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Rev Urol ; 20(1): 19-25, 2018.
Article in English | MEDLINE | ID: mdl-29942197

ABSTRACT

Herein, the authors compare morbidity in men who underwent both transrectal ultrasound-guided (TRUS) prostate biopsy and transperineal mapping biopsy (TPMB) at two institutions with extensive experience in both procedures. We also identified strategies and predictive factors to reduce morbidity for both procedures. In our study, 379 men from two institutions, of which 265 (69.9%) had a prior TRUS-guided biopsy, also had TPMB performed via a template with biopsies taken at 5-mm intervals. Men in the TRUS group had a median of 12 cores sampled whereas the TPMB group had 51.5 (range, 16-151). The median biopsy density was 1.1 core/cc prostate volume. Median age and prostate-specific antigen (PSA) level were 65 years (range, 34-86) and 5.5 ng/mL (range, 0.02-118). Of these men, 11 of 265 (4.2%) who had TRUS biopsy developed urinary tract infection compared with 3 of 379 (0.79%) of those with mapping biopsy. Infection was 14.8% in TRUS biopsy group with 13 or more cores versus 2.9% in those with 12 or less (OR, 5.8; 95% CI, 1.6-21.2; P = 0.003). No men developed retention after TRUS biopsy whereas 30 of 379 (7.9%) did following TPMB. Older age, larger prostate volume (PV), and higher core number were associated with retention. On linear regression only age (P = 0.010) and PV (P = 0.016) remained as significant associations. Men older than 65 years had 12.8% versus 3.9% (OR, 3.7; 95% CI, 1.6-8.4, P = 0.001) and PV greater than 42 cc had 13.4% versus 2.7% (OR, 5.7; 95% CI, 2.1-15.1) retention incidence. In the present study TPMB is rarely associated with infection (0.78%) but more commonly with urinary retention (7.9%). Men older than 65 years and with PV greater than 42 cc were at four to five times greater retention risk. Consideration should be given to discharging these men with a urinary catheter following TPMB.

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