Active surveillance means patients are monitored closely without active treatment immediately.Many studies have shown that active surveillance,as a relatively safe method for prostate cancer patients,can reduce overtreatment,and is one of the main methods for very low risk,low risk and a small proportion of intermediate risk men with a life expectancy more than 10 years.The follow-up process of active surveillance includes regularly repeat needle biopsy,PSA test,digital rectal examination,multiparametric magnetic resonance imaging(mpMRI),etc.However,the monitoring standard and frequency are still not unified.There is still a lack of active surveillance data in China,and further research is needed.
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