alexa There is no correlation between erectile dysfunction and dose to penile bulb and neurovascular bundles following real-time low-dose-rate prostate brachytherapy.
Reproductive Medicine

Reproductive Medicine

Reproductive System & Sexual Disorders: Current Research

Author(s): Solan AN, Cesaretti JA, Stone NN, Stock RG

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Abstract PURPOSE: We evaluated the relationship between the onset of erectile dysfunction and dose to the penile bulb and neurovascular bundles (NVBs) after real-time ultrasound-guided prostate brachytherapy. METHODS AND MATERIALS: One hundred forty-seven patients who underwent prostate brachytherapy met the following eligibility criteria: (1) treatment with 125I brachytherapy to a prescribed dose of 160 Gy with or without hormones without supplemental external beam radiation therapy, (2) identification as potent before the time of implantation based on a score of 2 or higher on the physician-assigned Mount Sinai Erectile Function Score and a score of 16 or higher on the abbreviated International Index of Erectile Function patient assessment, and (3) minimum follow-up of 12 months. Median follow-up was 25.7 months (range, 12-47 months). RESULTS: The 3-year actuarial rate of impotence was 23\% (34 of 147 patients). An additional 43\% of potent patients (49 of 113 patients) were using a potency aid at last follow-up. The penile bulb volume receiving 100\% of the prescription dose (V(100)) ranged from 0-0.05 cc (median, 0 cc), with a dose to the hottest 5\% (D(5)) range of 12.5-97.9 Gy (median, 40.8 Gy). There was no correlation between penile bulb D(5) or V(100) and postimplantation impotency on actuarial analysis. For the combined right and left NVB structures, V(100) range was 0.3-5.1 cc (median, 1.8 cc), and V(150) range was 0-1.5 cc (median, 0.31 cc). There was no association between NVB V(100) or V(150) and postimplantation impotency on actuarial analysis. CONCLUSION: Penile bulb doses are low after real-time ultrasound-guided prostate brachytherapy. We found no correlation between dose to either the penile bulb or NVBs and the development of postimplantation impotency. This article was published in Int J Radiat Oncol Biol Phys and referenced in Reproductive System & Sexual Disorders: Current Research

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