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[Strategies for early diagnosis and prevention of prostate cancer].

Prostate cancer (CaP) has become the most frequent cancer in France and represents the 4th cause of mortality by cancer. Main risk factors include age, family history, black ethnic origin and carcinogenesis results from interaction between environmental and endogen factors. This work aimed to review main data and strategic trends about evolution of prevention and early diagnosis of CaP. Research topics considered as priorities results from the main objective including definition of most efficient medico-economic strategies according to epidemiology, diagnostic and therapeutic modalities and ethno-sociologic particularities, including in the schema presently used (PSA/biopsies): 1) new markers (genetic, serum and urinary), measurable environmental risk factors and potential prevention actions; 2) functional imaging (new techniques including contrast echography, dynamic MRI, spectro-MRI) in order to avoid unnecessary biopsies (60-70% biopsies are negative); 3) optimization of biopsies technique in identifying tumor zones in order to decrease false negative biopsies (about 15% of CaP < 0,5 cm3 but of high grade are missed in the first set of biopsies) and in improving the representativity of the tumor sample biopsied (discordance of about 40% between biopsy data and complete pathological analysis of prostatectomy specimen); 4) development of predictive models in order to perform individual prediction taking into account several risk factors (clinical and molecular) and genes/environment interactions in order to offer rational help in diagnostic and primary prevention procedures.