Transrectal biopsy. An ultrasound probe is inserted to the rectum to show where by the tumor is. Then a needle is inserted in the rectum into your prostate to get rid of tissue in the prostate. The echoes form a picture of entire body tissues referred to as a sonogram. https://www.sgvascularctr.com/the-definitive-guide-to-enlarged-prostate-treatment-in-singapore/