[The use of millipore technique in cytodiagnostic studies of urine]

The author describes the principles of studying the urine by using millipore technique searching for neoplastic cells. The technique consists in passing the urine sample through a biological filter containing pores of specific diameter (millipore) allowing to condense the cellular and amorphous elements of the urine in a small surface and to obtain preparations of a good quality. This technique is recommended especially in case of transparent urine remaining within the limits of norm on gross examination.