy in the course of idiopathic hypereosinophilic syndrome -- clinical-morphological correlations].

A case of 33-year-old man, who underwent numerous hospital admissions caused by multiple progressing disseminated neurological abnormalities is presented. At first multiple sclerosis was a tentative diagnosis. Because of persistent eosinophilia, after exclusion of other causes of increased eosinophil count, idiopathic hyperoesinophilic syndrome was diagnosed. The case was confirmed neuropathologically. The authors discuss causes of idiopathic hyperoesinophilic syndrome. Very exceptional history of the syndrome, with dominant CNS involvement, is discussed.