Prostate biopsy guided by transrectal ultrasound is the main method for final diagnosis of prostate cancer.As it has been widely used, some questions also emerged.

• 经直肠超声前列腺活检是主要确诊前列腺癌的方法,随着其广泛普及,也出现一些问题,主要是活检点数、次数及部位存在差异。