[Eosinophilic leukemia as a diagnostic problem]

It is reported on a 23-year-old female patient in whom at the beginning enlargements of the lymphatic nodes and a tumour of the pelvic wall were existing and in the course of the an increasing eosinophilia developed. This reached 158.95 X 19(9)/l in maximum values of leukocytes of 201.2 X 10(9)/l and a large proportion of immature eosinophilic cells. The disease which finally had to be explained as eosinophilic leukemia rendered extraordinary differential-diagnostic difficulties and had a therapeutically uninfluencible fatal course.