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Cytologic regression grading of hormone‐treated prostatic cancer

Aspiration cytology during hormone treatment of prostatic cancer has been regularly performed at the University of Munich for 13 years and gives direct information on the primary tumor. To analyse its value in clinical practice, 919 biopsies of 187 patients were reviewed without knowledge of clinical data and the charts were analysed retrospectively. Each biopsy was classified as having good, medium, or poor therapeutic response depending on the regressive changes of the cells. Agreement between two independent observers was 89%