Abstract
Prostate cancer remains one of the most common cancers in men, and while active surveillance using serial prostate-specific antigen (PSA), imaging, and biopsies is the preferred management for low-risk cases, concerns remain about the impact of biopsy-related sexual dysfunction due to proximity to neurovascular bundles.
To evaluate the association in biopsy frequency and sexual function in men on active surveillance (AS) for low-grade prostate cancer.
We analyzed data from the Miami Active Surveillance Trial (MAST, a prospective, single-arm study of men with Gleason grade ≤2 prostate cancer under AS, managed with annual magnetic resonance imaging-ultrasound fusion-guided transrectal ultrasound (TRUS) biopsies. Sexual and hormonal function was assessed using the Expanded Prostate Cancer Index Composite (EPIC) questionnaire at baseline and 12-, 24-, and 36-month follow-ups. Minimally important differences (MID) were defined as 10-12 points for the sexual domain, and 4-6 points for the hormonal domain. Statistical analysis involved repeated measures analysis of variance (ANOVA) and paired t-tests using distribution of EPIC scores.
Annual transrectal biopsies were associated with small, statistically, but not clinically significant declines in sexual function, with no meaningful impact on overall quality of life observed.
Among 200 men enrolled, the median age was 62 years old, 89.5% were white, and 43% were Hispanic. A total of 52 men completed all follow-up biopsies. The mean baseline sexual function score was 43.7 (SD 13.1). Repeated measures ANOVA indicated a statistically significant decline in sexual function over time (P = .0105). Though statistically significant, this decline did not exceed the MID threshold for the sexual domain and therefore not clinically significant. Hormonal scores remained stable and showed no significant difference across time points (P = .5767).
These findings support annual biopsy usage in AS protocols for clinicians without compromising sexual function.
The strengths of this study include rigorous annual biopsy protocols and validated EPIC measures to identify clear clinically significant thresholds. Limitations include sample attrition over time due to longer follow-up and single-institution design.
Increased frequency of TRUS biopsies was associated with a statistically, but not clinically significant decline in sexual function, indicating that annual TRUS fusion biopsies are not likely to significantly impact sexual health and may be confidently recommended for patients on active surveillance.