Extended followup of the influence of wide excision of the neurovascular bundle(s) on prognosis in men with clinically localized prostate cancer and extensive capsular perforation

Abstract

Purpose: The effect of wide excision of the neurovascular bundles on disease-free survival was determined in men with clinically localized prostate cancer and pathological evidence of extensive capsular perforation in the region of the neurovascular bundle.

Materials and methods: We previously analyzed 107 men with clinically localized prostate cancer and pathological evidence of extensive capsular perforation in the region of the neurovascular bundles. Wide excision of the neurovascular bundle on the sides of palpable induration resulted in negative surgical margins in 58% of patients compared to only 45% in whom the neurovascular bundles were left intact (p = 0.03). At a mean followup of 20 months, median interval to disease recurrence as defined by a measurable PSA level was 33 months in patients whose neurovascular bundle(s) were widely excised versus 22 months in those whose neurovascular bundle(s) were left intact (p = 0.03). However, by 43 months 75% of the patients in both groups had a detectable prostate specific antigen and the Kaplan-Meier curves had converged, suggesting that wide excision of the neurovascular bundle(s) did not confer a sustained survival advantage.

Results: With an additional followup of 28 months, the probability of having an undetectable prostate specific antigen level at 5 years was 47% in patients with negative versus 6% with positive surgical margins (p < 0.001).

Conclusions: Our extended followup suggests that some patients with extensive capsular perforation can be rendered free of disease with wide excision of the neurovascular bundle(s).