[Utilization behavior during the course of progressive multifocal leukoencephalopathy].

A particular semiologic feature of a case of progressive multifocal leukoencephalopathy was the existence of utilization behavior as described by Lhermitte. The affection developed in a patient with myeloid leukemia treated by cytotoxic drugs. Multifocal low density areas were shown by CT Scan examination. The course of the disease was not altered by isoprinozine therapy.