Prostate cancer diagnosis is associated with an increased risk of erectile dysfunction after prostate biopsy
Correspondence: Kevin T. McVary, Department of Urology, 675 North St. Clair Street,Suite 20-150, Chicago, IL 60611, USA.
What's known on the subject? and What does the study add?
- There have been several studies that have suggested there may be a relationship between prostate biopsy and erectile function and LUTS. Previous studies have suggested a specific association between the type of local anaesthesia administered and/or the number of biopsies performed. Other studies have suggested an exacerbation of LUTS after prostate biopsy.
- The present study identifies a positive cancer diagnosis as a novel characteristic that may explain a relationship between biopsy and worsening erectile function.
- To evaluate prospectively the characteristics, erectile function and lower urinary tract symptoms (LUTS) of men undergoing prostate needle biopsy (PNBx).
Patients and Methods
- From 2008 to 2011, 134 men were prospectively administered the International Index of Erectile Function (IIEF), American Urological Association Symptom Index (AUA-SI), and quality-of-life (QoL) questionnaires before and after undergoing a single 12-core PNBx.
- Comparisons of IIEF and AUA-SI scores before and after PNBx, based upon baseline characteristics and prostate cancer (PCa) diagnosis, were performed.
- Univariable and multivariable logistic regression models were used to characterize predictors of change in IIEF scores.
- In the 85 men who fulfilled the inclusion criteria, there were no significant differences between the mean (sd) total pre-biopsy and the mean (sd) post-biopsy IIEF scores: 57.8 (12.9) vs 54.3 (17.2).
- Subgroup analysis showed that men who had biopsy-proven PCa had significantly greater changes in their post-biopsy IIEF scores compared with men without (−10.1 vs. 1.0; P < 0.001).
- After specific analyses of the IIEF domains in these groups we found significant decreases in every domain, including erectile function (P = 0.01). On multivariate analyses, only PCa diagnosis was associated with a significant change in IIEF (odds ratio 7.2; P = 0.003).
- There were no differences in AUA-SI or QoL scores in the overall population or in subgroups.
- Cancer diagnosis appears to have an adverse effect on the erectile function of men undergoing PNBx but no effect on LUTS. This study highlights a potential negative psychological confounder that may influence erectile function before the treatment of PCa.
- Additional prospective trials evaluating these relationships are warranted.